Re: [PATCH] fstests: btrfs: enhance regression test for nocsum dio read's repair

[Lu Fengqi <lufq.fnst@cn.fujitsu.com>]

On Tue, Aug 15, 2017 at 05:16:06PM +0800, Eryu Guan wrote:
>On Mon, Aug 14, 2017 at 03:03:13PM +0800, Lu Fengqi wrote:
>> I catch this following error from dmesg when this testcase fails.
>> 
>> [17446.661127] Buffer I/O error on dev sdb1, logical block 64, async page read
>> 
>> We expect to inject disk IO errors on the device when xfs_io reads the
>> specific file, but other processes may trigger IO error earlier. So, we
>> can use task-filter to solve this problem.
>> 
>> Signed-off-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
>
>This looks OK to me. Does btrfs/143 need a similar fix?
>
>Thanks,
>Eryu
>
>

Although btrfs/143 has a similar problem, this method doesn't work for it.
Unlike btrfs/142, the second IO error needs to be triggered by another process,
not by xfs_io. So we can't simply set task-filter to solve this problem.

I'm still investigating a way to solve the problem.

Do you have any ideas?
Any help will be greatly appreciated.

-- 
Thanks,
Lu