]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
madvise_free, thp: fix madvise_free_huge_pmd return value after splitting
authorHuang Ying <ying.huang@intel.com>
Thu, 14 Jul 2016 19:07:12 +0000 (12:07 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 15 Jul 2016 05:54:27 +0000 (14:54 +0900)
commit9818b8cde6221fe7a52aad816425f67d4439b14e
tree47e2d3bfcbbbfdeb5a0211d1924330407f4b11ef
parentef722fd4a7592ddbfa42bcb3ad8a5caa598589b3
madvise_free, thp: fix madvise_free_huge_pmd return value after splitting

madvise_free_huge_pmd should return 0 if the fallback PTE operations are
required.  In madvise_free_huge_pmd, if part pages of THP are discarded,
the THP will be split and fallback PTE operations should be used if
splitting succeeds.  But the original code will make fallback PTE
operations skipped, after splitting succeeds.  Fix that via make
madvise_free_huge_pmd return 0 after splitting successfully, so that the
fallback PTE operations will be done.

Link: http://lkml.kernel.org/r/1467135452-16688-1-git-send-email-ying.huang@intel.com
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Ebru Akagunduz <ebru.akagunduz@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/huge_memory.c