[prev in list] [next in list] [prev in thread] [next in thread]
List: openvz-devel
Subject: [Devel] [PATCH rh7 6/8] ms/mm/memory-failure: share the i_mmap_rwsem
From: Andrey Ryabinin <aryabinin () virtuozzo ! com>
Date: 2020-11-30 15:28:28
Message-ID: 20201130152830.26081-6-aryabinin () virtuozzo ! com
[Download RAW message or body]
From: Davidlohr Bueso <dave@stgolabs.net>
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 <dbueso@suse.de>
Acked-by: "Kirill A. Shutemov" <kirill@shutemov.name>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
https://jira.sw.ru/browse/PSBM-122663
(cherry picked from commit d28eb9c861f41aa2af4cfcc5eeeddff42b13d31e)
Signed-off-by: Andrey Ryabinin <aryabinin@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 da1ef2edd5dd..a5f5e604c0b8 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -497,7 +497,7 @@ 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);
@@ -519,7 +519,7 @@ 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);
}
/*
--
2.26.2
_______________________________________________
Devel mailing list
Devel@openvz.org
https://lists.openvz.org/mailman/listinfo/devel
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic