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| author | Wu Fengguang <fengguang.wu@intel.com> | 2010-03-10 15:20:43 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-12 15:52:28 -0800 |
| commit | 718a38211bf4375c0a1efad3afbc5dbaef5d33f9 (patch) | |
| tree | ade6815c619705f0342f98cc8bb39fa3309c81a6 /mm/memory.c | |
| parent | 9b3a6549b2602ca30f58715a0071e29f9898cae9 (diff) | |
| download | lwn-718a38211bf4375c0a1efad3afbc5dbaef5d33f9.tar.gz lwn-718a38211bf4375c0a1efad3afbc5dbaef5d33f9.zip | |
mm: introduce dump_page() and print symbolic flag names
- introduce dump_page() to print the page info for debugging some error
condition.
- convert three mm users: bad_page(), print_bad_pte() and memory offline
failure.
- print an extra field: the symbolic names of page->flags
Example dump_page() output:
[ 157.521694] page:ffffea0000a7cba8 count:2 mapcount:1 mapping:ffff88001c901791 index:0x147
[ 157.525570] page flags: 0x100000000100068(uptodate|lru|active|swapbacked)
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Alex Chiang <achiang@hp.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Mel Gorman <mel@linux.vnet.ibm.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/mm/memory.c b/mm/memory.c index 3d9130bd95d0..5b7f2002e54b 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -509,12 +509,8 @@ static void print_bad_pte(struct vm_area_struct *vma, unsigned long addr, "BUG: Bad page map in process %s pte:%08llx pmd:%08llx\n", current->comm, (long long)pte_val(pte), (long long)pmd_val(*pmd)); - if (page) { - printk(KERN_ALERT - "page:%p flags:%p count:%d mapcount:%d mapping:%p index:%lx\n", - page, (void *)page->flags, page_count(page), - page_mapcount(page), page->mapping, page->index); - } + if (page) + dump_page(page); printk(KERN_ALERT "addr:%p vm_flags:%08lx anon_vma:%p mapping:%p index:%lx\n", (void *)addr, vma->vm_flags, vma->anon_vma, mapping, index); |