From mboxrd@z Thu Jan  1 00:00:00 1970
From: Oleg Nesterov <oleg@redhat.com>
Subject: Re: xenstored crashes with SIGSEGV
Date: Thu, 12 Mar 2015 19:17:05 +0100
Message-ID: <20150312181705.GA14382@redhat.com>
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To: Philipp Hahn <hahn@univention.de>
Cc: Ian Campbell <Ian.Campbell@citrix.com>, George Dunlap <george.dunlap@eu.citrix.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>, Xen-devel@lists.xen.org, David Vrabel <david.vrabel@citrix.com>, Jan Beulich <JBeulich@suse.com>, Frediano Ziglio <freddy77@gmail.com>
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On 03/12, Philipp Hahn wrote:
>
> Have you seen any other corruption

No,

> or is one of your patches likely to
> fix something like the issue mentioned above:

I am not sure I even understand the problem above ;) I mean, after the quick
look I do not see how this connects to FPU. $rdi == 2 looks obviously wrong.

> > $ git l1 --grep fpu v3.10.. -- arch/x86
> > c7b228a Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
> > dc56c0f x86, fpu: Shift "fpu_counter = 0" from copy_thread() to arch_dup_task_struct()
> > 5e23fee x86, fpu: copy_process: Sanitize fpu->last_cpu initialization
> > f185350 x86, fpu: copy_process: Avoid fpu_alloc/copy if !used_math()
> > 31d9633 x86, fpu: Change __thread_fpu_begin() to use use_eager_fpu()

This is only cleanups... I do not think this series can fix something.

Oleg.