linux-kernel - Re: [BUG?] sendfile / distcc

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Message-Id: <1221205558.6407.3.camel@twins.programming.kicks-ass.net>
Date:	Fri, 12 Sep 2008 09:45:58 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [BUG?] sendfile / distcc

On Thu, 2008-09-11 at 10:26 +0200, Peter Zijlstra wrote:
> On Wed, 2008-09-10 at 23:44 -0700, Andrew Morton wrote:
> > On Wed, 10 Sep 2008 11:27:51 +0200 Peter Zijlstra <peterz@...radead.org> wrote:
> > 
> > > Hi,
> > > 
> > > I've been seeing this for a while now, but its still present with -rc5+
> > > kernels. Its always the local machine failing, never the remotes.
> > > 
> > > [root@...ns linux-2.6-rt]# nice ./k opteron build
> > > time distmake x86_64 O=opteron-build ARCH=x86_64
> > > testing twins:    distccd running
> > > testing opteron:  DOWN
> > > testing taijtu:   distccd running
> > > testing dyad:     distccd running
> > > testing lappy:    host running
> > > testing ubuntu:   host running
> > > DISTCC_HOSTS= twins/8 taijtu/32 dyad/32
> > > DISTCC_DIR=/dev/shm/distcc
> > > DISTCC_SLOTS=72
> > > 
> > > ...
> > > 
> > > distcc[9931] (dcc_writex) ERROR: failed to write: Connection reset by peer
> > > distcc[9931] Warning: failed to distribute /mnt/build/linux-2.6-rt/kernel/fork.c to twins/8, running locally instead
> > > 
> > > ...
> > > 
> > > distcc[12078] (dcc_pump_sendfile) ERROR: sendfile failed: Connection reset by peer
> > > distcc[12078] (dcc_readx) ERROR: unexpected eof on fd4
> > > distcc[12078] (dcc_r_token_int) ERROR: read failed while waiting for token "DONE"
> > > distcc[12078] Warning: failed to distribute /mnt/build/linux-2.6-rt/init/version.c to twins/8, running locally instead
> > > 
> > 
> > distcc is very good at breaking networking.  I assume 2.6.26 is OK?
> 
> I think it was - whew .26 was a long time ago already ;-)
> 
> I'll build and boot one today to confirm.

It seems I can reproduce similar errors with .26 - I'll be traveling
soon and this box is one of those without serial console so It'll have
to wait until I get back.

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