From: Ian Campbell <Ian.Campbell@citrix.com>
To: Philipp Hahn <hahn@univention.de>
Cc: Ian Jackson <Ian.Jackson@eu.citrix.com>, Xen-devel@lists.xen.org
Subject: Re: xenstored crashes with SIGSEGV
Date: Tue, 16 Dec 2014 10:45:12 +0000 [thread overview]
Message-ID: <1418726712.16425.213.camel@citrix.com> (raw)
In-Reply-To: <548F60BF.4020901@univention.de>
On Mon, 2014-12-15 at 23:29 +0100, Philipp Hahn wrote:
> > I notice in your bugzilla (for a different occurrence, I think):
> >> [2090451.721705] univention-conf[2512]: segfault at ff00000000 ip 000000000045e238 sp 00007ffff68dfa30 error 6 in python2.6[400000+21e000]
> >
> > Which appears to have faulted access 0xff000000000 too. It looks like
> > this process is a python thing, it's nothing to do with xenstored I
> > assume?
>
> Yes, that's one univention-config, which is completely independent of
> xen(stored).
>
> > It seems rather coincidental that it should be accessing the
> > same sort of address and be faulting.
>
> Yes, good catch. I'll have another look at those core dumps.
With this in mind, please can you confirm what model of machines you've
seen this on, and in particular whether they are all the same class of
machine or whether they are significantly different.
The reason being that randomly placed 0xff values in a field of 0x00
could possibly indicate hardware (e.g. a GPU) DMAing over the wrong
memory pages.
Ian.
next prev parent reply other threads:[~2014-12-16 10:45 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-13 7:45 xenstored crashes with SIGSEGV Philipp Hahn
2014-11-13 9:12 ` Ian Campbell
2014-12-12 16:14 ` Philipp Hahn
2014-12-12 16:32 ` Ian Campbell
2014-12-12 16:45 ` Philipp Hahn
2014-12-12 16:56 ` Ian Campbell
2014-12-12 17:20 ` Philipp Hahn
2014-12-12 17:58 ` Ian Campbell
2014-12-15 13:17 ` Ian Campbell
2014-12-15 14:19 ` Philipp Hahn
2014-12-15 14:50 ` Ian Campbell
2014-12-15 17:45 ` Ian Campbell
2014-12-15 22:29 ` Philipp Hahn
2014-12-16 9:51 ` Ian Campbell
2014-12-16 10:25 ` Ian Campbell
2014-12-16 10:45 ` Ian Campbell [this message]
2014-12-16 11:06 ` Ian Campbell
2014-12-16 11:30 ` Frediano Ziglio
2014-12-16 12:23 ` Ian Campbell
2014-12-16 16:13 ` Frediano Ziglio
2014-12-16 16:23 ` Ian Campbell
2014-12-16 16:44 ` Frediano Ziglio
2014-12-17 9:14 ` Frediano Ziglio
2014-12-17 12:43 ` core dump files do not include all CPU registers? Philipp Hahn
2014-12-18 10:20 ` xenstored crashes with SIGSEGV Philipp Hahn
2014-12-18 10:17 ` Ian Campbell
2014-12-18 10:25 ` David Vrabel
2014-12-19 14:30 ` Konrad Rzeszutek Wilk
2014-12-18 10:49 ` Jan Beulich
2014-12-18 10:51 ` Ian Campbell
2014-12-19 12:36 ` Philipp Hahn
2015-01-06 7:19 ` Philipp Hahn
2015-03-12 12:08 ` Philipp Hahn
2015-03-12 18:17 ` Oleg Nesterov
2015-03-12 21:57 ` Philipp Hahn
2014-12-16 12:04 ` Philipp Hahn
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