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| author | Andi Kleen <ak@linux.intel.com> | 2011-04-14 15:22:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-04-14 16:06:55 -0700 |
| commit | 81ab4201fb7d91d6b0cd9ad5b4b16776e4bed145 (patch) | |
| tree | 92f57a83fa43ac8f742ddb227a397028ab022afc /include/linux/vmstat.h | |
| parent | c897401bac2b099dd2ff673a9afe7193723d253c (diff) | |
| download | lwn-81ab4201fb7d91d6b0cd9ad5b4b16776e4bed145.tar.gz lwn-81ab4201fb7d91d6b0cd9ad5b4b16776e4bed145.zip | |
mm: add VM counters for transparent hugepages
I found it difficult to make sense of transparent huge pages without
having any counters for its actions. Add some counters to vmstat for
allocation of transparent hugepages and fallback to smaller pages.
Optional patch, but useful for development and understanding the system.
Contains improvements from Andrea Arcangeli and Johannes Weiner
[akpm@linux-foundation.org: coding-style fixes]
[hannes@cmpxchg.org: fix vmstat_text[] entries]
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/vmstat.h')
| -rw-r--r-- | include/linux/vmstat.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index 461c0119664f..2b3831b58aa4 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -58,6 +58,13 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, UNEVICTABLE_PGCLEARED, /* on COW, page truncate */ UNEVICTABLE_PGSTRANDED, /* unable to isolate on unlock */ UNEVICTABLE_MLOCKFREED, +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + THP_FAULT_ALLOC, + THP_FAULT_FALLBACK, + THP_COLLAPSE_ALLOC, + THP_COLLAPSE_ALLOC_FAILED, + THP_SPLIT, +#endif NR_VM_EVENT_ITEMS }; |