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[Xen-devel] Re: pv_ops dom0 USB fixed

  • To: "Jeremy Fitzhardinge" <jeremy@xxxxxxxx>
  • From: "Todd Deshane" <deshantm@xxxxxxxxx>
  • Date: Wed, 10 Dec 2008 17:48:37 -0500
  • Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Aviv Grafi <aviv@xxxxxxxxxxxx>
  • Delivery-date: Wed, 10 Dec 2008 14:49:17 -0800
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On Wed, Dec 10, 2008 at 3:05 PM, Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
> Ian Campbell noticed a missing TLB flush which was causing the USB
> crashes/failures when booting the pvops dom0 kernel.  With that fixed,
> enabling USB boots reliably and seems to work.
> Its quite possible this will also improve matters with ATA/SATA controllers,
> though I haven't tested it so far.
> Anyway, its a significant fix and its worth trying the current pvops patch
> queue again.  Please tell me what you find.

Looks like some progress has been made.

Two logs attached.

The first, with both CPUs enabled give a pretty hard crash.
(Maybe some indication of an SMP problem)

The second, with nosmp on the dom0 kernel command line
sitll doesn't fully boot, but look like it picks up the device, just
that it is picking it up late maybe.

Notice toward the end of boot that it goes to a busybox

"ALERT! /dev/sda1 does not exist. Dropping to a shell!

BusyBox v1.10.2 (Ubuntu 1:1.10.2-1ubuntu6) built-in shell (ash)
Enter 'help' for a list of built-in commands.


Then ATA stuff that keeps trying...

Let me know what you guys think.


Todd Deshane

Attachment: xenboot.with-new-fix
Description: Binary data

Attachment: xenboot-with-new-fix.nosmp
Description: Binary data

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