linux-kernel - Re: possible recursive locking detected - while running fs operations in loops

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Date:	Sun, 30 Jul 2006 00:18:50 +0200
From:	"Jesper Juhl" <jesper.juhl@...il.com>
To:	"Jesper Juhl" <jesper.juhl@...il.com>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Hans Reiser" <reiser@...esys.com>,
	"Alexander Viro" <viro@...iv.linux.org.uk>,
	"Al Viro" <viro@....linux.org.uk>, reiserfs-dev@...esys.com,
	reiserfs-list@...esys.com
Subject: Re: possible recursive locking detected - while running fs operations in loops - 2.6.18-rc2-git5

On 26/07/06, Andreas Dilger <adilger@...sterfs.com> wrote:
> On Jul 26, 2006  00:16 +0200, Jesper Juhl wrote:
> > What I did to provoke it was to run 6 different xterms (with a bash
> > shell) with the following loops in them in a test directory that was
> > initially empty :
> >
> > xterm1:   while true; do mkdir a; done
> > xterm2:   while true; do rmdir a; done
> > xterm3:   while true; do touch a/foo; done
> > xterm4:   while true; do find .; done
> > xterm5:   while true; do sync; sleep 1; done
> > xterm6:   while true; do rm -r a; done
>
> See racer test at ftp.lustre.org/pub/benchmarks/racer-lustre.tar.gz
>
> It does the above, but a bunch more things and is a truly pathalogical
> test script that does lots of "stupid user tricks", unlike normal tests
> which are only doing operations that expect to be successful.
>
> PS - during the racer.sh test run "rm" is known to segfault after hitting
>      an internal assertion, nobody is sure why.
> PPS- I don't know who wrote this program, it was originally posted by
>      someone not the author to linux-fsdevel or something.
>

Thanks. That's a nice little test suite.

-- 
Jesper Juhl <jesper.juhl@...il.com>
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