The commit is pushed to "branch-rh7-3.10.0-1160.6.1.vz7.171.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-1160.6.1.vz7.171.1
------>
commit b23df19a9094951735485cff30ffed441d7f578a
Author: Davidlohr Bueso <d...@stgolabs.net>
Date: Thu Dec 3 11:41:13 2020 +0300
ms/mm/memory-failure: share the i_mmap_rwsem
No brainer conversion: collect_procs_file() only schedules a process for
later kill, share the lock, similarly to the anon vma variant.
Signed-off-by: Davidlohr Bueso <dbu...@suse.de>
Acked-by: "Kirill A. Shutemov" <kir...@shutemov.name>
Acked-by: Hugh Dickins <hu...@google.com>
Cc: Oleg Nesterov <o...@redhat.com>
Acked-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Cc: Rik van Riel <r...@redhat.com>
Cc: Srikar Dronamraju <sri...@linux.vnet.ibm.com>
Acked-by: Mel Gorman <mgor...@suse.de>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
https://jira.sw.ru/browse/PSBM-122663
(cherry picked from commit d28eb9c861f41aa2af4cfcc5eeeddff42b13d31e)
Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com>
---
mm/memory-failure.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index a0ea96c..808f91d 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -496,7 +496,7 @@ static void collect_procs_file(struct page *page, struct
list_head *to_kill,
struct task_struct *tsk;
struct address_space *mapping = page->mapping;
- i_mmap_lock_write(mapping);
+ i_mmap_lock_read(mapping);
qread_lock(&tasklist_lock);
for_each_process(tsk) {
pgoff_t pgoff = page_to_pgoff(page);
@@ -518,7 +518,7 @@ static void collect_procs_file(struct page *page, struct
list_head *to_kill,
}
}
qread_unlock(&tasklist_lock);
- i_mmap_unlock_write(mapping);
+ i_mmap_unlock_read(mapping);
}
/*
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