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author | Jane Chu <jane.chu@oracle.com> | 2021-04-30 09:02:19 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-14 10:50:45 +0300 |
commit | 949e7c5f4957cd19670daa21d0ffc93c5d314446 (patch) | |
tree | a7775cc11a7252ab218144bd9e4a8073a8cd82e4 /mm/memory-failure.c | |
parent | 62d96faa74c8b00f79f84ef1d2b7c438735fdcc3 (diff) | |
download | linux-949e7c5f4957cd19670daa21d0ffc93c5d314446.tar.xz |
mm/memory-failure: unnecessary amount of unmapping
[ Upstream commit 4d75136be8bf3ae01b0bc3e725b2cdc921e103bd ]
It appears that unmap_mapping_range() actually takes a 'size' as its third
argument rather than a location, the current calling fashion causes
unnecessary amount of unmapping to occur.
Link: https://lkml.kernel.org/r/20210420002821.2749748-1-jane.chu@oracle.com
Fixes: 6100e34b2526e ("mm, memory_failure: Teach memory_failure() about dev_pagemap pages")
Signed-off-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'mm/memory-failure.c')
-rw-r--r-- | mm/memory-failure.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 570a20b42561..2d7a667f8e60 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1293,7 +1293,7 @@ static int memory_failure_dev_pagemap(unsigned long pfn, int flags, * communicated in siginfo, see kill_proc() */ start = (page->index << PAGE_SHIFT) & ~(size - 1); - unmap_mapping_range(page->mapping, start, start + size, 0); + unmap_mapping_range(page->mapping, start, size, 0); } kill_procs(&tokill, flags & MF_MUST_KILL, !unmap_success, pfn, flags); rc = 0; |