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Date:   Tue, 04 Dec 2018 19:25:53 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...r.kernel.org
Subject: [Bug 201685] ext4 file system corruption

https://bugzilla.kernel.org/show_bug.cgi?id=201685

--- Comment #237 from Rainer Fiebig (jrf@...lbox.org) ---
(In reply to Lukáš Krejčí from comment #232)
> Created attachment 279845 [details]
> git bisect between v4.18 and 4.19-rc1
> 
> Hello,
> 
> I am able to reproduce the data corruption under Qemu, the issue usually
> shows itself fairly quickly (within a minute or two). Generally, the bug was
> very likely to appear when (un)installing packages with apt.
> 
> I ran a bisect with the following result (full bisect log is attached):
> # first bad commit: [6ce3dd6eec114930cf2035a8bcb1e80477ed79a8] blk-mq: issue
> directly if hw queue isn't busy in case of 'none'
> 
[...]

Congrats! Good to see progress here. Thanks!

I also feel somewhat vindicated as my idea to catch and bisect this in VM
wasn't so bad after all. ;)

But obviously qemu has more knobs to turn than VB - and you just turned the
right ones. Great!

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