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authorNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>2016-03-17 22:17:41 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-17 23:09:34 +0100
commit832fc1de01aea28255cb11d270679b7f1273f0d7 (patch)
treeef020cb2a44d1fee4df1359fbb3fc11a08de733b /mm/internal.h
parentmm: memcontrol: report kernel stack usage in cgroup2 memory.stat (diff)
downloadlinux-832fc1de01aea28255cb11d270679b7f1273f0d7.tar.xz
linux-832fc1de01aea28255cb11d270679b7f1273f0d7.zip
/proc/kpageflags: return KPF_BUDDY for "tail" buddy pages
Currently /proc/kpageflags returns nothing for "tail" buddy pages, which is inconvenient when grasping how free pages are distributed. This patch sets KPF_BUDDY for such pages. With this patch: $ grep MemFree /proc/meminfo ; tools/vm/page-types -b buddy MemFree: 3134992 kB flags page-count MB symbolic-flags long-symbolic-flags 0x0000000000000400 779272 3044 __________B_______________________________ buddy 0x0000000000000c00 4385 17 __________BM______________________________ buddy,mmap total 783657 3061 783657 pages is 3134628 kB (roughly consistent with the global counter,) so it's OK. [akpm@linux-foundation.org: update comment, per Naoya] Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com>> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
-rw-r--r--mm/internal.h3
1 files changed, 0 insertions, 3 deletions
diff --git a/mm/internal.h b/mm/internal.h
index ad9400d759c8..b95952c2faec 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -148,9 +148,6 @@ extern int __isolate_free_page(struct page *page, unsigned int order);
extern void __free_pages_bootmem(struct page *page, unsigned long pfn,
unsigned int order);
extern void prep_compound_page(struct page *page, unsigned int order);
-#ifdef CONFIG_MEMORY_FAILURE
-extern bool is_free_buddy_page(struct page *page);
-#endif
extern int user_min_free_kbytes;
#if defined CONFIG_COMPACTION || defined CONFIG_CMA