mm: add VM counters for transparent hugepages
authorAndi Kleen <ak@linux.intel.com>
Thu, 14 Apr 2011 22:22:06 +0000 (15:22 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 14 Apr 2011 23:06:55 +0000 (16:06 -0700)
commit81ab4201fb7d91d6b0cd9ad5b4b16776e4bed145
tree92f57a83fa43ac8f742ddb227a397028ab022afc
parentc897401bac2b099dd2ff673a9afe7193723d253c
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>
include/linux/vmstat.h
mm/huge_memory.c
mm/vmstat.c