From: Avi Kivity <avi@qumranet.com>
To: Roland Dreier <rdreier@cisco.com>
Cc: kvm-devel <kvm-devel@lists.sourceforge.net>,
linux-kernel@vger.kernel.org
Subject: Re: [kvm-devel] guest crash on 2.6.20-rc4
Date: Thu, 11 Jan 2007 10:06:20 +0200 [thread overview]
Message-ID: <45A5EFFC.2080609@qumranet.com> (raw)
In-Reply-To: <ada8xgay3b7.fsf@cisco.com>
Roland Dreier wrote:
> > if (is_writeble_pte(*shadow_ent))
> > - return 0;
> > + return 1;
>
> With this patch, it looks like my guest is surviving the load that
> triggered the oops before. So I think this fixes the issue I saw as well.
> I assume you'll send this in for 2.6.20?
>
The patch actually replaces one bug (guest pagefaults on writable dirty
ptes, under certain conditions) with another, rarer one (spinning on a
user-mode pagefault on writable dirty kernel ptes). I'll do it right
and re-test, then send for .20 along with a few friends.
--
error compiling committee.c: too many arguments to function
WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: Roland Dreier <rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
Cc: kvm-devel
<kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: guest crash on 2.6.20-rc4
Date: Thu, 11 Jan 2007 10:06:20 +0200 [thread overview]
Message-ID: <45A5EFFC.2080609@qumranet.com> (raw)
In-Reply-To: <ada8xgay3b7.fsf-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
Roland Dreier wrote:
> > if (is_writeble_pte(*shadow_ent))
> > - return 0;
> > + return 1;
>
> With this patch, it looks like my guest is surviving the load that
> triggered the oops before. So I think this fixes the issue I saw as well.
> I assume you'll send this in for 2.6.20?
>
The patch actually replaces one bug (guest pagefaults on writable dirty
ptes, under certain conditions) with another, rarer one (spinning on a
user-mode pagefault on writable dirty kernel ptes). I'll do it right
and re-test, then send for .20 along with a few friends.
--
error compiling committee.c: too many arguments to function
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next prev parent reply other threads:[~2007-01-11 8:06 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-08 16:18 guest crash on 2.6.20-rc4 Roland Dreier
2007-01-09 8:53 ` [kvm-devel] " Avi Kivity
2007-01-09 8:53 ` Avi Kivity
2007-01-09 21:26 ` [kvm-devel] " Avi Kivity
2007-01-10 18:31 ` Roland Dreier
2007-01-10 21:33 ` Roland Dreier
2007-01-10 21:33 ` Roland Dreier
2007-01-11 8:06 ` Avi Kivity [this message]
2007-01-11 8:06 ` Avi Kivity
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