The patch titled
Subject: mm/debug.c: provide useful debugging information for VM_BUG
has been added to the -mm tree. Its filename is
provide-useful-debugging-information-for-vm_bug.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/provide-useful-debugging-information-for-vm_bug.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/provide-useful-debugging-information-for-vm_bug.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: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Subject: mm/debug.c: provide useful debugging information for VM_BUG
With the recent addition of hashed kernel pointers, places which need to
produce useful debug output have to specify %px, not %p. This patch fixes
all the VM debug to use %px. This is appropriate because it's debug
output that the user should never be able to trigger, and kernel
developers need to see the actual pointers.
Link: http://lkml.kernel.org/r/20171219133236.GE13680@xxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Cc: "Tobin C. Harding" <me@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/debug.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff -puN mm/debug.c~provide-useful-debugging-information-for-vm_bug mm/debug.c
--- a/mm/debug.c~provide-useful-debugging-information-for-vm_bug
+++ a/mm/debug.c
@@ -50,7 +50,7 @@ void __dump_page(struct page *page, cons
*/
int mapcount = PageSlab(page) ? 0 : page_mapcount(page);
- pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx",
+ pr_emerg("page:%px count:%d mapcount:%d mapping:%px index:%#lx",
page, page_ref_count(page), mapcount,
page->mapping, page_to_pgoff(page));
if (PageCompound(page))
@@ -69,7 +69,7 @@ void __dump_page(struct page *page, cons
#ifdef CONFIG_MEMCG
if (page->mem_cgroup)
- pr_alert("page->mem_cgroup:%p\n", page->mem_cgroup);
+ pr_alert("page->mem_cgroup:%px\n", page->mem_cgroup);
#endif
}
@@ -84,10 +84,10 @@ EXPORT_SYMBOL(dump_page);
void dump_vma(const struct vm_area_struct *vma)
{
- pr_emerg("vma %p start %p end %p\n"
- "next %p prev %p mm %p\n"
- "prot %lx anon_vma %p vm_ops %p\n"
- "pgoff %lx file %p private_data %p\n"
+ pr_emerg("vma %px start %px end %px\n"
+ "next %px prev %px mm %px\n"
+ "prot %lx anon_vma %px vm_ops %px\n"
+ "pgoff %lx file %px private_data %px\n"
"flags: %#lx(%pGv)\n",
vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_next,
vma->vm_prev, vma->vm_mm,
@@ -100,27 +100,27 @@ EXPORT_SYMBOL(dump_vma);
void dump_mm(const struct mm_struct *mm)
{
- pr_emerg("mm %p mmap %p seqnum %d task_size %lu\n"
+ pr_emerg("mm %px mmap %px seqnum %d task_size %lu\n"
#ifdef CONFIG_MMU
- "get_unmapped_area %p\n"
+ "get_unmapped_area %px\n"
#endif
"mmap_base %lu mmap_legacy_base %lu highest_vm_end %lu\n"
- "pgd %p mm_users %d mm_count %d pgtables_bytes %lu map_count %d\n"
+ "pgd %px mm_users %d mm_count %d pgtables_bytes %lu map_count %d\n"
"hiwater_rss %lx hiwater_vm %lx total_vm %lx locked_vm %lx\n"
"pinned_vm %lx data_vm %lx exec_vm %lx stack_vm %lx\n"
"start_code %lx end_code %lx start_data %lx end_data %lx\n"
"start_brk %lx brk %lx start_stack %lx\n"
"arg_start %lx arg_end %lx env_start %lx env_end %lx\n"
- "binfmt %p flags %lx core_state %p\n"
+ "binfmt %px flags %lx core_state %px\n"
#ifdef CONFIG_AIO
- "ioctx_table %p\n"
+ "ioctx_table %px\n"
#endif
#ifdef CONFIG_MEMCG
- "owner %p "
+ "owner %px "
#endif
- "exe_file %p\n"
+ "exe_file %px\n"
#ifdef CONFIG_MMU_NOTIFIER
- "mmu_notifier_mm %p\n"
+ "mmu_notifier_mm %px\n"
#endif
#ifdef CONFIG_NUMA_BALANCING
"numa_next_scan %lu numa_scan_offset %lu numa_scan_seq %d\n"
_
Patches currently in -mm which might be from mawilcox@xxxxxxxxxxxxx are
provide-useful-debugging-information-for-vm_bug.patch
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