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Re: [Qemu-devel] Re: Need a way disable gPXE boot
From: |
Richard W.M. Jones |
Subject: |
Re: [Qemu-devel] Re: Need a way disable gPXE boot |
Date: |
Wed, 10 Mar 2010 10:00:21 +0000 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Tue, Mar 09, 2010 at 09:35:11PM -0600, Anthony Liguori wrote:
> On 03/09/2010 08:11 AM, Richard W.M. Jones wrote:
>> Did anyone attempt this?
>>
>> I noticed also with libguestfs that boot times have spiralled out of
>> control again, and it seems to be down to the SeaBIOS change. SeaBIOS
>> accounts for _9_ seconds of the boot sequence, up from very small
>> (fraction of a second) for the old Bochs BIOS[1].
>>
>> rm -rf /usr/share/gpxe directory reduces the SeaBIOS share of the boot
>> time down to about 5 seconds, but that's still a huge regression
>> compared to the old Bochs BIOS.
>>
>
> Sounds like you're using a distro and that the distro has improperly
> built the GPXE binaries. We don't look for roms in /usr/share/gpxe in
> upstream...
>
> For the ROMs we ship, we set BANNER_TIMEOUT=0.
>
> You should file a bug against your distro and try to reproduce with an
> upstream build. SeaBIOS takes no time at all with upstream.
Yes, you're right, I was totally wrong to be blaming SeaBIOS here,
which is actually a nicely written bit of code. I filed a bug with
Fedora:
https://bugzilla.redhat.com/show_bug.cgi?id=572104
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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