The patch titled
Subject: mm: thp: inc counter for collapsed shmem THP
has been added to the -mm tree. Its filename is
mm-thp-inc-counter-for-collapsed-shmem-thp.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-thp-inc-counter-for-collapsed-shmem-thp.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-thp-inc-counter-for-collapsed-shmem-thp.patch
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------------------------------------------------------
From: Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx>
Subject: mm: thp: inc counter for collapsed shmem THP
/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@xxxxxxxxxxxxxxxxx
Signed-off-by: Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
diff -puN mm/khugepaged.c~mm-thp-inc-counter-for-collapsed-shmem-thp mm/khugepaged.c
--- a/mm/khugepaged.c~mm-thp-inc-counter-for-collapsed-shmem-thp
+++ a/mm/khugepaged.c
@@ -1522,6 +1522,8 @@ 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);
_
Patches currently in -mm which might be from yang.shi@xxxxxxxxxxxxxxxxx are
doc-add-description-to-dirtytime_expire_seconds.patch
thp-use-mm_file_counter-to-determine-update-which-rss-counter.patch
mm-thp-register-mm-for-khugepaged-when-merging-vma-for-shmem.patch
mm-thp-inc-counter-for-collapsed-shmem-thp.patch
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