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 08cf437ba74b0295154cd92ed1bca44d714119e1
Author: Davidlohr Bueso <d...@stgolabs.net>
Date: Thu Dec 3 11:41:32 2020 +0300
ms/mm/memory.c: share the i_mmap_rwsem
The unmap_mapping_range family of functions do the unmapping of user pages
(ultimately via zap_page_range_single) without touching the actual
interval tree, thus share the lock.
Signed-off-by: Davidlohr Bueso <dbu...@suse.de>
Cc: "Kirill A. Shutemov" <kir...@shutemov.name>
Acked-by: Hugh Dickins <hu...@google.com>
Cc: Oleg Nesterov <o...@redhat.com>
Cc: 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 c8475d144abb1e62958cc5ec281d2a9e161c1946)
Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com>
---
mm/memory.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/memory.c b/mm/memory.c
index ac2d668..f6017f3 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2702,10 +2702,10 @@ void unmap_mapping_range(struct address_space *mapping,
if (details.last_index < details.first_index)
details.last_index = ULONG_MAX;
- i_mmap_lock_write(mapping);
+ i_mmap_lock_read(mapping);
if (unlikely(!RB_EMPTY_ROOT(&mapping->i_mmap)))
unmap_mapping_range_tree(&mapping->i_mmap, &details);
- i_mmap_unlock_write(mapping);
+ i_mmap_unlock_read(mapping);
}
EXPORT_SYMBOL(unmap_mapping_range);
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