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authorTejun Heo <tj@kernel.org>2010-05-15 20:09:27 +0200
committerJens Axboe <jens.axboe@oracle.com>2010-05-21 20:01:02 +0200
commitfa4b9074cd8428958c2adf9dc0c831f46e27c193 (patch)
tree752103db616696fd7ba3374948fac9ebdf462d9e /fs
parentf1ac2502e19c59e996242d406fcc60e4c563e8ce (diff)
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buffer: make invalidate_bdev() drain all percpu LRU add caches
invalidate_bdev() should release all page cache pages which are clean and not being used; however, if some pages are still in the percpu LRU add caches on other cpus, those pages are considered in used and don't get released. Fix it by calling lru_add_drain_all() before trying to invalidate pages. This problem was discovered while testing block automatic native capacity unlocking. Null pages which were read before automatic unlocking didn't get released by invalidate_bdev() and ended up interfering with partition scan after unlocking. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/buffer.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index c9c266db0624..08e422d56996 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -275,6 +275,7 @@ void invalidate_bdev(struct block_device *bdev)
return;
invalidate_bh_lrus();
+ lru_add_drain_all(); /* make sure all lru add caches are flushed */
invalidate_mapping_pages(mapping, 0, -1);
}
EXPORT_SYMBOL(invalidate_bdev);