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thp, vmstats: add counters for huge file pages

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THP_FILE_ALLOC: how many times huge page was allocated and put page
cache.

THP_FILE_MAPPED: how many times file huge page was mapped.

Link: http://lkml.kernel.org/r/1466021202-61880-13-git-send-email-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kirill A. Shutemov
2016-07-26 15:25:31 -07:00
committed by Linus Torvalds
parent 1010245964
commit 95ecedcd6a
3 changed files with 10 additions and 0 deletions
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mm/memory.c
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@@ -2968,6 +2968,7 @@ static int do_set_pmd(struct fault_env *fe, struct page *page)
/* fault is handled */
ret = 0;
count_vm_event(THP_FILE_MAPPED);
out:
spin_unlock(fe->ptl);
return ret;