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mm: thp: inc counter for collapsed shmem THP

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/sys/kernel/mm/transparent_hugepage/khugepaged/pages_collapsed is used
to record the counter of collapsed THP, but it just gets inc'ed in
anonymous THP collapse path, do this for shmem THP collapse too.

Link: http://lkml.kernel.org/r/1529622949-75504-2-git-send-email-yang.shi@linux.alibaba.com
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yang Shi 2018-08-17 15:45:29 -07:00 committed by Linus Torvalds
parent c2231020ea
commit 87aa752906
1 changed files with 2 additions and 0 deletions
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mm/khugepaged.c
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@ -1516,6 +1516,8 @@ tree_unlocked:
unlock_page(new_page);
*hpage = NULL;
khugepaged_pages_collapsed++;
} else {
/* Something went wrong: rollback changes to the radix-tree */
shmem_uncharge(mapping->host, nr_none);