Subject: + mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page.patch added to -mm tree
To: sasha.levin@xxxxxxxxxx,kirill@xxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Fri, 27 Dec 2013 14:14:57 -0800
The patch titled
Subject: mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
has been added to the -mm tree. Its filename is
mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Sasha Levin <sasha.levin@xxxxxxxxxx>
Subject: mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
Most of the VM_BUG_ON assertions are performed on a page. Usually, when
one of these assertions fails we'll get a BUG_ON with a call stack and the
registers.
I've recently noticed based on the requests to add a small piece of code
that dumps the page to various VM_BUG_ON sites that the page dump is quite
useful to people debugging issues in mm.
This patch adds a VM_BUG_ON_PAGE(cond, page) which beyond doing what
VM_BUG_ON() does, also dumps the page before executing the actual BUG_ON.
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/mm/gup.c | 8 +++---
include/linux/hugetlb.h | 2 -
include/linux/hugetlb_cgroup.h | 4 +--
include/linux/mm.h | 24 ++++++++++----------
include/linux/mmdebug.h | 3 ++
include/linux/page-flags.h | 10 ++++----
include/linux/pagemap.h | 10 ++++----
mm/cleancache.c | 6 ++---
mm/compaction.c | 2 -
mm/filemap.c | 16 ++++++-------
mm/huge_memory.c | 36 +++++++++++++++----------------
mm/hugetlb.c | 10 ++++----
mm/hugetlb_cgroup.c | 2 -
mm/internal.h | 10 ++++----
mm/ksm.c | 12 +++++-----
mm/memcontrol.c | 28 ++++++++++++------------
mm/memory.c | 8 +++---
mm/migrate.c | 6 ++---
mm/mlock.c | 4 +--
mm/page_alloc.c | 22 +++++++++---------
mm/page_io.c | 4 +--
mm/rmap.c | 10 ++++----
mm/shmem.c | 8 +++---
mm/slub.c | 12 +++++-----
mm/swap.c | 36 +++++++++++++++----------------
mm/swap_state.c | 16 ++++++-------
mm/swapfile.c | 8 +++---
mm/util.c | 2 -
mm/vmscan.c | 20 ++++++++---------
29 files changed, 171 insertions(+), 168 deletions(-)
diff -puN arch/x86/mm/gup.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page arch/x86/mm/gup.c
--- a/arch/x86/mm/gup.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/arch/x86/mm/gup.c
@@ -108,8 +108,8 @@ static noinline int gup_pte_range(pmd_t
static inline void get_head_page_multiple(struct page *page, int nr)
{
- VM_BUG_ON(page != compound_head(page));
- VM_BUG_ON(page_count(page) == 0);
+ VM_BUG_ON_PAGE(page != compound_head(page), page);
+ VM_BUG_ON_PAGE(page_count(page) == 0, page);
atomic_add(nr, &page->_count);
SetPageReferenced(page);
}
@@ -135,7 +135,7 @@ static noinline int gup_huge_pmd(pmd_t p
head = pte_page(pte);
page = head + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
do {
- VM_BUG_ON(compound_head(page) != head);
+ VM_BUG_ON_PAGE(compound_head(page) != head, page);
pages[*nr] = page;
if (PageTail(page))
get_huge_page_tail(page);
@@ -212,7 +212,7 @@ static noinline int gup_huge_pud(pud_t p
head = pte_page(pte);
page = head + ((addr & ~PUD_MASK) >> PAGE_SHIFT);
do {
- VM_BUG_ON(compound_head(page) != head);
+ VM_BUG_ON_PAGE(compound_head(page) != head, page);
pages[*nr] = page;
if (PageTail(page))
get_huge_page_tail(page);
diff -puN include/linux/hugetlb.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page include/linux/hugetlb.h
--- a/include/linux/hugetlb.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/include/linux/hugetlb.h
@@ -354,7 +354,7 @@ static inline pte_t arch_make_huge_pte(p
static inline struct hstate *page_hstate(struct page *page)
{
- VM_BUG_ON(!PageHuge(page));
+ VM_BUG_ON_PAGE(!PageHuge(page), page);
return size_to_hstate(PAGE_SIZE << compound_order(page));
}
diff -puN include/linux/hugetlb_cgroup.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page include/linux/hugetlb_cgroup.h
--- a/include/linux/hugetlb_cgroup.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/include/linux/hugetlb_cgroup.h
@@ -28,7 +28,7 @@ struct hugetlb_cgroup;
static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page)
{
- VM_BUG_ON(!PageHuge(page));
+ VM_BUG_ON_PAGE(!PageHuge(page), page);
if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER)
return NULL;
@@ -38,7 +38,7 @@ static inline struct hugetlb_cgroup *hug
static inline
int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg)
{
- VM_BUG_ON(!PageHuge(page));
+ VM_BUG_ON_PAGE(!PageHuge(page), page);
if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER)
return -1;
diff -puN include/linux/mm.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page include/linux/mm.h
--- a/include/linux/mm.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/include/linux/mm.h
@@ -303,7 +303,7 @@ static inline int get_freepage_migratety
*/
static inline int put_page_testzero(struct page *page)
{
- VM_BUG_ON(atomic_read(&page->_count) == 0);
+ VM_BUG_ON_PAGE(atomic_read(&page->_count) == 0, page);
return atomic_dec_and_test(&page->_count);
}
@@ -364,7 +364,7 @@ static inline int is_vmalloc_or_module_a
static inline void compound_lock(struct page *page)
{
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- VM_BUG_ON(PageSlab(page));
+ VM_BUG_ON_PAGE(PageSlab(page), page);
bit_spin_lock(PG_compound_lock, &page->flags);
#endif
}
@@ -372,7 +372,7 @@ static inline void compound_lock(struct
static inline void compound_unlock(struct page *page)
{
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- VM_BUG_ON(PageSlab(page));
+ VM_BUG_ON_PAGE(PageSlab(page), page);
bit_spin_unlock(PG_compound_lock, &page->flags);
#endif
}
@@ -447,7 +447,7 @@ static inline bool __compound_tail_refco
*/
static inline bool compound_tail_refcounted(struct page *page)
{
- VM_BUG_ON(!PageHead(page));
+ VM_BUG_ON_PAGE(!PageHead(page), page);
return __compound_tail_refcounted(page);
}
@@ -456,9 +456,9 @@ static inline void get_huge_page_tail(st
/*
* __split_huge_page_refcount() cannot run from under us.
*/
- VM_BUG_ON(!PageTail(page));
- VM_BUG_ON(page_mapcount(page) < 0);
- VM_BUG_ON(atomic_read(&page->_count) != 0);
+ VM_BUG_ON_PAGE(!PageTail(page), page);
+ VM_BUG_ON_PAGE(page_mapcount(page) < 0, page);
+ VM_BUG_ON_PAGE(atomic_read(&page->_count) != 0, page);
if (compound_tail_refcounted(page->first_page))
atomic_inc(&page->_mapcount);
}
@@ -474,7 +474,7 @@ static inline void get_page(struct page
* Getting a normal page or the head of a compound page
* requires to already have an elevated page->_count.
*/
- VM_BUG_ON(atomic_read(&page->_count) <= 0);
+ VM_BUG_ON_PAGE(atomic_read(&page->_count) <= 0, page);
atomic_inc(&page->_count);
}
@@ -511,13 +511,13 @@ static inline int PageBuddy(struct page
static inline void __SetPageBuddy(struct page *page)
{
- VM_BUG_ON(atomic_read(&page->_mapcount) != -1);
+ VM_BUG_ON_PAGE(atomic_read(&page->_mapcount) != -1, page);
atomic_set(&page->_mapcount, PAGE_BUDDY_MAPCOUNT_VALUE);
}
static inline void __ClearPageBuddy(struct page *page)
{
- VM_BUG_ON(!PageBuddy(page));
+ VM_BUG_ON_PAGE(!PageBuddy(page), page);
atomic_set(&page->_mapcount, -1);
}
@@ -1398,7 +1398,7 @@ static inline bool ptlock_init(struct pa
* slab code uses page->slab_cache and page->first_page (for tail
* pages), which share storage with page->ptl.
*/
- VM_BUG_ON(*(unsigned long *)&page->ptl);
+ VM_BUG_ON_PAGE(*(unsigned long *)&page->ptl, page);
if (!ptlock_alloc(page))
return false;
spin_lock_init(ptlock_ptr(page));
@@ -1489,7 +1489,7 @@ static inline bool pgtable_pmd_page_ctor
static inline void pgtable_pmd_page_dtor(struct page *page)
{
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
- VM_BUG_ON(page->pmd_huge_pte);
+ VM_BUG_ON_PAGE(page->pmd_huge_pte, page);
#endif
ptlock_free(page);
}
diff -puN include/linux/mmdebug.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page include/linux/mmdebug.h
--- a/include/linux/mmdebug.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/include/linux/mmdebug.h
@@ -3,8 +3,11 @@
#ifdef CONFIG_DEBUG_VM
#define VM_BUG_ON(cond) BUG_ON(cond)
+#define VM_BUG_ON_PAGE(cond, page) \
+ do { if (unlikely(cond)) { dump_page(page); BUG(); } } while(0)
#else
#define VM_BUG_ON(cond) BUILD_BUG_ON_INVALID(cond)
+#define VM_BUG_ON_PAGE(cond, page) VM_BUG_ON(cond)
#endif
#ifdef CONFIG_DEBUG_VIRTUAL
diff -puN include/linux/page-flags.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page include/linux/page-flags.h
--- a/include/linux/page-flags.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/include/linux/page-flags.h
@@ -412,7 +412,7 @@ static inline void ClearPageCompound(str
*/
static inline int PageTransHuge(struct page *page)
{
- VM_BUG_ON(PageTail(page));
+ VM_BUG_ON_PAGE(PageTail(page), page);
return PageHead(page);
}
@@ -460,25 +460,25 @@ static inline int PageTransTail(struct p
*/
static inline int PageSlabPfmemalloc(struct page *page)
{
- VM_BUG_ON(!PageSlab(page));
+ VM_BUG_ON_PAGE(!PageSlab(page), page);
return PageActive(page);
}
static inline void SetPageSlabPfmemalloc(struct page *page)
{
- VM_BUG_ON(!PageSlab(page));
+ VM_BUG_ON_PAGE(!PageSlab(page), page);
SetPageActive(page);
}
static inline void __ClearPageSlabPfmemalloc(struct page *page)
{
- VM_BUG_ON(!PageSlab(page));
+ VM_BUG_ON_PAGE(!PageSlab(page), page);
__ClearPageActive(page);
}
static inline void ClearPageSlabPfmemalloc(struct page *page)
{
- VM_BUG_ON(!PageSlab(page));
+ VM_BUG_ON_PAGE(!PageSlab(page), page);
ClearPageActive(page);
}
diff -puN include/linux/pagemap.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page include/linux/pagemap.h
--- a/include/linux/pagemap.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/include/linux/pagemap.h
@@ -162,7 +162,7 @@ static inline int page_cache_get_specula
* disabling preempt, and hence no need for the "speculative get" that
* SMP requires.
*/
- VM_BUG_ON(page_count(page) == 0);
+ VM_BUG_ON_PAGE(page_count(page) == 0, page);
atomic_inc(&page->_count);
#else
@@ -175,7 +175,7 @@ static inline int page_cache_get_specula
return 0;
}
#endif
- VM_BUG_ON(PageTail(page));
+ VM_BUG_ON_PAGE(PageTail(page), page);
return 1;
}
@@ -191,14 +191,14 @@ static inline int page_cache_add_specula
# ifdef CONFIG_PREEMPT_COUNT
VM_BUG_ON(!in_atomic());
# endif
- VM_BUG_ON(page_count(page) == 0);
+ VM_BUG_ON_PAGE(page_count(page) == 0, page);
atomic_add(count, &page->_count);
#else
if (unlikely(!atomic_add_unless(&page->_count, count, 0)))
return 0;
#endif
- VM_BUG_ON(PageCompound(page) && page != compound_head(page));
+ VM_BUG_ON_PAGE(PageCompound(page) && page != compound_head(page), page);
return 1;
}
@@ -210,7 +210,7 @@ static inline int page_freeze_refs(struc
static inline void page_unfreeze_refs(struct page *page, int count)
{
- VM_BUG_ON(page_count(page) != 0);
+ VM_BUG_ON_PAGE(page_count(page) != 0, page);
VM_BUG_ON(count == 0);
atomic_set(&page->_count, count);
diff -puN mm/cleancache.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/cleancache.c
--- a/mm/cleancache.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/cleancache.c
@@ -237,7 +237,7 @@ int __cleancache_get_page(struct page *p
goto out;
}
- VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
fake_pool_id = page->mapping->host->i_sb->cleancache_poolid;
if (fake_pool_id < 0)
goto out;
@@ -279,7 +279,7 @@ void __cleancache_put_page(struct page *
return;
}
- VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
fake_pool_id = page->mapping->host->i_sb->cleancache_poolid;
if (fake_pool_id < 0)
return;
@@ -318,7 +318,7 @@ void __cleancache_invalidate_page(struct
if (pool_id < 0)
return;
- VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
if (cleancache_get_key(mapping->host, &key) >= 0) {
cleancache_ops->invalidate_page(pool_id,
key, page->index);
diff -puN mm/compaction.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/compaction.c
--- a/mm/compaction.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/compaction.c
@@ -601,7 +601,7 @@ isolate_migratepages_range(struct zone *
if (__isolate_lru_page(page, mode) != 0)
continue;
- VM_BUG_ON(PageTransCompound(page));
+ VM_BUG_ON_PAGE(PageTransCompound(page), page);
/* Successfully isolated */
cc->finished_update_migrate = true;
diff -puN mm/filemap.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/filemap.c
--- a/mm/filemap.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/filemap.c
@@ -409,9 +409,9 @@ int replace_page_cache_page(struct page
{
int error;
- VM_BUG_ON(!PageLocked(old));
- VM_BUG_ON(!PageLocked(new));
- VM_BUG_ON(new->mapping);
+ VM_BUG_ON_PAGE(!PageLocked(old), old);
+ VM_BUG_ON_PAGE(!PageLocked(new), new);
+ VM_BUG_ON_PAGE(new->mapping, new);
error = radix_tree_preload(gfp_mask & ~__GFP_HIGHMEM);
if (!error) {
@@ -461,8 +461,8 @@ int add_to_page_cache_locked(struct page
{
int error;
- VM_BUG_ON(!PageLocked(page));
- VM_BUG_ON(PageSwapBacked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
+ VM_BUG_ON_PAGE(PageSwapBacked(page), page);
error = mem_cgroup_cache_charge(page, current->mm,
gfp_mask & GFP_RECLAIM_MASK);
@@ -607,7 +607,7 @@ EXPORT_SYMBOL_GPL(add_page_wait_queue);
*/
void unlock_page(struct page *page)
{
- VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
clear_bit_unlock(PG_locked, &page->flags);
smp_mb__after_clear_bit();
wake_up_page(page, PG_locked);
@@ -760,7 +760,7 @@ repeat:
page_cache_release(page);
goto repeat;
}
- VM_BUG_ON(page->index != offset);
+ VM_BUG_ON_PAGE(page->index != offset, page);
}
return page;
}
@@ -1656,7 +1656,7 @@ retry_find:
put_page(page);
goto retry_find;
}
- VM_BUG_ON(page->index != offset);
+ VM_BUG_ON_PAGE(page->index != offset, page);
/*
* We have a locked page in the page cache, now we need to check
diff -puN mm/huge_memory.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/huge_memory.c
--- a/mm/huge_memory.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/huge_memory.c
@@ -712,7 +712,7 @@ static int __do_huge_pmd_anonymous_page(
pgtable_t pgtable;
spinlock_t *ptl;
- VM_BUG_ON(!PageCompound(page));
+ VM_BUG_ON_PAGE(!PageCompound(page), page);
pgtable = pte_alloc_one(mm, haddr);
if (unlikely(!pgtable))
return VM_FAULT_OOM;
@@ -893,7 +893,7 @@ int copy_huge_pmd(struct mm_struct *dst_
goto out;
}
src_page = pmd_page(pmd);
- VM_BUG_ON(!PageHead(src_page));
+ VM_BUG_ON_PAGE(!PageHead(src_page), src_page);
get_page(src_page);
page_dup_rmap(src_page);
add_mm_counter(dst_mm, MM_ANONPAGES, HPAGE_PMD_NR);
@@ -1067,7 +1067,7 @@ static int do_huge_pmd_wp_page_fallback(
ptl = pmd_lock(mm, pmd);
if (unlikely(!pmd_same(*pmd, orig_pmd)))
goto out_free_pages;
- VM_BUG_ON(!PageHead(page));
+ VM_BUG_ON_PAGE(!PageHead(page), page);
pmdp_clear_flush(vma, haddr, pmd);
/* leave pmd empty until pte is filled */
@@ -1133,7 +1133,7 @@ int do_huge_pmd_wp_page(struct mm_struct
goto out_unlock;
page = pmd_page(orig_pmd);
- VM_BUG_ON(!PageCompound(page) || !PageHead(page));
+ VM_BUG_ON_PAGE(!PageCompound(page) || !PageHead(page), page);
if (page_mapcount(page) == 1) {
pmd_t entry;
entry = pmd_mkyoung(orig_pmd);
@@ -1211,7 +1211,7 @@ alloc:
add_mm_counter(mm, MM_ANONPAGES, HPAGE_PMD_NR);
put_huge_zero_page();
} else {
- VM_BUG_ON(!PageHead(page));
+ VM_BUG_ON_PAGE(!PageHead(page), page);
page_remove_rmap(page);
put_page(page);
}
@@ -1249,7 +1249,7 @@ struct page *follow_trans_huge_pmd(struc
goto out;
page = pmd_page(*pmd);
- VM_BUG_ON(!PageHead(page));
+ VM_BUG_ON_PAGE(!PageHead(page), page);
if (flags & FOLL_TOUCH) {
pmd_t _pmd;
/*
@@ -1274,7 +1274,7 @@ struct page *follow_trans_huge_pmd(struc
}
}
page += (addr & ~HPAGE_PMD_MASK) >> PAGE_SHIFT;
- VM_BUG_ON(!PageCompound(page));
+ VM_BUG_ON_PAGE(!PageCompound(page), page);
if (flags & FOLL_GET)
get_page_foll(page);
@@ -1432,9 +1432,9 @@ int zap_huge_pmd(struct mmu_gather *tlb,
} else {
page = pmd_page(orig_pmd);
page_remove_rmap(page);
- VM_BUG_ON(page_mapcount(page) < 0);
+ VM_BUG_ON_PAGE(page_mapcount(page) < 0, page);
add_mm_counter(tlb->mm, MM_ANONPAGES, -HPAGE_PMD_NR);
- VM_BUG_ON(!PageHead(page));
+ VM_BUG_ON_PAGE(!PageHead(page), page);
atomic_long_dec(&tlb->mm->nr_ptes);
spin_unlock(ptl);
tlb_remove_page(tlb, page);
@@ -2176,9 +2176,9 @@ static int __collapse_huge_page_isolate(
if (unlikely(!page))
goto out;
- VM_BUG_ON(PageCompound(page));
- BUG_ON(!PageAnon(page));
- VM_BUG_ON(!PageSwapBacked(page));
+ VM_BUG_ON_PAGE(PageCompound(page), page);
+ VM_BUG_ON_PAGE(!PageAnon(page), page);
+ VM_BUG_ON_PAGE(!PageSwapBacked(page), page);
/* cannot use mapcount: can't collapse if there's a gup pin */
if (page_count(page) != 1)
@@ -2201,8 +2201,8 @@ static int __collapse_huge_page_isolate(
}
/* 0 stands for page_is_file_cache(page) == false */
inc_zone_page_state(page, NR_ISOLATED_ANON + 0);
- VM_BUG_ON(!PageLocked(page));
- VM_BUG_ON(PageLRU(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
+ VM_BUG_ON_PAGE(PageLRU(page), page);
/* If there is no mapped pte young don't collapse the page */
if (pte_young(pteval) || PageReferenced(page) ||
@@ -2232,7 +2232,7 @@ static void __collapse_huge_page_copy(pt
} else {
src_page = pte_page(pteval);
copy_user_highpage(page, src_page, address, vma);
- VM_BUG_ON(page_mapcount(src_page) != 1);
+ VM_BUG_ON_PAGE(page_mapcount(src_page) != 1, src_page);
release_pte_page(src_page);
/*
* ptl mostly unnecessary, but preempt has to
@@ -2311,7 +2311,7 @@ static struct page
struct vm_area_struct *vma, unsigned long address,
int node)
{
- VM_BUG_ON(*hpage);
+ VM_BUG_ON_PAGE(*hpage, *hpage);
/*
* Allocate the page while the vma is still valid and under
* the mmap_sem read mode so there is no memory allocation
@@ -2580,7 +2580,7 @@ static int khugepaged_scan_pmd(struct mm
*/
node = page_to_nid(page);
khugepaged_node_load[node]++;
- VM_BUG_ON(PageCompound(page));
+ VM_BUG_ON_PAGE(PageCompound(page), page);
if (!PageLRU(page) || PageLocked(page) || !PageAnon(page))
goto out_unmap;
/* cannot use mapcount: can't collapse if there's a gup pin */
@@ -2876,7 +2876,7 @@ again:
return;
}
page = pmd_page(*pmd);
- VM_BUG_ON(!page_count(page));
+ VM_BUG_ON_PAGE(!page_count(page), page);
get_page(page);
spin_unlock(ptl);
mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
diff -puN mm/hugetlb.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/hugetlb.c
--- a/mm/hugetlb.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/hugetlb.c
@@ -584,7 +584,7 @@ static void update_and_free_page(struct
1 << PG_active | 1 << PG_reserved |
1 << PG_private | 1 << PG_writeback);
}
- VM_BUG_ON(hugetlb_cgroup_from_page(page));
+ VM_BUG_ON_PAGE(hugetlb_cgroup_from_page(page), page);
set_compound_page_dtor(page, NULL);
set_page_refcounted(page);
arch_release_hugepage(page);
@@ -1089,7 +1089,7 @@ retry:
* no users -- drop the buddy allocator's reference.
*/
put_page_testzero(page);
- VM_BUG_ON(page_count(page));
+ VM_BUG_ON_PAGE(page_count(page), page);
enqueue_huge_page(h, page);
}
free:
@@ -3503,7 +3503,7 @@ int dequeue_hwpoisoned_huge_page(struct
bool isolate_huge_page(struct page *page, struct list_head *list)
{
- VM_BUG_ON(!PageHead(page));
+ VM_BUG_ON_PAGE(!PageHead(page), page);
if (!get_page_unless_zero(page))
return false;
spin_lock(&hugetlb_lock);
@@ -3514,7 +3514,7 @@ bool isolate_huge_page(struct page *page
void putback_active_hugepage(struct page *page)
{
- VM_BUG_ON(!PageHead(page));
+ VM_BUG_ON_PAGE(!PageHead(page), page);
spin_lock(&hugetlb_lock);
list_move_tail(&page->lru, &(page_hstate(page))->hugepage_activelist);
spin_unlock(&hugetlb_lock);
@@ -3523,7 +3523,7 @@ void putback_active_hugepage(struct page
bool is_hugepage_active(struct page *page)
{
- VM_BUG_ON(!PageHuge(page));
+ VM_BUG_ON_PAGE(!PageHuge(page), page);
/*
* This function can be called for a tail page because the caller,
* scan_movable_pages, scans through a given pfn-range which typically
diff -puN mm/hugetlb_cgroup.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/hugetlb_cgroup.c
--- a/mm/hugetlb_cgroup.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/hugetlb_cgroup.c
@@ -396,7 +396,7 @@ void hugetlb_cgroup_migrate(struct page
if (hugetlb_cgroup_disabled())
return;
- VM_BUG_ON(!PageHuge(oldhpage));
+ VM_BUG_ON_PAGE(!PageHuge(oldhpage), oldhpage);
spin_lock(&hugetlb_lock);
h_cg = hugetlb_cgroup_from_page(oldhpage);
set_hugetlb_cgroup(oldhpage, NULL);
diff -puN mm/internal.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/internal.h
--- a/mm/internal.h~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/internal.h
@@ -27,8 +27,8 @@ static inline void set_page_count(struct
*/
static inline void set_page_refcounted(struct page *page)
{
- VM_BUG_ON(PageTail(page));
- VM_BUG_ON(atomic_read(&page->_count));
+ VM_BUG_ON_PAGE(PageTail(page), page);
+ VM_BUG_ON_PAGE(atomic_read(&page->_count), page);
set_page_count(page, 1);
}
@@ -46,7 +46,7 @@ static inline void __get_page_tail_foll(
* speculative page access (like in
* page_cache_get_speculative()) on tail pages.
*/
- VM_BUG_ON(atomic_read(&page->first_page->_count) <= 0);
+ VM_BUG_ON_PAGE(atomic_read(&page->first_page->_count) <= 0, page);
if (get_page_head)
atomic_inc(&page->first_page->_count);
get_huge_page_tail(page);
@@ -71,7 +71,7 @@ static inline void get_page_foll(struct
* Getting a normal page or the head of a compound page
* requires to already have an elevated page->_count.
*/
- VM_BUG_ON(atomic_read(&page->_count) <= 0);
+ VM_BUG_ON_PAGE(atomic_read(&page->_count) <= 0, page);
atomic_inc(&page->_count);
}
}
@@ -173,7 +173,7 @@ static inline void munlock_vma_pages_all
static inline int mlocked_vma_newpage(struct vm_area_struct *vma,
struct page *page)
{
- VM_BUG_ON(PageLRU(page));
+ VM_BUG_ON_PAGE(PageLRU(page), page);
if (likely((vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) != VM_LOCKED))
return 0;
diff -puN mm/ksm.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/ksm.c
--- a/mm/ksm.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/ksm.c
@@ -1898,13 +1898,13 @@ int rmap_walk_ksm(struct page *page, str
int ret = SWAP_AGAIN;
int search_new_forks = 0;
- VM_BUG_ON(!PageKsm(page));
+ VM_BUG_ON_PAGE(!PageKsm(page), page);
/*
* Rely on the page lock to protect against concurrent modifications
* to that page's node of the stable tree.
*/
- VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
stable_node = page_stable_node(page);
if (!stable_node)
@@ -1958,13 +1958,13 @@ void ksm_migrate_page(struct page *newpa
{
struct stable_node *stable_node;
- VM_BUG_ON(!PageLocked(oldpage));
- VM_BUG_ON(!PageLocked(newpage));
- VM_BUG_ON(newpage->mapping != oldpage->mapping);
+ VM_BUG_ON_PAGE(!PageLocked(oldpage), oldpage);
+ VM_BUG_ON_PAGE(!PageLocked(newpage), newpage);
+ VM_BUG_ON_PAGE(newpage->mapping != oldpage->mapping, newpage);
stable_node = page_stable_node(newpage);
if (stable_node) {
- VM_BUG_ON(stable_node->kpfn != page_to_pfn(oldpage));
+ VM_BUG_ON_PAGE(stable_node->kpfn != page_to_pfn(oldpage), oldpage);
stable_node->kpfn = page_to_pfn(newpage);
/*
* newpage->mapping was set in advance; now we need smp_wmb()
diff -puN mm/memcontrol.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/memcontrol.c
--- a/mm/memcontrol.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/memcontrol.c
@@ -2856,7 +2856,7 @@ struct mem_cgroup *try_get_mem_cgroup_fr
unsigned short id;
swp_entry_t ent;
- VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
pc = lookup_page_cgroup(page);
lock_page_cgroup(pc);
@@ -2890,7 +2890,7 @@ static void __mem_cgroup_commit_charge(s
bool anon;
lock_page_cgroup(pc);
- VM_BUG_ON(PageCgroupUsed(pc));
+ VM_BUG_ON_PAGE(PageCgroupUsed(pc), page);
/*
* we don't need page_cgroup_lock about tail pages, becase they are not
* accessed by any other context at this point.
@@ -2925,7 +2925,7 @@ static void __mem_cgroup_commit_charge(s
if (lrucare) {
if (was_on_lru) {
lruvec = mem_cgroup_zone_lruvec(zone, pc->mem_cgroup);
- VM_BUG_ON(PageLRU(page));
+ VM_BUG_ON_PAGE(PageLRU(page), page);
SetPageLRU(page);
add_page_to_lru_list(page, lruvec, page_lru(page));
}
@@ -3740,7 +3740,7 @@ void __memcg_kmem_uncharge_pages(struct
if (!memcg)
return;
- VM_BUG_ON(mem_cgroup_is_root(memcg));
+ VM_BUG_ON_PAGE(mem_cgroup_is_root(memcg), page);
memcg_uncharge_kmem(memcg, PAGE_SIZE << order);
}
#else
@@ -3819,7 +3819,7 @@ static int mem_cgroup_move_account(struc
bool anon = PageAnon(page);
VM_BUG_ON(from == to);
- VM_BUG_ON(PageLRU(page));
+ VM_BUG_ON_PAGE(PageLRU(page), page);
/*
* The page is isolated from LRU. So, collapse function
* will not handle this page. But page splitting can happen.
@@ -3912,7 +3912,7 @@ static int mem_cgroup_move_parent(struct
parent = root_mem_cgroup;
if (nr_pages > 1) {
- VM_BUG_ON(!PageTransHuge(page));
+ VM_BUG_ON_PAGE(!PageTransHuge(page), page);
flags = compound_lock_irqsave(page);
}
@@ -3946,7 +3946,7 @@ static int mem_cgroup_charge_common(stru
if (PageTransHuge(page)) {
nr_pages <<= compound_order(page);
- VM_BUG_ON(!PageTransHuge(page));
+ VM_BUG_ON_PAGE(!PageTransHuge(page), page);
/*
* Never OOM-kill a process for a huge page. The
* fault handler will fall back to regular pages.
@@ -3966,8 +3966,8 @@ int mem_cgroup_newpage_charge(struct pag
{
if (mem_cgroup_disabled())
return 0;
- VM_BUG_ON(page_mapped(page));
- VM_BUG_ON(page->mapping && !PageAnon(page));
+ VM_BUG_ON_PAGE(page_mapped(page), page);
+ VM_BUG_ON_PAGE(page->mapping && !PageAnon(page), page);
VM_BUG_ON(!mm);
return mem_cgroup_charge_common(page, mm, gfp_mask,
MEM_CGROUP_CHARGE_TYPE_ANON);
@@ -4171,7 +4171,7 @@ __mem_cgroup_uncharge_common(struct page
if (PageTransHuge(page)) {
nr_pages <<= compound_order(page);
- VM_BUG_ON(!PageTransHuge(page));
+ VM_BUG_ON_PAGE(!PageTransHuge(page), page);
}
/*
* Check if our page_cgroup is valid
@@ -4263,7 +4263,7 @@ void mem_cgroup_uncharge_page(struct pag
/* early check. */
if (page_mapped(page))
return;
- VM_BUG_ON(page->mapping && !PageAnon(page));
+ VM_BUG_ON_PAGE(page->mapping && !PageAnon(page), page);
/*
* If the page is in swap cache, uncharge should be deferred
* to the swap path, which also properly accounts swap usage
@@ -4283,8 +4283,8 @@ void mem_cgroup_uncharge_page(struct pag
void mem_cgroup_uncharge_cache_page(struct page *page)
{
- VM_BUG_ON(page_mapped(page));
- VM_BUG_ON(page->mapping);
+ VM_BUG_ON_PAGE(page_mapped(page), page);
+ VM_BUG_ON_PAGE(page->mapping, page);
__mem_cgroup_uncharge_common(page, MEM_CGROUP_CHARGE_TYPE_CACHE, false);
}
@@ -6602,7 +6602,7 @@ static enum mc_target_type get_mctgt_typ
enum mc_target_type ret = MC_TARGET_NONE;
page = pmd_page(pmd);
- VM_BUG_ON(!page || !PageHead(page));
+ VM_BUG_ON_PAGE(!page || !PageHead(page), page);
if (!move_anon())
return ret;
pc = lookup_page_cgroup(page);
diff -puN mm/memory.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/memory.c
--- a/mm/memory.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/memory.c
@@ -288,7 +288,7 @@ int __tlb_remove_page(struct mmu_gather
return 0;
batch = tlb->active;
}
- VM_BUG_ON(batch->nr > batch->max);
+ VM_BUG_ON_PAGE(batch->nr > batch->max, page);
return batch->max - batch->nr;
}
@@ -2699,7 +2699,7 @@ static int do_wp_page(struct mm_struct *
goto unwritable_page;
}
} else
- VM_BUG_ON(!PageLocked(old_page));
+ VM_BUG_ON_PAGE(!PageLocked(old_page), old_page);
/*
* Since we dropped the lock we need to revalidate
@@ -3355,7 +3355,7 @@ static int __do_fault(struct mm_struct *
if (unlikely(!(ret & VM_FAULT_LOCKED)))
lock_page(vmf.page);
else
- VM_BUG_ON(!PageLocked(vmf.page));
+ VM_BUG_ON_PAGE(!PageLocked(vmf.page), vmf.page);
/*
* Should we do an early C-O-W break?
@@ -3392,7 +3392,7 @@ static int __do_fault(struct mm_struct *
goto unwritable_page;
}
} else
- VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
page_mkwrite = 1;
}
}
diff -puN mm/migrate.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/migrate.c
--- a/mm/migrate.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/migrate.c
@@ -499,7 +499,7 @@ void migrate_page_copy(struct page *newp
if (PageUptodate(page))
SetPageUptodate(newpage);
if (TestClearPageActive(page)) {
- VM_BUG_ON(PageUnevictable(page));
+ VM_BUG_ON_PAGE(PageUnevictable(page), page);
SetPageActive(newpage);
} else if (TestClearPageUnevictable(page))
SetPageUnevictable(newpage);
@@ -871,7 +871,7 @@ static int __unmap_and_move(struct page
* free the metadata, so the page can be freed.
*/
if (!page->mapping) {
- VM_BUG_ON(PageAnon(page));
+ VM_BUG_ON_PAGE(PageAnon(page), page);
if (page_has_private(page)) {
try_to_free_buffers(page);
goto uncharge;
@@ -1618,7 +1618,7 @@ static int numamigrate_isolate_page(pg_d
{
int page_lru;
- VM_BUG_ON(compound_order(page) && !PageTransHuge(page));
+ VM_BUG_ON_PAGE(compound_order(page) && !PageTransHuge(page), page);
/* Avoid migrating to a node that is nearly full */
if (!migrate_balanced_pgdat(pgdat, 1UL << compound_order(page)))
diff -puN mm/mlock.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/mlock.c
--- a/mm/mlock.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/mlock.c
@@ -277,8 +277,8 @@ static int __mlock_posix_error_return(lo
static bool __putback_lru_fast_prepare(struct page *page, struct pagevec *pvec,
int *pgrescued)
{
- VM_BUG_ON(PageLRU(page));
- VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON_PAGE(PageLRU(page), page);
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
if (page_mapcount(page) <= 1 && page_evictable(page)) {
pagevec_add(pvec, page);
diff -puN mm/page_alloc.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/page_alloc.c
--- a/mm/page_alloc.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/page_alloc.c
@@ -509,12 +509,12 @@ static inline int page_is_buddy(struct p
return 0;
if (page_is_guard(buddy) && page_order(buddy) == order) {
- VM_BUG_ON(page_count(buddy) != 0);
+ VM_BUG_ON_PAGE(page_count(buddy) != 0, buddy);
return 1;
}
if (PageBuddy(buddy) && page_order(buddy) == order) {
- VM_BUG_ON(page_count(buddy) != 0);
+ VM_BUG_ON_PAGE(page_count(buddy) != 0, buddy);
return 1;
}
return 0;
@@ -564,8 +564,8 @@ static inline void __free_one_page(struc
page_idx = page_to_pfn(page) & ((1 << MAX_ORDER) - 1);
- VM_BUG_ON(page_idx & ((1 << order) - 1));
- VM_BUG_ON(bad_range(zone, page));
+ VM_BUG_ON_PAGE(page_idx & ((1 << order) - 1), page);
+ VM_BUG_ON_PAGE(bad_range(zone, page), page);
while (order < MAX_ORDER-1) {
buddy_idx = __find_buddy_index(page_idx, order);
@@ -827,7 +827,7 @@ static inline void expand(struct zone *z
area--;
high--;
size >>= 1;
- VM_BUG_ON(bad_range(zone, &page[size]));
+ VM_BUG_ON_PAGE(bad_range(zone, &page[size]), &page[size]);
#ifdef CONFIG_DEBUG_PAGEALLOC
if (high < debug_guardpage_minorder()) {
@@ -980,7 +980,7 @@ int move_freepages(struct zone *zone,
for (page = start_page; page <= end_page;) {
/* Make sure we are not inadvertently changing nodes */
- VM_BUG_ON(page_to_nid(page) != zone_to_nid(zone));
+ VM_BUG_ON_PAGE(page_to_nid(page) != zone_to_nid(zone), page);
if (!pfn_valid_within(page_to_pfn(page))) {
page++;
@@ -1429,8 +1429,8 @@ void split_page(struct page *page, unsig
{
int i;
- VM_BUG_ON(PageCompound(page));
- VM_BUG_ON(!page_count(page));
+ VM_BUG_ON_PAGE(PageCompound(page), page);
+ VM_BUG_ON_PAGE(!page_count(page), page);
#ifdef CONFIG_KMEMCHECK
/*
@@ -1577,7 +1577,7 @@ again:
zone_statistics(preferred_zone, zone, gfp_flags);
local_irq_restore(flags);
- VM_BUG_ON(bad_range(zone, page));
+ VM_BUG_ON_PAGE(bad_range(zone, page), page);
if (prep_new_page(page, order, gfp_flags))
goto again;
return page;
@@ -6026,7 +6026,7 @@ void set_pageblock_flags_group(struct pa
pfn = page_to_pfn(page);
bitmap = get_pageblock_bitmap(zone, pfn);
bitidx = pfn_to_bitidx(zone, pfn);
- VM_BUG_ON(!zone_spans_pfn(zone, pfn));
+ VM_BUG_ON_PAGE(!zone_spans_pfn(zone, pfn), page);
for (; start_bitidx <= end_bitidx; start_bitidx++, value <<= 1)
if (flags & value)
@@ -6544,4 +6544,4 @@ void dump_page(struct page *page, char *
{
dump_page_badflags(page, reason, 0);
}
-
+EXPORT_SYMBOL_GPL(dump_page);
diff -puN mm/page_io.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/page_io.c
--- a/mm/page_io.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/page_io.c
@@ -320,8 +320,8 @@ int swap_readpage(struct page *page)
int ret = 0;
struct swap_info_struct *sis = page_swap_info(page);
- VM_BUG_ON(!PageLocked(page));
- VM_BUG_ON(PageUptodate(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
+ VM_BUG_ON_PAGE(PageUptodate(page), page);
if (frontswap_load(page) == 0) {
SetPageUptodate(page);
unlock_page(page);
diff -puN mm/rmap.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/rmap.c
--- a/mm/rmap.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/rmap.c
@@ -894,9 +894,9 @@ void page_move_anon_rmap(struct page *pa
{
struct anon_vma *anon_vma = vma->anon_vma;
- VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
VM_BUG_ON(!anon_vma);
- VM_BUG_ON(page->index != linear_page_index(vma, address));
+ VM_BUG_ON_PAGE(page->index != linear_page_index(vma, address), page);
anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON;
page->mapping = (struct address_space *) anon_vma;
@@ -995,7 +995,7 @@ void do_page_add_anon_rmap(struct page *
if (unlikely(PageKsm(page)))
return;
- VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
/* address might be in next vma when migration races vma_adjust */
if (first)
__page_set_anon_rmap(page, vma, address, exclusive);
@@ -1481,7 +1481,7 @@ int try_to_unmap(struct page *page, enum
.anon_lock = page_lock_anon_vma_read,
};
- VM_BUG_ON(!PageHuge(page) && PageTransHuge(page));
+ VM_BUG_ON_PAGE(!PageHuge(page) && PageTransHuge(page), page);
/*
* During exec, a temporary VMA is setup and later moved.
@@ -1533,7 +1533,7 @@ int try_to_munlock(struct page *page)
};
- VM_BUG_ON(!PageLocked(page) || PageLRU(page));
+ VM_BUG_ON_PAGE(!PageLocked(page) || PageLRU(page), page);
ret = rmap_walk(page, &rwc);
return ret;
diff -puN mm/shmem.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/shmem.c
--- a/mm/shmem.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/shmem.c
@@ -285,8 +285,8 @@ static int shmem_add_to_page_cache(struc
{
int error;
- VM_BUG_ON(!PageLocked(page));
- VM_BUG_ON(!PageSwapBacked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
+ VM_BUG_ON_PAGE(!PageSwapBacked(page), page);
page_cache_get(page);
page->mapping = mapping;
@@ -491,7 +491,7 @@ static void shmem_undo_range(struct inod
continue;
if (!unfalloc || !PageUptodate(page)) {
if (page->mapping == mapping) {
- VM_BUG_ON(PageWriteback(page));
+ VM_BUG_ON_PAGE(PageWriteback(page), page);
truncate_inode_page(mapping, page);
}
}
@@ -568,7 +568,7 @@ static void shmem_undo_range(struct inod
lock_page(page);
if (!unfalloc || !PageUptodate(page)) {
if (page->mapping == mapping) {
- VM_BUG_ON(PageWriteback(page));
+ VM_BUG_ON_PAGE(PageWriteback(page), page);
truncate_inode_page(mapping, page);
}
}
diff -puN mm/slub.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/slub.c
--- a/mm/slub.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/slub.c
@@ -1559,7 +1559,7 @@ static inline void *acquire_slab(struct
new.freelist = freelist;
}
- VM_BUG_ON(new.frozen);
+ VM_BUG_ON_PAGE(new.frozen, &new);
new.frozen = 1;
if (!__cmpxchg_double_slab(s, page,
@@ -1812,7 +1812,7 @@ static void deactivate_slab(struct kmem_
set_freepointer(s, freelist, prior);
new.counters = counters;
new.inuse--;
- VM_BUG_ON(!new.frozen);
+ VM_BUG_ON_PAGE(!new.frozen, &new);
} while (!__cmpxchg_double_slab(s, page,
prior, counters,
@@ -1840,7 +1840,7 @@ redo:
old.freelist = page->freelist;
old.counters = page->counters;
- VM_BUG_ON(!old.frozen);
+ VM_BUG_ON_PAGE(!old.frozen, &old);
/* Determine target state of the slab */
new.counters = old.counters;
@@ -1952,7 +1952,7 @@ static void unfreeze_partials(struct kme
old.freelist = page->freelist;
old.counters = page->counters;
- VM_BUG_ON(!old.frozen);
+ VM_BUG_ON_PAGE(!old.frozen, &old);
new.counters = old.counters;
new.freelist = old.freelist;
@@ -2225,7 +2225,7 @@ static inline void *get_freelist(struct
counters = page->counters;
new.counters = counters;
- VM_BUG_ON(!new.frozen);
+ VM_BUG_ON_PAGE(!new.frozen, &new);
new.inuse = page->objects;
new.frozen = freelist != NULL;
@@ -2319,7 +2319,7 @@ load_freelist:
* page is pointing to the page from which the objects are obtained.
* That page must be frozen for per cpu allocations to work.
*/
- VM_BUG_ON(!c->page->frozen);
+ VM_BUG_ON_PAGE(!c->page->frozen, c->page);
c->freelist = get_freepointer(s, freelist);
c->tid = next_tid(c->tid);
local_irq_restore(flags);
diff -puN mm/swap.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/swap.c
--- a/mm/swap.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/swap.c
@@ -57,7 +57,7 @@ static void __page_cache_release(struct
spin_lock_irqsave(&zone->lru_lock, flags);
lruvec = mem_cgroup_page_lruvec(page, zone);
- VM_BUG_ON(!PageLRU(page));
+ VM_BUG_ON_PAGE(!PageLRU(page), page);
__ClearPageLRU(page);
del_page_from_lru_list(page, lruvec, page_off_lru(page));
spin_unlock_irqrestore(&zone->lru_lock, flags);
@@ -130,8 +130,8 @@ static void put_compound_page(struct pag
* __split_huge_page_refcount cannot race
* here.
*/
- VM_BUG_ON(!PageHead(page_head));
- VM_BUG_ON(page_mapcount(page) != 0);
+ VM_BUG_ON_PAGE(!PageHead(page_head), page_head);
+ VM_BUG_ON_PAGE(page_mapcount(page) != 0, page);
if (put_page_testzero(page_head)) {
/*
* If this is the tail of a slab
@@ -148,7 +148,7 @@ static void put_compound_page(struct pag
* the compound page enters the buddy
* allocator.
*/
- VM_BUG_ON(PageSlab(page_head));
+ VM_BUG_ON_PAGE(PageSlab(page_head), page_head);
__put_compound_page(page_head);
}
return;
@@ -199,7 +199,7 @@ out_put_single:
__put_single_page(page);
return;
}
- VM_BUG_ON(page_head != page->first_page);
+ VM_BUG_ON_PAGE(page_head != page->first_page, page);
/*
* We can release the refcount taken by
* get_page_unless_zero() now that
@@ -207,12 +207,12 @@ out_put_single:
* compound_lock.
*/
if (put_page_testzero(page_head))
- VM_BUG_ON(1);
+ VM_BUG_ON_PAGE(1, page_head);
/* __split_huge_page_refcount will wait now */
- VM_BUG_ON(page_mapcount(page) <= 0);
+ VM_BUG_ON_PAGE(page_mapcount(page) <= 0, page);
atomic_dec(&page->_mapcount);
- VM_BUG_ON(atomic_read(&page_head->_count) <= 0);
- VM_BUG_ON(atomic_read(&page->_count) != 0);
+ VM_BUG_ON_PAGE(atomic_read(&page_head->_count) <= 0, page_head);
+ VM_BUG_ON_PAGE(atomic_read(&page->_count) != 0, page);
compound_unlock_irqrestore(page_head, flags);
if (put_page_testzero(page_head)) {
@@ -223,7 +223,7 @@ out_put_single:
}
} else {
/* page_head is a dangling pointer */
- VM_BUG_ON(PageTail(page));
+ VM_BUG_ON_PAGE(PageTail(page), page);
goto out_put_single;
}
}
@@ -264,7 +264,7 @@ bool __get_page_tail(struct page *page)
* page. __split_huge_page_refcount
* cannot race here.
*/
- VM_BUG_ON(!PageHead(page_head));
+ VM_BUG_ON_PAGE(!PageHead(page_head), page_head);
__get_page_tail_foll(page, true);
return true;
} else {
@@ -604,8 +604,8 @@ EXPORT_SYMBOL(__lru_cache_add);
*/
void lru_cache_add(struct page *page)
{
- VM_BUG_ON(PageActive(page) && PageUnevictable(page));
- VM_BUG_ON(PageLRU(page));
+ VM_BUG_ON_PAGE(PageActive(page) && PageUnevictable(page), page);
+ VM_BUG_ON_PAGE(PageLRU(page), page);
__lru_cache_add(page);
}
@@ -846,7 +846,7 @@ void release_pages(struct page **pages,
}
lruvec = mem_cgroup_page_lruvec(page, zone);
- VM_BUG_ON(!PageLRU(page));
+ VM_BUG_ON_PAGE(!PageLRU(page), page);
__ClearPageLRU(page);
del_page_from_lru_list(page, lruvec, page_off_lru(page));
}
@@ -888,9 +888,9 @@ void lru_add_page_tail(struct page *page
{
const int file = 0;
- VM_BUG_ON(!PageHead(page));
- VM_BUG_ON(PageCompound(page_tail));
- VM_BUG_ON(PageLRU(page_tail));
+ VM_BUG_ON_PAGE(!PageHead(page), page);
+ VM_BUG_ON_PAGE(PageCompound(page_tail), page);
+ VM_BUG_ON_PAGE(PageLRU(page_tail), page);
VM_BUG_ON(NR_CPUS != 1 &&
!spin_is_locked(&lruvec_zone(lruvec)->lru_lock));
@@ -929,7 +929,7 @@ static void __pagevec_lru_add_fn(struct
int active = PageActive(page);
enum lru_list lru = page_lru(page);
- VM_BUG_ON(PageLRU(page));
+ VM_BUG_ON_PAGE(PageLRU(page), page);
SetPageLRU(page);
add_page_to_lru_list(page, lruvec, lru);
diff -puN mm/swap_state.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/swap_state.c
--- a/mm/swap_state.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/swap_state.c
@@ -83,9 +83,9 @@ int __add_to_swap_cache(struct page *pag
int error;
struct address_space *address_space;
- VM_BUG_ON(!PageLocked(page));
- VM_BUG_ON(PageSwapCache(page));
- VM_BUG_ON(!PageSwapBacked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
+ VM_BUG_ON_PAGE(PageSwapCache(page), page);
+ VM_BUG_ON_PAGE(!PageSwapBacked(page), page);
page_cache_get(page);
SetPageSwapCache(page);
@@ -139,9 +139,9 @@ void __delete_from_swap_cache(struct pag
swp_entry_t entry;
struct address_space *address_space;
- VM_BUG_ON(!PageLocked(page));
- VM_BUG_ON(!PageSwapCache(page));
- VM_BUG_ON(PageWriteback(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
+ VM_BUG_ON_PAGE(!PageSwapCache(page), page);
+ VM_BUG_ON_PAGE(PageWriteback(page), page);
entry.val = page_private(page);
address_space = swap_address_space(entry);
@@ -165,8 +165,8 @@ int add_to_swap(struct page *page, struc
swp_entry_t entry;
int err;
- VM_BUG_ON(!PageLocked(page));
- VM_BUG_ON(!PageUptodate(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
+ VM_BUG_ON_PAGE(!PageUptodate(page), page);
entry = get_swap_page();
if (!entry.val)
diff -puN mm/swapfile.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/swapfile.c
--- a/mm/swapfile.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/swapfile.c
@@ -906,7 +906,7 @@ int reuse_swap_page(struct page *page)
{
int count;
- VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
if (unlikely(PageKsm(page)))
return 0;
count = page_mapcount(page);
@@ -926,7 +926,7 @@ int reuse_swap_page(struct page *page)
*/
int try_to_free_swap(struct page *page)
{
- VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON_PAGE(!PageLocked(page), page);
if (!PageSwapCache(page))
return 0;
@@ -2714,7 +2714,7 @@ struct swap_info_struct *page_swap_info(
*/
struct address_space *__page_file_mapping(struct page *page)
{
- VM_BUG_ON(!PageSwapCache(page));
+ VM_BUG_ON_PAGE(!PageSwapCache(page), page);
return page_swap_info(page)->swap_file->f_mapping;
}
EXPORT_SYMBOL_GPL(__page_file_mapping);
@@ -2722,7 +2722,7 @@ EXPORT_SYMBOL_GPL(__page_file_mapping);
pgoff_t __page_file_index(struct page *page)
{
swp_entry_t swap = { .val = page_private(page) };
- VM_BUG_ON(!PageSwapCache(page));
+ VM_BUG_ON_PAGE(!PageSwapCache(page), page);
return swp_offset(swap);
}
EXPORT_SYMBOL_GPL(__page_file_index);
diff -puN mm/util.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/util.c
--- a/mm/util.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/util.c
@@ -390,7 +390,7 @@ struct address_space *page_mapping(struc
{
struct address_space *mapping = page->mapping;
- VM_BUG_ON(PageSlab(page));
+ VM_BUG_ON_PAGE(PageSlab(page), page);
if (unlikely(PageSwapCache(page))) {
swp_entry_t entry;
diff -puN mm/vmscan.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page mm/vmscan.c
--- a/mm/vmscan.c~mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page
+++ a/mm/vmscan.c
@@ -603,7 +603,7 @@ void putback_lru_page(struct page *page)
bool is_unevictable;
int was_unevictable = PageUnevictable(page);
- VM_BUG_ON(PageLRU(page));
+ VM_BUG_ON_PAGE(PageLRU(page), page);
redo:
ClearPageUnevictable(page);
@@ -794,8 +794,8 @@ static unsigned long shrink_page_list(st
if (!trylock_page(page))
goto keep;
- VM_BUG_ON(PageActive(page));
- VM_BUG_ON(page_zone(page) != zone);
+ VM_BUG_ON_PAGE(PageActive(page), page);
+ VM_BUG_ON_PAGE(page_zone(page) != zone, page);
sc->nr_scanned++;
@@ -1079,14 +1079,14 @@ activate_locked:
/* Not a candidate for swapping, so reclaim swap space. */
if (PageSwapCache(page) && vm_swap_full())
try_to_free_swap(page);
- VM_BUG_ON(PageActive(page));
+ VM_BUG_ON_PAGE(PageActive(page), page);
SetPageActive(page);
pgactivate++;
keep_locked:
unlock_page(page);
keep:
list_add(&page->lru, &ret_pages);
- VM_BUG_ON(PageLRU(page) || PageUnevictable(page));
+ VM_BUG_ON_PAGE(PageLRU(page) || PageUnevictable(page), page);
}
free_hot_cold_page_list(&free_pages, 1);
@@ -1240,7 +1240,7 @@ static unsigned long isolate_lru_pages(u
page = lru_to_page(src);
prefetchw_prev_lru_page(page, src, flags);
- VM_BUG_ON(!PageLRU(page));
+ VM_BUG_ON_PAGE(!PageLRU(page), page);
switch (__isolate_lru_page(page, mode)) {
case 0:
@@ -1295,7 +1295,7 @@ int isolate_lru_page(struct page *page)
{
int ret = -EBUSY;
- VM_BUG_ON(!page_count(page));
+ VM_BUG_ON_PAGE(!page_count(page), page);
if (PageLRU(page)) {
struct zone *zone = page_zone(page);
@@ -1366,7 +1366,7 @@ putback_inactive_pages(struct lruvec *lr
struct page *page = lru_to_page(page_list);
int lru;
- VM_BUG_ON(PageLRU(page));
+ VM_BUG_ON_PAGE(PageLRU(page), page);
list_del(&page->lru);
if (unlikely(!page_evictable(page))) {
spin_unlock_irq(&zone->lru_lock);
@@ -1586,7 +1586,7 @@ static void move_active_pages_to_lru(str
page = lru_to_page(list);
lruvec = mem_cgroup_page_lruvec(page, zone);
- VM_BUG_ON(PageLRU(page));
+ VM_BUG_ON_PAGE(PageLRU(page), page);
SetPageLRU(page);
nr_pages = hpage_nr_pages(page);
@@ -3701,7 +3701,7 @@ void check_move_unevictable_pages(struct
if (page_evictable(page)) {
enum lru_list lru = page_lru_base_type(page);
- VM_BUG_ON(PageActive(page));
+ VM_BUG_ON_PAGE(PageActive(page), page);
ClearPageUnevictable(page);
del_page_from_lru_list(page, lruvec, LRU_UNEVICTABLE);
add_page_to_lru_list(page, lruvec, lru);
_
Patches currently in -mm which might be from sasha.levin@xxxxxxxxxx are
mm-munlock-fix-a-bug-where-thp-tail-page-is-encountered.patch
mm-munlock-fix-a-bug-where-thp-tail-page-is-encountered-v2.patch
mm-munlock-fix-deadlock-in-__munlock_pagevec.patch
mm-munlock-fix-deadlock-in-__munlock_pagevec-fix.patch
mm-remove-bogus-warning-in-copy_huge_pmd.patch
watchdog-trigger-all-cpu-backtrace-when-locked-up-and-going-to-panic.patch
mm-rmap-use-rmap_walk-in-page_referenced-fix.patch
mm-munlock-fix-potential-race-with-thp-page-split.patch
mm-remove-bug_on-from-mlock_vma_page.patch
mm-dump-page-when-hitting-a-vm_bug_on-using-vm_bug_on_page.patch
linux-next.patch
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