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Re: [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support bootin
From: |
Alexander Graf |
Subject: |
Re: [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support booting from SCSI disk image |
Date: |
Wed, 18 Aug 2010 17:16:56 +0200 |
On 18.08.2010, at 17:08, Paul Brook wrote:
>> The qemu-kvm could boot from SCSI disk image by utilizing seabios, this
>> patch ported codes
>> from qemu-kvm to let upstream qemu to support booting from SCSI disk image.
>
> No. This has nothing to do with SCSI.
>
> What it does is add a really cheap and nasty block storage device that
> aliases
> one of the other block devices in the system. This is bad. The OS has no way
> of knowing which devices are aliased, and we really don't want yet another
> braindead guest visible interface (c.f. recent performance issues where -
> kernel/fw_cfg were being abused)
>
> This has been discussed several times before. The proper solution is to teach
> the bios how to boot off SCSI devices. IIRC support for virtio devices
> already
> exists, implementing support for the SCSI controller shouldn't be that much
> harder.
Couldn't we just have an option rom for the SCSI controller? The same way the
VGABIOS is a rewrite of a VGA BIOS for the Cirrus Logic...
Alex
- [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support booting from SCSI disk image, Hai Shan Bai, 2010/08/17
- Re: [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support booting from SCSI disk image, haishan, 2010/08/17
- Re: [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support booting from SCSI disk image, Paul Brook, 2010/08/18
- Re: [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support booting from SCSI disk image,
Alexander Graf <=
- Re: [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support booting from SCSI disk image, Paul Brook, 2010/08/18
- Re: [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support booting from SCSI disk image, Gerd Hoffmann, 2010/08/20
- Re: [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support booting from SCSI disk image, Anthony Liguori, 2010/08/20
- Re: [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support booting from SCSI disk image, Gerd Hoffmann, 2010/08/20
- Re: [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support booting from SCSI disk image, Anthony Liguori, 2010/08/20
- Re: [Qemu-devel] [PATCH - V3] Port codes from qemu-kvm to support booting from SCSI disk image, Kevin O'Connor, 2010/08/21