From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 54061] guest panic after live migration
Date: Mon, 25 Feb 2013 08:26:26 +0000 (UTC)
Message-ID: <20130225082626.C27BA11FC85@bugzilla.kernel.org>
References:
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
To: kvm@vger.kernel.org
Return-path:
Received: from mail.kernel.org ([198.145.19.201]:56716 "EHLO mail.kernel.org"
rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
id S1756633Ab3BYI03 (ORCPT );
Mon, 25 Feb 2013 03:26:29 -0500
Received: from mail.kernel.org (localhost [127.0.0.1])
by mail.kernel.org (Postfix) with ESMTP id C37F3202D8
for ; Mon, 25 Feb 2013 08:26:27 +0000 (UTC)
Received: from bugzilla.kernel.org (bugzilla.kernel.org [198.145.19.217])
by mail.kernel.org (Postfix) with ESMTP id C8ACD202C3
for ; Mon, 25 Feb 2013 08:26:26 +0000 (UTC)
In-Reply-To:
Sender: kvm-owner@vger.kernel.org
List-ID:
https://bugzilla.kernel.org/show_bug.cgi?id=54061
--- Comment #3 from Anonymous Emailer 2013-02-25 08:26:26 ---
Reply-To: xiaoguangrong@linux.vnet.ibm.com
On 02/20/2013 04:06 PM, bugzilla-daemon@bugzilla.kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=54061
>
>
>
>
>
> --- Comment #2 from Jay Ren 2013-02-20 08:06:16 ---
> Marcleo,
>
> yes, after reverting that commit "caf6900f2d8", live-migration can work fine.
>
Sorry for the wrong patch and the bug is: the fast page fault path
can make large-spte writeable without probably set dirty bitmap for
all small pages.
Two ways to fix these:
1): covert the large-spte to small sptes and wirte-protect them, then
no readonly large-spte exists.
2): only allow fast page fault to fix #PF on small spte.
Seems the first way is better because the second way can cause useless
page table waking.
--
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.