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Date:   Fri, 30 Apr 2021 23:43:21 +0800
From:   Wang Yugui <wangyugui@e16-tech.com>
To:     dsterba@suse.cz, Wang Yugui <wangyugui@e16-tech.com>,
        Josef Bacik <josef@toxicpanda.com>,
        linux-btrfs@vger.kernel.org, kernel-team@fb.com
Subject: Re: [PATCH 0/7] Preemptive flushing improvements
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Hi,

> On Fri, Apr 30, 2021 at 06:23:08AM +0800, Wang Yugui wrote:
> > > > > This is the file 562.out.bad.
> 
> Can you please post again the error?

This is the head part of the file of 562.out.bad(whole file is 2.55M).

QA output created by 562
XFS_IOC_CLONE: No space left on device
File foo data after cloning and remount:
0000000 c7 c7 c7 c7 c7 c7 c7 c7 c7 c7 c7 c7 c7 c7 c7 c7
*
25509888 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
*
25513984 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5
*
25518080 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
*
25522176 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5 e5
<repeat of 00 00.../e5 e5...>

> > By the way, We enable '-O no-holes -R free-space-tree' default for
> > mkfs.btrfs.
> 
> The fstests cases are not robust enough to catch differences in the
> output when various features are enabled so it depends on the exact
> error.

Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2021/04/30