qemu-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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
Read my programming blog: http://rwmj.wordpress.com
Fedora now supports 80 OCaml packages (the OPEN alternative to F#)
http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora




reply via email to

[Prev in Thread] Current Thread [Next in Thread]