From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rolf Eike Beer <eike-kernel@sf-tec.de>
Subject: Re: 3.12.8 is doing nasty things
Date: Tue, 25 Feb 2014 18:13:32 +0100
Message-ID: <5116135.sX67MB4Kjr@caliban.sf-tec.de>
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Am Samstag, 15. Februar 2014, 08:47:06 schrieb Rolf Eike Beer:
> Am Donnerstag, 13. Februar 2014, 07:37:55 schrieb Rolf Eike Beer:
> > Am Dienstag, 11. Februar 2014, 16:30:08 schrieb Rolf Eike Beer:
> > > > Next week I'll try 3.13, but since it has the same changes I expect
> > > > the
> > > > same results.
> > > 
> > > I'm now on 3.13.2 and things are similar. While I did an initial test
> > > with
> > > 100 invocations of ssh which went flawlessly I now see random process
> > > errors again. Examples can be found here:
> > > http://my.cdash.org/index.php?project=Qsmtp&date=2014-02-11
> > > 
> > > Normally the reports should have arrived much earlier, but for an
> > > unknown
> > > reason the resolv.conf (generated by DHCP) was empty, I assume that the
> > > DHCP process has failed during while renewing the IP address. The
> > > segfaults during the build have not happened with the older kernel.
> > 
> > I can now confirm that the cache coherency fixes are _not_ the reason for
> > those failures I see. I have rebuild 3.13.2 without them and still see
> > random segfaults in my dashboards. I'll try the mmap() patch next.
> 
> After 2,5 days with 3.13.2 and 0576da2c08e3d332f1b0653030d28ab804585ab6 I
> have not yet seen a single random segfault.

A short update on this: I am still running on that kernel and have not seen a 
single random process crash since then. I'm willing to help in debugging this 
if anyone tells me how, but I will now just revert that patch from every new 
kernel to get a stable machine.

Greetings,

Eike
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