linux-kernel - Re: crashblk: a block device crash emulator.

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Message-Id: <C57CCCC1-B737-4F0E-8814-BEB9AA4FF4DF@dilger.ca>
Date:	Thu, 14 Jan 2016 12:44:40 -0700
From:	Andreas Dilger <adilger@...ger.ca>
To:	Takashi HOSHINO <hoshino@...s.cybozu.co.jp>
Cc:	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: crashblk: a block device crash emulator.

On Jan 13, 2016, at 6:50 PM, Takashi HOSHINO <hoshino@...s.cybozu.co.jp> wrote:
> 
> Hi all,
> 
> I'm developing 'crashblk'.
> It is a memory block device driver to emulate crash, IO error,
> and various response time.

Why not use/improve dm-flakey for this, rather than making yet another
device that does something similar?

Cheers, Andreas

> The source code repository is here:
> https://github.com/starpos/crashblk/
> 
> It is very useful to test wrapper block device drivers,
> and must be useful to test filesystems also.
> I used it to test WalB (https://walb-linux.github.io/),
> which is a wrapper block device driver for backup and asynchronous
> replication, and found/confirmed several bugs.
> 
> If you are interested in crashblk, try it and give me feedback!
> Thank you.
> 
> Takashi
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Cheers, Andreas






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