On Fri, Jun 7, 2019 at 6:39 AM Naohiro Aota <naohiro.aota@xxxxxxx> wrote:
>
> 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@xxxxxxx>
Reviewed-by: Filipe Manana <fdmanana@xxxxxxxx>
Thanks!
> ---
> changelog:
> v2:
> - Update the expected output as well.
> ---
> tests/btrfs/163 | 2 +-
> tests/btrfs/163.out | 4 ++--
> 2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/tests/btrfs/163 b/tests/btrfs/163
> index 8c93e83b970a..24c725afb6b9 100755
> --- a/tests/btrfs/163
> +++ b/tests/btrfs/163
> @@ -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
> diff --git a/tests/btrfs/163.out b/tests/btrfs/163.out
> index 50f46da6df86..91f6f5b6f48a 100644
> --- a/tests/btrfs/163.out
> +++ b/tests/btrfs/163.out
> @@ -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
> --
> 2.21.0
>
--
Filipe David Manana,
“Whether you think you can, or you think you can't — you're right.”
