From: Avi Kivity <avi@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Glauber Costa <glommer@redhat.com>,
Alexander Graf <agraf@suse.de>,
Juan Quintela <quintela@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 0/6] Fix -kernel with SeaBIOS v2
Date: Mon, 30 Nov 2009 20:54:42 +0200 [thread overview]
Message-ID: <4B1414F2.6030901@redhat.com> (raw)
In-Reply-To: <20091130185028.GA1495@lst.de>
On 11/30/2009 08:50 PM, Christoph Hellwig wrote:
>
>> Sounds like your guest kernel is trying to access an x86_64 register?
>>
>> You can of cause try insmod'ing kvm.ko with ignore_msrs=1. You hopefully
>> don't need syscalls until you get into user space.
>>
> The option doesn't exist yet in 2.6.31 which I'm running on this box
> because 2.6.32-rc has massive regressions for my workload. I booted
> into it again anyway to test the option - and interestingly enough
> qemu with -enable-kvm boots just fine even without ignore_msrs=1.
>
> Looks like the problem only happens with older kernels.
>
Strange - qemu -kernel has zero interaction with the host kernel. It's
a totally normal boot process.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
next prev parent reply other threads:[~2009-11-30 18:54 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-12 20:53 [Qemu-devel] [PATCH 0/6] Fix -kernel with SeaBIOS v2 Alexander Graf
2009-11-12 20:53 ` [Qemu-devel] [PATCH 1/6] Make fw_cfg interface 32-bit aware Alexander Graf
2009-11-13 0:48 ` [Qemu-devel] " Glauber Costa
2009-11-13 6:15 ` Alexander Graf
2009-11-13 10:59 ` Juan Quintela
2009-11-14 10:13 ` Alexander Graf
2009-11-12 20:53 ` [Qemu-devel] [PATCH 2/6] Introduce rom_rom Alexander Graf
2009-11-12 20:53 ` [Qemu-devel] [PATCH 3/6] Convert multiboot to fw_cfg backed data storage Alexander Graf
2009-11-12 20:53 ` [Qemu-devel] [PATCH 4/6] Move common option rom code to header file Alexander Graf
2009-11-12 20:53 ` [Qemu-devel] [PATCH 5/6] Convert linux bootrom to external rom and fw_cfg Alexander Graf
2009-11-13 6:37 ` [Qemu-devel] " Paolo Bonzini
2009-11-25 10:38 ` Alexander Graf
2009-11-25 12:49 ` [Qemu-devel] [PATCH] Fix thinko in linuxboot.S Paolo Bonzini
2009-11-25 12:53 ` [Qemu-devel] " Alexander Graf
2009-11-25 13:21 ` Paolo Bonzini
2009-11-12 20:53 ` [Qemu-devel] [PATCH 6/6] Add linuxboot to BLOBS Alexander Graf
2009-11-18 19:02 ` [Qemu-devel] [PATCH 0/6] Fix -kernel with SeaBIOS v2 Christoph Hellwig
2009-11-18 19:55 ` Anthony Liguori
2009-11-18 20:06 ` Christoph Hellwig
2009-11-18 22:06 ` Anthony Liguori
2009-11-20 9:12 ` Christoph Hellwig
2009-11-20 10:53 ` Alexander Graf
2009-11-20 11:31 ` Christoph Hellwig
2009-11-20 11:34 ` Alexander Graf
2009-11-20 13:53 ` Anthony Liguori
2009-11-23 20:21 ` Christoph Hellwig
2009-11-23 21:28 ` Alexander Graf
2009-11-23 21:36 ` Christoph Hellwig
2009-11-25 9:58 ` Alexander Graf
2009-11-26 11:42 ` Christoph Hellwig
2009-11-26 12:00 ` Alexander Graf
2009-11-26 12:18 ` Christoph Hellwig
2009-11-26 12:24 ` Alexander Graf
2009-11-30 18:50 ` Christoph Hellwig
2009-11-30 18:54 ` Avi Kivity [this message]
2009-12-11 16:39 ` Christoph Hellwig
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