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Re: [PATCH 7/8] xfstests: add a new test that runs fsstress under ENOSPC

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH 7/8] xfstests: add a new test that runs fsstress under ENOSPC conditions
From: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
Date: Thu, 03 Nov 2011 00:36:36 +0400
Cc: linux-fsdevel@xxxxxxxxxxxxxxx, aelder@xxxxxxx, hch@xxxxxx, xfs@xxxxxxxxxxx
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On Wed, 2 Nov 2011 15:53:58 -0400, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> On Sat, Oct 29, 2011 at 04:48:16AM +0400, Dmitry Monakhov wrote:
> > During stress testing we want to cover as much code paths as possible
> > fsstress is very good for this purpose. But it has expandable nature
> > (disk usage almost continually grow). So once it goes in no ENOSPC
> > condition it will be where till the end. But by running 'dd' writers
> > in parallel we can regularly trigger ENOSPC but only for a limited
> > periods of time because each time it opens the same file with O_TRUNC.
> 
> This fails for me on XFS because the fsstress process has already
> finished by the time you try to kill it:
> 
> --- 266.out   2011-11-02 19:46:27.000000000 +0000
> +++ 266.out.bad       2011-11-02 19:48:33.000000000 +0000
> @@ -3,3 +3,4 @@
>  Run fsstress
>   
>  Run dd writers in parallel
> +./266: line 60: kill: (3403) - No such process
Strange... this means that parent process died unexpectedly.
Works fine fore me. In my case this happen once due to unknown
options(new opt " -fsetattr=1" passed to fsstress explicitly) because i've
forget to rebuilt fsstress via make. Can you please explicitly rebuild,
and check one more time to be 100% sure.
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