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Re: XFS 1.1 and pre-emptible kernel???

To: rjmx@xxxxxxxx
Subject: Re: XFS 1.1 and pre-emptible kernel???
From: Eric Sandeen <sandeen@xxxxxxx>
Date: 15 Jul 2002 11:41:22 -0500
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <87it3hhs1o.wl@xxxxxxxxxxxxxx>
References: <87it3hhs1o.wl@xxxxxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
Hi Ron -

I tested pre-empt with xfs a week or two ago, and I did get some of
these "<process> exited with preempt_count x" messages.

On the other hand, I then tested with a vanilla ext2 kernel + pre-empt,
and got the same messages.

So, I don't think the problem is unique to, or necessarily even caused
by, XFS.  What processes complained of non-zero preempt_counts?  Can you
run these same tests on an ext[2,3]-only box, without xfs patches?

-Eric

On Mon, 2002-07-15 at 11:30, Ron Murray wrote:
> I'm running a 2.4.18 kernel with XFS 1.1 and the pre-emptible kernel
> patch. If I create an XFS filesystem on /var, any process I run on the
> machine runs ok (as far as I can tell), but gives a
> 
>    <process> exited with preempt_count x
> 
> error on exit (where x > 1).
> 
>    Some digging at google turned up a suggestion that the XFS
> developers were aware of the problem, and that it had been fixed in
> CVS (this some time in early April), although nothing shows up in a
> search of this mailing list.
> 
>    I'd rather not try the current CVS version of XFS (don't trust
> pre-release kernels!), but I'm curious to see if it's been fixed (and
> I can wait till the official 2.4.19 kernel release and XFS patches).
> 
>    Is it better now?
> 
>  .....Ron
> 



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