Re: [Xen-devel] Kernel aio bug in Debian 2.6.32-5-xen kernel?

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2012-04-26 at 12:08 +0100, George Dunlap wrote:
> On Thu, Apr 26, 2012 at 11:59 AM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> 
> wrote:
> > On Thu, 2012-04-26 at 11:52 +0100, George Dunlap wrote:
> >> Recently I pulled in new changesets from xen- and qemu-unstable, and
> >> when creating a PV guest I'm getting errors like the stack trace
> >> below.  Is this likely to be caused by QEMU using AIO?  It this a bug
> >> in Xen or in the Debian kernel?  Is there an easy way to turn off aio
> >> using a config file so I can see if it is qemu's aio?
> >>
> >> The config file is attached, for reference.
> >
> > Which revision of the Debian kernel is this?
> >
> > It looks like Squeeze, which was a fairly old snapshot of Jeremy's
> > Xen.git -- it's certainly not impossible that there were latent AIO bugs
> > in there and Stefano has been fixing these sort of things in recent
> > kernels too. So it's very possible we need to backport some fix.
> 
> The package info is below.  It is from squeeze, since (AFAIK) that's
> the latest "stable" release (and thus what people are likely to be
> using)

Right, it's also the latest available kernel package for Squeeze, which
is what I wanted to check. Not that I've been aware of any AIO fixes
recently anyway.

> 
>  -George
> 
> # dpkg -s linux-image-2.6.32-5-xen-686
> Package: linux-image-2.6.32-5-xen-686
> Status: install ok installed
> Priority: optional
> Section: kernel
> Installed-Size: 78524
> Maintainer: Debian Kernel Team <debian-kernel@xxxxxxxxxxxxxxxx>
> Architecture: i386
> Source: linux-2.6
> Version: 2.6.32-41
> Provides: linux-image, linux-image-2.6, linux-modules-2.6.32-5-xen-686
> Depends: module-init-tools, linux-base (>= 2.6.32-41), initramfs-tools (>= 
> 0.55)
> Pre-Depends: debconf | debconf-2.0
> Recommends: firmware-linux-free (>= 2.6.32), libc6-xen
> Suggests: linux-doc-2.6.32, grub
> Breaks: initramfs-tools (<< 0.55), lilo (<< 22.8-8.2~)
> Description: Linux 2.6.32 for modern PCs, Xen dom0 support
>  The Linux kernel 2.6.32 and modules for use on PCs with Intel Pentium
>  Pro/II/III/4/4M/D/M, Xeon, Celeron, Core or Atom; AMD Geode NX, Athlon
>  (K7), Duron, Opteron, Sempron, Turion or Phenom; Transmeta Efficeon; or
>  VIA C7 processors.
>  .
>  This kernel also runs on a Xen hypervisor.  It supports both privileged
>  (dom0) and unprivileged (domU) operation.



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