linux-kernel - Re: Many open/close on same files yeilds "No such file or directory".

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Message-ID: <2c0942db0805020847q2fdc0480m3eb892bf2bd0b3a@mail.gmail.com>
Date:	Fri, 2 May 2008 08:47:07 -0700
From:	"Ray Lee" <ray-lk@...rabbit.org>
To:	"Jesper Krogh" <jesper@...gh.cc>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: Many open/close on same files yeilds "No such file or directory".

On Fri, May 2, 2008 at 8:19 AM, Jesper Krogh <jesper@...gh.cc> wrote:
> Jesper Krogh wrote:
>
> >
> > > I'd suspect that after 1e8 loops your CPU got too hot and started to
> > > misbehave.
> > >
> >
> > Hardware is an Sun Fire X4600 (8xdual-core AMD64 processors). The
> > problem seem to be tied to this filesystem. (I cannot havent been able
> > to reproduce it on the /-mounted disk of the same system. So if a cpu
> > problem.. then it shouldn't be tied to a specific filesystem?
> >
> > This is the only activity on the system .. so a load of 1 / 16cpus.
> >
>
>  I've tried to explore this suggestion (the best I could).
>
>  There are 2 ext3 filesystems locally mounted. / and this one. Running 16
> parallel runs of this program on a file on the /-mounted filesystem cannot
> reproduce the problem. If it was linked to hot hardware, I believe I should
> be able to reproduce it this way. The servers are in a 17 degress
> serverroom.
>
>  It changes alot when.. it actually happens. The "earliest ones" has been
> from 200000 cycles.

Run 16 in parallel on /, and another 16 simultaneously on the trouble
filesystem? If you continue to get errors only on the 'trouble'
filesystem, and no errors start occurring on / coincident, then it
sounds pretty localized.

BTW, I may have missed this earlier, but does it happen *anywhere* on
the troublesome filesystem (ie, in a newly created subdirectory)?
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