Subject: + mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock.patch added to -mm tree
To: kirill.shutemov@xxxxxxxxxxxxxxx,aarcange@xxxxxxxxxx,ak@xxxxxxxxxxxxxxx,athorlton@xxxxxxx,dave.hansen@xxxxxxxxx,davej@xxxxxxxxxx,dhowells@xxxxxxxxxx,ebiederm@xxxxxxxxxxxx,fweisbec@xxxxxxxxx,hannes@xxxxxxxxxxx,hughd@xxxxxxxxxx,keescook@xxxxxxxxxxxx,mgorman@xxxxxxx,mingo@xxxxxxxxxx,mtk.manpages@xxxxxxxxx,n-horiguchi@xxxxxxxxxxxxx,oleg@xxxxxxxxxx,paulmck@xxxxxxxxxxxxxxxxxx,peterz@xxxxxxxxxxxxx,riel@xxxxxxxxxx,robinmholt@xxxxxxxxx,sedat.dilek@xxxxxxxxx,srikar@xxxxxxxxxxxxxxxxxx,tglx@xxxxxxxxxxxxx,viro@xxxxxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 07 Oct 2013 16:10:18 -0700
The patch titled
Subject: mm, hugetlb: convert hugetlbfs to use split pmd lock
has been added to the -mm tree. Its filename is
mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock.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: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Subject: mm, hugetlb: convert hugetlbfs to use split pmd lock
Hugetlb supports multiple page sizes. We use split lock only for PMD
level, but not for PUD.
Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Tested-by: Alex Thorlton <athorlton@xxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "Eric W . Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: "Paul E . McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Dave Jones <davej@xxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Michael Kerrisk <mtk.manpages@xxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Robin Holt <robinmholt@xxxxxxxxx>
Cc: Sedat Dilek <sedat.dilek@xxxxxxxxx>
Cc: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/meminfo.c | 2
include/linux/hugetlb.h | 25 ++++++++
include/linux/swapops.h | 7 +-
mm/hugetlb.c | 108 ++++++++++++++++++++++----------------
mm/mempolicy.c | 5 +
mm/migrate.c | 7 +-
mm/rmap.c | 2
7 files changed, 103 insertions(+), 53 deletions(-)
diff -puN fs/proc/meminfo.c~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock fs/proc/meminfo.c
--- a/fs/proc/meminfo.c~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock
+++ a/fs/proc/meminfo.c
@@ -1,8 +1,8 @@
#include <linux/fs.h>
-#include <linux/hugetlb.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
+#include <linux/hugetlb.h>
#include <linux/mman.h>
#include <linux/mmzone.h>
#include <linux/proc_fs.h>
diff -puN include/linux/hugetlb.h~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock include/linux/hugetlb.h
--- a/include/linux/hugetlb.h~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock
+++ a/include/linux/hugetlb.h
@@ -392,6 +392,15 @@ static inline int hugepage_migration_sup
return pmd_huge_support() && (huge_page_shift(h) == PMD_SHIFT);
}
+static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
+ struct mm_struct *mm, pte_t *pte)
+{
+ if (huge_page_size(h) == PMD_SIZE)
+ return pmd_lockptr(mm, (pmd_t *) pte);
+ VM_BUG_ON(huge_page_size(h) == PAGE_SIZE);
+ return &mm->page_table_lock;
+}
+
#else /* CONFIG_HUGETLB_PAGE */
struct hstate {};
#define alloc_huge_page_node(h, nid) NULL
@@ -401,6 +410,7 @@ struct hstate {};
#define hstate_sizelog(s) NULL
#define hstate_vma(v) NULL
#define hstate_inode(i) NULL
+#define page_hstate(page) NULL
#define huge_page_size(h) PAGE_SIZE
#define huge_page_mask(h) PAGE_MASK
#define vma_kernel_pagesize(v) PAGE_SIZE
@@ -421,6 +431,21 @@ static inline pgoff_t basepage_index(str
#define dissolve_free_huge_pages(s, e) do {} while (0)
#define pmd_huge_support() 0
#define hugepage_migration_support(h) 0
+
+static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
+ struct mm_struct *mm, pte_t *pte)
+{
+ return &mm->page_table_lock;
+}
#endif /* CONFIG_HUGETLB_PAGE */
+static inline spinlock_t *huge_pte_lock(struct hstate *h,
+ struct mm_struct *mm, pte_t *pte)
+{
+ spinlock_t *ptl;
+ ptl = huge_pte_lockptr(h, mm, pte);
+ spin_lock(ptl);
+ return ptl;
+}
+
#endif /* _LINUX_HUGETLB_H */
diff -puN include/linux/swapops.h~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock include/linux/swapops.h
--- a/include/linux/swapops.h~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock
+++ a/include/linux/swapops.h
@@ -139,7 +139,8 @@ static inline void make_migration_entry_
extern void migration_entry_wait(struct mm_struct *mm, pmd_t *pmd,
unsigned long address);
-extern void migration_entry_wait_huge(struct mm_struct *mm, pte_t *pte);
+extern void migration_entry_wait_huge(struct vm_area_struct *vma,
+ struct mm_struct *mm, pte_t *pte);
#else
#define make_migration_entry(page, write) swp_entry(0, 0)
@@ -151,8 +152,8 @@ static inline int is_migration_entry(swp
static inline void make_migration_entry_read(swp_entry_t *entryp) { }
static inline void migration_entry_wait(struct mm_struct *mm, pmd_t *pmd,
unsigned long address) { }
-static inline void migration_entry_wait_huge(struct mm_struct *mm,
- pte_t *pte) { }
+static inline void migration_entry_wait_huge(struct vm_area_struct *vma,
+ struct mm_struct *mm, pte_t *pte) { }
static inline int is_write_migration_entry(swp_entry_t entry)
{
return 0;
diff -puN mm/hugetlb.c~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock mm/hugetlb.c
--- a/mm/hugetlb.c~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock
+++ a/mm/hugetlb.c
@@ -2362,6 +2362,7 @@ int copy_hugetlb_page_range(struct mm_st
cow = (vma->vm_flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE;
for (addr = vma->vm_start; addr < vma->vm_end; addr += sz) {
+ spinlock_t *src_ptl, *dst_ptl;
src_pte = huge_pte_offset(src, addr);
if (!src_pte)
continue;
@@ -2373,8 +2374,9 @@ int copy_hugetlb_page_range(struct mm_st
if (dst_pte == src_pte)
continue;
- spin_lock(&dst->page_table_lock);
- spin_lock_nested(&src->page_table_lock, SINGLE_DEPTH_NESTING);
+ dst_ptl = huge_pte_lock(h, dst, dst_pte);
+ src_ptl = huge_pte_lockptr(h, src, src_pte);
+ spin_lock_nested(src_ptl, SINGLE_DEPTH_NESTING);
if (!huge_pte_none(huge_ptep_get(src_pte))) {
if (cow)
huge_ptep_set_wrprotect(src, addr, src_pte);
@@ -2384,8 +2386,8 @@ int copy_hugetlb_page_range(struct mm_st
page_dup_rmap(ptepage);
set_huge_pte_at(dst, addr, dst_pte, entry);
}
- spin_unlock(&src->page_table_lock);
- spin_unlock(&dst->page_table_lock);
+ spin_unlock(src_ptl);
+ spin_unlock(dst_ptl);
}
return 0;
@@ -2428,6 +2430,7 @@ void __unmap_hugepage_range(struct mmu_g
unsigned long address;
pte_t *ptep;
pte_t pte;
+ spinlock_t *ptl;
struct page *page;
struct hstate *h = hstate_vma(vma);
unsigned long sz = huge_page_size(h);
@@ -2441,25 +2444,25 @@ void __unmap_hugepage_range(struct mmu_g
tlb_start_vma(tlb, vma);
mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
again:
- spin_lock(&mm->page_table_lock);
for (address = start; address < end; address += sz) {
ptep = huge_pte_offset(mm, address);
if (!ptep)
continue;
+ ptl = huge_pte_lock(h, mm, ptep);
if (huge_pmd_unshare(mm, &address, ptep))
- continue;
+ goto unlock;
pte = huge_ptep_get(ptep);
if (huge_pte_none(pte))
- continue;
+ goto unlock;
/*
* HWPoisoned hugepage is already unmapped and dropped reference
*/
if (unlikely(is_hugetlb_entry_hwpoisoned(pte))) {
huge_pte_clear(mm, address, ptep);
- continue;
+ goto unlock;
}
page = pte_page(pte);
@@ -2470,7 +2473,7 @@ again:
*/
if (ref_page) {
if (page != ref_page)
- continue;
+ goto unlock;
/*
* Mark the VMA as having unmapped its page so that
@@ -2487,13 +2490,18 @@ again:
page_remove_rmap(page);
force_flush = !__tlb_remove_page(tlb, page);
- if (force_flush)
+ if (force_flush) {
+ spin_unlock(ptl);
break;
+ }
/* Bail out after unmapping reference page if supplied */
- if (ref_page)
+ if (ref_page) {
+ spin_unlock(ptl);
break;
+ }
+unlock:
+ spin_unlock(ptl);
}
- spin_unlock(&mm->page_table_lock);
/*
* mmu_gather ran out of room to batch pages, we break out of
* the PTE lock to avoid doing the potential expensive TLB invalidate
@@ -2599,7 +2607,7 @@ static int unmap_ref_private(struct mm_s
*/
static int hugetlb_cow(struct mm_struct *mm, struct vm_area_struct *vma,
unsigned long address, pte_t *ptep, pte_t pte,
- struct page *pagecache_page)
+ struct page *pagecache_page, spinlock_t *ptl)
{
struct hstate *h = hstate_vma(vma);
struct page *old_page, *new_page;
@@ -2633,8 +2641,8 @@ retry_avoidcopy:
page_cache_get(old_page);
- /* Drop page_table_lock as buddy allocator may be called */
- spin_unlock(&mm->page_table_lock);
+ /* Drop page table lock as buddy allocator may be called */
+ spin_unlock(ptl);
new_page = alloc_huge_page(vma, address, outside_reserve);
if (IS_ERR(new_page)) {
@@ -2652,12 +2660,12 @@ retry_avoidcopy:
BUG_ON(huge_pte_none(pte));
if (unmap_ref_private(mm, vma, old_page, address)) {
BUG_ON(huge_pte_none(pte));
- spin_lock(&mm->page_table_lock);
+ spin_lock(ptl);
ptep = huge_pte_offset(mm, address & huge_page_mask(h));
if (likely(pte_same(huge_ptep_get(ptep), pte)))
goto retry_avoidcopy;
/*
- * race occurs while re-acquiring page_table_lock, and
+ * race occurs while re-acquiring page table lock, and
* our job is done.
*/
return 0;
@@ -2666,7 +2674,7 @@ retry_avoidcopy:
}
/* Caller expects lock to be held */
- spin_lock(&mm->page_table_lock);
+ spin_lock(ptl);
if (err == -ENOMEM)
return VM_FAULT_OOM;
else
@@ -2681,7 +2689,7 @@ retry_avoidcopy:
page_cache_release(new_page);
page_cache_release(old_page);
/* Caller expects lock to be held */
- spin_lock(&mm->page_table_lock);
+ spin_lock(ptl);
return VM_FAULT_OOM;
}
@@ -2693,10 +2701,10 @@ retry_avoidcopy:
mmun_end = mmun_start + huge_page_size(h);
mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
/*
- * Retake the page_table_lock to check for racing updates
+ * Retake the page table lock to check for racing updates
* before the page tables are altered
*/
- spin_lock(&mm->page_table_lock);
+ spin_lock(ptl);
ptep = huge_pte_offset(mm, address & huge_page_mask(h));
if (likely(pte_same(huge_ptep_get(ptep), pte))) {
ClearPagePrivate(new_page);
@@ -2710,13 +2718,13 @@ retry_avoidcopy:
/* Make the old page be freed below */
new_page = old_page;
}
- spin_unlock(&mm->page_table_lock);
+ spin_unlock(ptl);
mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
page_cache_release(new_page);
page_cache_release(old_page);
/* Caller expects lock to be held */
- spin_lock(&mm->page_table_lock);
+ spin_lock(ptl);
return 0;
}
@@ -2764,6 +2772,7 @@ static int hugetlb_no_page(struct mm_str
struct page *page;
struct address_space *mapping;
pte_t new_pte;
+ spinlock_t *ptl;
/*
* Currently, we are forced to kill the process in the event the
@@ -2850,7 +2859,8 @@ retry:
goto backout_unlocked;
}
- spin_lock(&mm->page_table_lock);
+ ptl = huge_pte_lockptr(h, mm, ptep);
+ spin_lock(ptl);
size = i_size_read(mapping->host) >> huge_page_shift(h);
if (idx >= size)
goto backout;
@@ -2871,16 +2881,16 @@ retry:
if ((flags & FAULT_FLAG_WRITE) && !(vma->vm_flags & VM_SHARED)) {
/* Optimization, do the COW without a second fault */
- ret = hugetlb_cow(mm, vma, address, ptep, new_pte, page);
+ ret = hugetlb_cow(mm, vma, address, ptep, new_pte, page, ptl);
}
- spin_unlock(&mm->page_table_lock);
+ spin_unlock(ptl);
unlock_page(page);
out:
return ret;
backout:
- spin_unlock(&mm->page_table_lock);
+ spin_unlock(ptl);
backout_unlocked:
unlock_page(page);
put_page(page);
@@ -2892,6 +2902,7 @@ int hugetlb_fault(struct mm_struct *mm,
{
pte_t *ptep;
pte_t entry;
+ spinlock_t *ptl;
int ret;
struct page *page = NULL;
struct page *pagecache_page = NULL;
@@ -2904,7 +2915,7 @@ int hugetlb_fault(struct mm_struct *mm,
if (ptep) {
entry = huge_ptep_get(ptep);
if (unlikely(is_hugetlb_entry_migration(entry))) {
- migration_entry_wait_huge(mm, ptep);
+ migration_entry_wait_huge(vma, mm, ptep);
return 0;
} else if (unlikely(is_hugetlb_entry_hwpoisoned(entry)))
return VM_FAULT_HWPOISON_LARGE |
@@ -2960,17 +2971,18 @@ int hugetlb_fault(struct mm_struct *mm,
if (page != pagecache_page)
lock_page(page);
- spin_lock(&mm->page_table_lock);
+ ptl = huge_pte_lockptr(h, mm, ptep);
+ spin_lock(ptl);
/* Check for a racing update before calling hugetlb_cow */
if (unlikely(!pte_same(entry, huge_ptep_get(ptep))))
- goto out_page_table_lock;
+ goto out_ptl;
if (flags & FAULT_FLAG_WRITE) {
if (!huge_pte_write(entry)) {
ret = hugetlb_cow(mm, vma, address, ptep, entry,
- pagecache_page);
- goto out_page_table_lock;
+ pagecache_page, ptl);
+ goto out_ptl;
}
entry = huge_pte_mkdirty(entry);
}
@@ -2979,8 +2991,8 @@ int hugetlb_fault(struct mm_struct *mm,
flags & FAULT_FLAG_WRITE))
update_mmu_cache(vma, address, ptep);
-out_page_table_lock:
- spin_unlock(&mm->page_table_lock);
+out_ptl:
+ spin_unlock(ptl);
if (pagecache_page) {
unlock_page(pagecache_page);
@@ -3006,9 +3018,9 @@ long follow_hugetlb_page(struct mm_struc
unsigned long remainder = *nr_pages;
struct hstate *h = hstate_vma(vma);
- spin_lock(&mm->page_table_lock);
while (vaddr < vma->vm_end && remainder) {
pte_t *pte;
+ spinlock_t *ptl = NULL;
int absent;
struct page *page;
@@ -3016,8 +3028,12 @@ long follow_hugetlb_page(struct mm_struc
* Some archs (sparc64, sh*) have multiple pte_ts to
* each hugepage. We have to make sure we get the
* first, for the page indexing below to work.
+ *
+ * Note that page table lock is not held when pte is null.
*/
pte = huge_pte_offset(mm, vaddr & huge_page_mask(h));
+ if (pte)
+ ptl = huge_pte_lock(h, mm, pte);
absent = !pte || huge_pte_none(huge_ptep_get(pte));
/*
@@ -3029,6 +3045,8 @@ long follow_hugetlb_page(struct mm_struc
*/
if (absent && (flags & FOLL_DUMP) &&
!hugetlbfs_pagecache_present(h, vma, vaddr)) {
+ if (pte)
+ spin_unlock(ptl);
remainder = 0;
break;
}
@@ -3048,10 +3066,10 @@ long follow_hugetlb_page(struct mm_struc
!huge_pte_write(huge_ptep_get(pte)))) {
int ret;
- spin_unlock(&mm->page_table_lock);
+ if (pte)
+ spin_unlock(ptl);
ret = hugetlb_fault(mm, vma, vaddr,
(flags & FOLL_WRITE) ? FAULT_FLAG_WRITE : 0);
- spin_lock(&mm->page_table_lock);
if (!(ret & VM_FAULT_ERROR))
continue;
@@ -3082,8 +3100,8 @@ same_page:
*/
goto same_page;
}
+ spin_unlock(ptl);
}
- spin_unlock(&mm->page_table_lock);
*nr_pages = remainder;
*position = vaddr;
@@ -3104,13 +3122,15 @@ unsigned long hugetlb_change_protection(
flush_cache_range(vma, address, end);
mutex_lock(&vma->vm_file->f_mapping->i_mmap_mutex);
- spin_lock(&mm->page_table_lock);
for (; address < end; address += huge_page_size(h)) {
+ spinlock_t *ptl;
ptep = huge_pte_offset(mm, address);
if (!ptep)
continue;
+ ptl = huge_pte_lock(h, mm, ptep);
if (huge_pmd_unshare(mm, &address, ptep)) {
pages++;
+ spin_unlock(ptl);
continue;
}
if (!huge_pte_none(huge_ptep_get(ptep))) {
@@ -3120,8 +3140,8 @@ unsigned long hugetlb_change_protection(
set_huge_pte_at(mm, address, ptep, pte);
pages++;
}
+ spin_unlock(ptl);
}
- spin_unlock(&mm->page_table_lock);
/*
* Must flush TLB before releasing i_mmap_mutex: x86's huge_pmd_unshare
* may have cleared our pud entry and done put_page on the page table:
@@ -3284,6 +3304,7 @@ pte_t *huge_pmd_share(struct mm_struct *
unsigned long saddr;
pte_t *spte = NULL;
pte_t *pte;
+ spinlock_t *ptl;
if (!vma_shareable(vma, addr))
return (pte_t *)pmd_alloc(mm, pud, addr);
@@ -3306,13 +3327,14 @@ pte_t *huge_pmd_share(struct mm_struct *
if (!spte)
goto out;
- spin_lock(&mm->page_table_lock);
+ ptl = huge_pte_lockptr(hstate_vma(vma), mm, spte);
+ spin_lock(ptl);
if (pud_none(*pud))
pud_populate(mm, pud,
(pmd_t *)((unsigned long)spte & PAGE_MASK));
else
put_page(virt_to_page(spte));
- spin_unlock(&mm->page_table_lock);
+ spin_unlock(ptl);
out:
pte = (pte_t *)pmd_alloc(mm, pud, addr);
mutex_unlock(&mapping->i_mmap_mutex);
@@ -3326,7 +3348,7 @@ out:
* indicated by page_count > 1, unmap is achieved by clearing pud and
* decrementing the ref count. If count == 1, the pte page is not shared.
*
- * called with vma->vm_mm->page_table_lock held.
+ * called with page table lock held.
*
* returns: 1 successfully unmapped a shared pte page
* 0 the underlying pte page is not shared, or it is the last user
diff -puN mm/mempolicy.c~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock mm/mempolicy.c
--- a/mm/mempolicy.c~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock
+++ a/mm/mempolicy.c
@@ -525,8 +525,9 @@ static void queue_pages_hugetlb_pmd_rang
#ifdef CONFIG_HUGETLB_PAGE
int nid;
struct page *page;
+ spinlock_t *ptl;
- spin_lock(&vma->vm_mm->page_table_lock);
+ ptl = huge_pte_lock(hstate_vma(vma), vma->vm_mm, (pte_t *)pmd);
page = pte_page(huge_ptep_get((pte_t *)pmd));
nid = page_to_nid(page);
if (node_isset(nid, *nodes) == !!(flags & MPOL_MF_INVERT))
@@ -536,7 +537,7 @@ static void queue_pages_hugetlb_pmd_rang
(flags & MPOL_MF_MOVE && page_mapcount(page) == 1))
isolate_huge_page(page, private);
unlock:
- spin_unlock(&vma->vm_mm->page_table_lock);
+ spin_unlock(ptl);
#else
BUG();
#endif
diff -puN mm/migrate.c~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock mm/migrate.c
--- a/mm/migrate.c~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock
+++ a/mm/migrate.c
@@ -130,7 +130,7 @@ static int remove_migration_pte(struct p
ptep = huge_pte_offset(mm, addr);
if (!ptep)
goto out;
- ptl = &mm->page_table_lock;
+ ptl = huge_pte_lockptr(hstate_vma(vma), mm, ptep);
} else {
pmd = mm_find_pmd(mm, addr);
if (!pmd)
@@ -247,9 +247,10 @@ void migration_entry_wait(struct mm_stru
__migration_entry_wait(mm, ptep, ptl);
}
-void migration_entry_wait_huge(struct mm_struct *mm, pte_t *pte)
+void migration_entry_wait_huge(struct vm_area_struct *vma,
+ struct mm_struct *mm, pte_t *pte)
{
- spinlock_t *ptl = &(mm)->page_table_lock;
+ spinlock_t *ptl = huge_pte_lockptr(hstate_vma(vma), mm, pte);
__migration_entry_wait(mm, pte, ptl);
}
diff -puN mm/rmap.c~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock mm/rmap.c
--- a/mm/rmap.c~mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock
+++ a/mm/rmap.c
@@ -601,7 +601,7 @@ pte_t *__page_check_address(struct page
if (unlikely(PageHuge(page))) {
pte = huge_pte_offset(mm, address);
- ptl = &mm->page_table_lock;
+ ptl = huge_pte_lockptr(page_hstate(page), mm, pte);
goto check;
}
_
Patches currently in -mm which might be from kirill.shutemov@xxxxxxxxxxxxxxx are
mm-huge_memoryc-fix-stale-comments-of-transparent_hugepage_flags.patch
mm-thp-cleanup-mv-alloc_hugepage-to-better-place.patch
mm-thp-khugepaged-add-policy-for-finding-target-node.patch
mm-thp-khugepaged-add-policy-for-finding-target-node-fix.patch
mm-avoid-increase-sizeofstruct-page-due-to-split-page-table-lock.patch
mm-rename-use_split_ptlocks-to-use_split_pte_ptlocks.patch
mm-convert-mm-nr_ptes-to-atomic_long_t.patch
mm-introduce-api-for-split-page-table-lock-for-pmd-level.patch
mm-thp-change-pmd_trans_huge_lock-to-return-taken-lock.patch
mm-thp-move-ptl-taking-inside-page_check_address_pmd.patch
mm-thp-do-not-access-mm-pmd_huge_pte-directly.patch
mm-hugetlb-convert-hugetlbfs-to-use-split-pmd-lock.patch
mm-convert-the-rest-to-new-page-table-lock-api.patch
mm-implement-split-page-table-lock-for-pmd-level.patch
x86-mm-enable-split-page-table-lock-for-pmd-level.patch
thp-mm-locking-tail-page-is-a-bug.patch
mm-drop-actor-argument-of-do_generic_file_read.patch
mm-drop-actor-argument-of-do_generic_file_read-fix.patch
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