linux-kernel - Re: 2.6.24-sha1: RIP [<ffffffff802596c8>] iov_iter

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Date:	Wed, 27 Feb 2008 12:41:57 -0500
From:	"Kevin Coffman" <kwc@...i.umich.edu>
To:	"Nick Piggin" <nickpiggin@...oo.com.au>
Cc:	"Alexey Dobriyan" <adobriyan@...il.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, "Kevin Coffman" <kwc@...i.umich.edu>
Subject: Re: 2.6.24-sha1: RIP [<ffffffff802596c8>] iov_iter_advance+0x38/0x70

On Mon, Feb 25, 2008 at 10:46 PM, Nick Piggin <nickpiggin@...oo.com.au> wrote:
> On Wednesday 20 February 2008 09:01, Alexey Dobriyan wrote:
>
> > On Tue, Feb 19, 2008 at 11:47:11PM +0300,  wrote:
>
>  > > > Are you reproducing it simply by running the
>  > > > ftest03 binary directly from the shell? How many times between oopses?
>  > > > It is multi-process but no threads, so races should be minimal down
>  > > > this path -- can you get an strace of the failing process?
>  >
>  > Speaking of multi-proceseness, changing MAXCHILD to 1, nchild to 1,
>  > AFAICS, generates one child which oopses the very same way (in parallel
>  > with generic LTP) But, lowering MAXIOVCNT to 8 generates no oops.
>
>  Thanks, I was able to reproduce quite easily with these settings.
>  I think I have the correct patch now (at least it isn't triggerable
>  any more here).
>
>  Thanks,
>  Nick

Hi Nick,
With this patch, I'm getting "bad data" errors while running the
connectathon tests from a Solaris NFS client to my Linux server.  (The
failing test writes a "big" file (1MB) and reads it back, verifying
the data read back is correct.)  Let me know if I can provide more
details.

K.C.
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