btrfs/163: make readahead run on the seed device
authorNaohiro Aota <naohiro.aota@wdc.com>
Fri, 7 Jun 2019 05:39:10 +0000 (14:39 +0900)
committerEryu Guan <guaneryu@gmail.com>
Fri, 7 Jun 2019 11:01:33 +0000 (19:01 +0800)
There is a long lived bug that btrfs wait for readahead to finish
indefinitely when readahead zone is inserted into seed devices.

Current write size to the file "foobar" is too small to run readahead
before the replacing on seed device. So, increase the write size to
reproduce the issue.

Following patch fixes it:

"btrfs: start readahead also in seed devices"

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
tests/btrfs/163
tests/btrfs/163.out

index 8c93e83..24c725a 100755 (executable)
@@ -50,7 +50,7 @@ create_seed()
 {
        _mkfs_dev $dev_seed
        run_check _mount $dev_seed $SCRATCH_MNT
-       $XFS_IO_PROG -f -d -c "pwrite -S 0xab 0 256K" $SCRATCH_MNT/foobar >\
+       $XFS_IO_PROG -f -d -c "pwrite -S 0xab 0 4M" $SCRATCH_MNT/foobar >\
                /dev/null
        echo -- gloden --
        od -x $SCRATCH_MNT/foobar
index 50f46da..91f6f5b 100644 (file)
@@ -2,8 +2,8 @@ QA output created by 163
 -- gloden --
 0000000 abab abab abab abab abab abab abab abab
 *
-1000000
+20000000
 -- sprout --
 0000000 abab abab abab abab abab abab abab abab
 *
-1000000
+20000000