Re: [Xen-users] Advice on compiling Xen 4.1.2 on Debian 6.0.4 Kernel 3.1.12

[Teck Choon Giam <giamteckchoon@xxxxxxxxx>]

On Thu, Apr 12, 2012 at 10:16 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> (please don't drop people from the CC line)
>
> On Thu, 2012-04-12 at 13:46 +0100, cyberhawk001@xxxxxxxxx wrote:
>> >> 8.) Rebooted into kernel 3.3.1 with Xen 4.1 AND recorded the trace
>> >> log, which ended with a KERNEL PANIC
>> > A bug was introduce into 3.1.12. A fix is in the pipeline for the next
>> > update but in the meantime you can try reverting:
>> >
>> > commit 73d63d038ee9f769f5e5b46792d227fe20e442c5
>> > Author: Suresh Siddha<suresh.b.siddha@xxxxxxxxx>
>> > Date:   Mon Mar 12 11:36:33 2012 -0700
>> >
>> >      x86/ioapic: Add register level checks to detect bogus io-apic entries
>> >
>> > (I don't seem to see anything newer than 3.1.10 in the git tree, how
>> > odd)
>> >
>> > Ian.
>>
>>
>> AHH ok i see, so this bug goes back that far in the Kernel revisions.
>
> Actually, I think I misspoke in a confusing way.
>
> A patch was recently added upstream which broke Xen support in the Linux
> kernel. It was unfortunately then backported to various stable (3.x.y)
> trees. If you go back one version from the latest on any of those then
> you should be ok.
>
> v3.4-rc1 was buggy but AFAIK v3.4-rc2 is OK.
>
> It seems that v3.3.1 and v3.2.14 both got the bad backport. However
> 3.3.0 and 3.2.13 should both be OK as far as I know. I expect that 3.3.2
> and 3.2.15 will get the fix too.

Yes, it is in stable queue tree and it currently under review/rc:

http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git;a=blob;f=queue-3.0/revert-x86-ioapic-add-register-level-checks-to-detect.patch;h=8918314741edb229d6fbaeb0b634753ad927fda1;hb=1c23e65fb052a6e31ac7fb67ceb9bdb3afda1dc3

http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git;a=blob;f=queue-3.2/revert-x86-ioapic-add-register-level-checks-to-detect.patch;h=0b24a11689a78b410633bd67e8887957d2be747b;hb=1c23e65fb052a6e31ac7fb67ceb9bdb3afda1dc3

http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git;a=blob;f=queue-3.3/revert-x86-ioapic-add-register-level-checks-to-detect.patch;h=656fb3d8dc220dc57f7f0ad2fb7aeda290578dab;hb=1c23e65fb052a6e31ac7fb67ceb9bdb3afda1dc3

Thanks.

Kindest regards,
Giam Teck Choon


>
>> So, the kernel that comes compiled with Debian Wheezy is Kernel 3.2.0.2,
>
>> is that bug in that version as well or it has been patched / fixed. I
>> have tried before to use Wheezy with the kernel they have for it,
>> 3.2.0.2 and install Xen 4.1 from Synaptic and all that, still didn't
>> boot. BUT, that was before when i didn't have the Serial Console Setup
>> yet, so don't know what the error messages where.
>
> The last ".2" should be "-2" and is the Debian revision. The underlying
> kernel would be 3.2.0. I don't think 3.2.0 has the bug mentioned above,
> but it may well have had some other.
>
> Wheezy right now has 3.2.12-2 which I think should be OK.
>
>> IF Kernel 3.1.10 does not have those kind of bugs,
>
> v3.1.10 doesn't look to have the error in question. But actually I'm not
> sure where 3.1.10 comes from, the only mention of 3.1.y is 3.1.12 in
> your subject line (which is what confused me when I could only find
> 3.1.10, since 3.1.10 is actually the latest) but your text only refers
> to 3.3.1 anyway so the mention of 3.1.12 seem to be entirely spurious.
> As noted above 3.3.1 has the bug, while 3.3.0 does not.
>
> Ian.
>
>
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