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authorJane Chu <jane.chu@oracle.com>2021-04-29 23:02:19 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-05-14 09:50:45 +0200
commit949e7c5f4957cd19670daa21d0ffc93c5d314446 (patch)
treea7775cc11a7252ab218144bd9e4a8073a8cd82e4 /mm
parent62d96faa74c8b00f79f84ef1d2b7c438735fdcc3 (diff)
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')
-rw-r--r--mm/memory-failure.c2
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;