From e480b3f5cb47203c919c8ba9036063cddf388659 Mon Sep 17 00:00:00 2001 From: Jane Chu Date: Wed, 30 Jun 2021 21:03:11 +0800 Subject: [PATCH] mm/memory-failure: unnecessary amount of unmapping stable inclusion from linux-4.19.191 commit e816fbc72270850317505ca8d6d80d652345310f -------------------------------- [ 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 Reviewed-by: Dan Williams Reviewed-by: Naoya Horiguchi Cc: Dave Jiang Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin Signed-off-by: Yang Yingliang --- mm/memory-failure.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 72f704d14072..145262227bb0 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1220,7 +1220,7 @@ 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; -- GitLab