FAQ Search Today's Posts Mark Forums Read
» Video Reviews

» Linux Archive

Linux-archive is a website aiming to archive linux email lists and to make them easily accessible for linux users/developers.


» Sponsor

» Partners

» Sponsor

Go Back   Linux Archive > Ubuntu > Ubuntu Kernel Team

 
 
LinkBack Thread Tools
 
Old 02-10-2009, 11:47 AM
Scott James Remnant
 
Default Review of Arjan's "fast boot" patches for 2.6.28

Summary: STAY AWAY!

I merged Arjan's fast boot patches from
ssh://master.kernel.org/pub/scm/linux/kernel/git/arjan/linux-2.6-async.git into the Jaunty kernel tree and rebuilt.

The effect was that my root filesystem failed to mount unless I boot
without "quiet".

At a rough stabbing guess, it finishes the kernel init when the PCI
probe completes without waiting for the SCSI probe or something -- so if
the kernel boots particularly fast, it won't have found your root disk.

So, ironically, these patches make an initramfs necessary (I wasn't
using one).


He may have fixed this in the 2.6.29 patch set, I'll test that for
karmic.

We should probably ask him about this on Friday anyway.

Scott
--
Scott James Remnant
scott@canonical.com
--
kernel-team mailing list
kernel-team@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/kernel-team
 
Old 02-10-2009, 01:53 PM
Tim Gardner
 
Default Review of Arjan's "fast boot" patches for 2.6.28

Scott James Remnant wrote:
> Summary: STAY AWAY!
>
> I merged Arjan's fast boot patches from
> ssh://master.kernel.org/pub/scm/linux/kernel/git/arjan/linux-2.6-async.git into the Jaunty kernel tree and rebuilt.
>
> The effect was that my root filesystem failed to mount unless I boot
> without "quiet".
>
> At a rough stabbing guess, it finishes the kernel init when the PCI
> probe completes without waiting for the SCSI probe or something -- so if
> the kernel boots particularly fast, it won't have found your root disk.
>
> So, ironically, these patches make an initramfs necessary (I wasn't
> using one).
>
>
> He may have fixed this in the 2.6.29 patch set, I'll test that for
> karmic.
>
> We should probably ask him about this on Friday anyway.
>
> Scott
>

Architecturally, Arjan's approach makes sense. The asynchronicity of
this startup infrastructure is exposing faults in the underlying device
drivers and subsystems. I expect it will take a couple of releases
before all of the kinks are worked out. Perhaps by 2.6.30 or .31 ...

rtg
--
Tim Gardner tim.gardner@canonical.com

--
kernel-team mailing list
kernel-team@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/kernel-team
 

Thread Tools




All times are GMT. The time now is 05:52 AM.

VBulletin, Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2007, Crawlability, Inc.
Copyright 2007 - 2008, www.linux-archive.org