diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-05-25 08:12:55 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-06-01 07:43:32 -0600 |
| commit | 210a6d756f20f33fc546ec8682a538fbcb84ee8e (patch) | |
| tree | 46e1105d6651b71e5d7d9df2c7f1651fb1de0d95 /fs/block_dev.c | |
| parent | 362529d9280af4b08d2c25a4b39b8e5ae7658f9a (diff) | |
| download | lwn-210a6d756f20f33fc546ec8682a538fbcb84ee8e.tar.gz lwn-210a6d756f20f33fc546ec8682a538fbcb84ee8e.zip | |
block: move sync_blockdev from __blkdev_put to blkdev_put
Do the early unlocked syncing even earlier to move more code out of
the recursive path.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20210525061301.2242282-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/block_dev.c')
| -rw-r--r-- | fs/block_dev.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index 2b5073e3c923..41d2d9708bf8 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1552,16 +1552,6 @@ static void __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part) struct gendisk *disk = bdev->bd_disk; struct block_device *victim = NULL; - /* - * Sync early if it looks like we're the last one. If someone else - * opens the block device between now and the decrement of bd_openers - * then we did a sync that we didn't need to, but that's not the end - * of the world and we want to avoid long (could be several minute) - * syncs while holding the mutex. - */ - if (bdev->bd_openers == 1) - sync_blockdev(bdev); - mutex_lock_nested(&bdev->bd_mutex, for_part); if (for_part) bdev->bd_part_count--; @@ -1588,6 +1578,16 @@ void blkdev_put(struct block_device *bdev, fmode_t mode) { struct gendisk *disk = bdev->bd_disk; + /* + * Sync early if it looks like we're the last one. If someone else + * opens the block device between now and the decrement of bd_openers + * then we did a sync that we didn't need to, but that's not the end + * of the world and we want to avoid long (could be several minute) + * syncs while holding the mutex. + */ + if (bdev->bd_openers == 1) + sync_blockdev(bdev); + mutex_lock(&bdev->bd_mutex); if (mode & FMODE_EXCL) { |