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Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2
From: |
Alexander Graf |
Subject: |
Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35? |
Date: |
Wed, 4 Aug 2010 19:36:58 +0200 |
On 04.08.2010, at 19:36, Anthony Liguori wrote:
> On 08/04/2010 12:31 PM, Alexander Graf wrote:
>> On 04.08.2010, at 19:26, Anthony Liguori wrote:
>>
>>
>>> On 08/04/2010 11:45 AM, Alexander Graf wrote:
>>>
>>>> Frankly, I partially agreed to your point when we were talking about 300ms
>>>> vs. 2 seconds. Now that we're talking 8 seconds that whole point is moot.
>>>> We chose the wrong interface to transfer kernel+initrd data into the guest.
>>>>
>>>> Now the question is how to fix that. I would veto against anything
>>>> normally guest-OS-visible. By occupying the floppy, you lose a floppy
>>>> drive in the guest. By occupying a disk, you see an unwanted disk in the
>>>> guest.
>>>>
>>>
>>> Introduce a new virtio device type (say, id 6). Teach SeaBIOS that 6 is
>>> exactly like virtio-blk (id 2). Make it clear that id 6 is only to be used
>>> by firmware and that normal guest drivers should not be written for id 6.
>>>
>> Why not make id 6 be a fw_cfg virtio interface?
>
> Because that's a ton more work and we need fw_cfg to be available before PCI
> is. IOW, fw_cfg cannot be a PCI interface.
in addition to fw_cfg. So you'd have the same contents be exposed using both
interfaces.
Alex
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, (continued)
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Alexander Graf, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, David S. Ahern, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Richard W.M. Jones, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Anthony Liguori, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Alexander Graf, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Anthony Liguori, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?,
Alexander Graf <=
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Richard W.M. Jones, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Alexander Graf, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Anthony Liguori, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Alexander Graf, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Avi Kivity, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Anthony Liguori, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Richard W.M. Jones, 2010/08/04
- Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?, Gleb Natapov, 2010/08/04