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From: Borislav Petkov <bp@alien8.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Stefan Bader <stefan.bader@canonical.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	kvm@vger.kernel.org, Marcelo Tosatti <mtosatti@redhat.com>,
	MASAO TAKAHASHI <masao-takahashi@kanno.co.jp>,
	Joerg Roedel <joro@8bytes.org>
Subject: Re: Another preempt folding issue?
Date: Wed, 12 Feb 2014 11:40:17 +0100	[thread overview]
Message-ID: <20140212104017.GA5121@pd.tnic> (raw)
In-Reply-To: <20140212103713.GE3545@laptop.programming.kicks-ass.net>

On Wed, Feb 12, 2014 at 11:37:13AM +0100, Peter Zijlstra wrote:
> > Another reporter also saw this on an AMD and said it could not be reproduced on
> > the same hardware and the same software versions when using 64bit instead of 32.
> > 
> > In my case on a 32bit installation I will see this on every invocation of
> 
> Curious.. so its both AMD and Intel.
> 
> That makes funny hardware less likely... but how can the vmexit loose an
> interrupt like this.

Also what I'm wondering about and what's not clear from Stefan's reply
is whether this is purely a 32-bit issue, i.e. a 32-bit host running a
64-bit qemu running a 32-bit iso or what is it?

Or do we have reports for both 32-bit and 64-bit hosts?

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
--

  reply	other threads:[~2014-02-12 10:40 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-02-11 18:34 Another preempt folding issue? Stefan Bader
2014-02-11 19:45 ` Peter Zijlstra
2014-02-12  8:20   ` Stefan Bader
2014-02-12 10:37     ` Peter Zijlstra
2014-02-12 10:40       ` Borislav Petkov [this message]
2014-02-12 11:09         ` Stefan Bader
2014-02-12 11:54           ` Peter Zijlstra
2014-02-13 17:00             ` Stefan Bader
2014-02-13 17:38               ` Peter Zijlstra
2014-02-13 18:03                 ` Stefan Bader
2014-02-13 18:26                   ` Peter Zijlstra
2014-02-14 13:34                     ` Borislav Petkov
2014-02-14 13:40                       ` Stefan Bader
2014-02-14 14:24                       ` Stefan Bader
2014-02-14 14:47                         ` Borislav Petkov
2014-02-14 17:02                           ` Stefan Bader
2014-02-14 17:21                             ` Peter Zijlstra
2014-02-20 15:38                               ` Stefan Bader
2014-02-20 15:50                                 ` Peter Zijlstra
2014-03-24 17:39                                   ` Paolo Bonzini
2014-03-25  8:23                                     ` Stefan Bader
2014-02-14 17:33                             ` Borislav Petkov
2014-02-14 18:23                               ` Stefan Bader
2014-02-14 19:03                                 ` Stefan Bader
2014-02-14 15:21                         ` Another preempt folding issue? (maybe bisect) Borislav Petkov
2014-02-14 15:28                           ` Stefan Bader
2014-02-14 15:44                             ` Borislav Petkov
2014-02-14 16:21                           ` Peter Zijlstra
2014-02-13 18:25               ` Another preempt folding issue? Peter Zijlstra
2014-02-14 10:55                 ` Stefan Bader
2014-02-14 13:17                   ` Peter Zijlstra
2014-02-14 11:24                 ` Stefan Bader
2014-02-14 11:49                   ` Peter Zijlstra
2014-02-12 11:12         ` Joerg Roedel

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