During the mount context btrfs_open_devices() calls invalidate_bdev()
for all the devices. So drop the invalidate_bdev() in open_ctree()
which is only for the btrfs_fs_devices::latest_bdev.
The call trace is as shown below.
btrfs_mount_root()
|
|_btrfs_parse_early_options (-o device only)
| |_btrfs_scan_one_device
| |_btrfs_read_disk_super()
| |_read_cache_page_gfp()
|
|_btrfs_scan_one_device(mount-arg-dev only)
| |_btrfs_read_disk_super()
| |_read_cache_page_gfp()
|
|
|_btrfs_open_devices(fsid:all)
| |_btrfs_open_one_device()
| |_btrfs_get_bdev_and_sb() <--- invalidate_bdev(fsid:all)
| |_btrfs_read_dev_super()
| |_btrfs_read_dev_one_super()
| |___bread()
|
|_btrfs_fill_super()
|_btrfs_open_ctree() <-- invalidate_bdev(latest_bdev) <-- redundant
|_btrfs_read_dev_super(latest_bdev only)
|_btrfs_read_dev_one_super(latest_bdev only)
|___bread(latest_bdev)
Signed-off-by: Anand Jain <[email protected]>
---
fs/btrfs/disk-io.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 110465bec775..628c2b1d1349 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2553,8 +2553,6 @@ int open_ctree(struct super_block *sb,
__setup_root(tree_root, fs_info, BTRFS_ROOT_TREE_OBJECTID);
- invalidate_bdev(fs_devices->latest_bdev);
-
/*
* Read super block and check the signature bytes only
*/
--
2.7.0
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