Bug#433187: linux-2.6 - [sparc64-smp] produces unkillable processes

[Fabio Massimo Di Nitto <fabbione@fabbione.net>]

Martin Zobel-Helas wrote:
> Hi, 
> 
> On Tue Sep 04, 2007 at 10:17:33 +0200, Fabio Massimo Di Nitto wrote:
>> Josip Rodin wrote:
>>> On Tue, Sep 04, 2007 at 06:16:05AM +0200, Fabio Massimo Di Nitto wrote:
>>>>>> #433187 is the bug that has killed the buildds on lebrun and spontini, right?
>>>>> AIUC, yes. at least i can reproduce that on my buildd.
>>>> Hi guys,
>>>>
>>>> We (David Miller and I) are already working on this. We finally got some
>>>> info dump from a debugging patched kernel and I expect we will have a fix
>>>> within the next 3/4 weeks.
>>>> >From our first look it seems like a futex bug and some users have
>>>> reported that the latest 2.6.23-rcX do not show this behavior. Clearly we
>>>> also want to figure out a fix for .22.
>>>>
>>>> Fabio
>>> I should mention that lebrun.d.o is still dead since the last attempt
>>> (ssh unresponsive since 2007-08-30 ~21:25), when it was running a 2.6.22.5
>>> with one davem patch applied (one line in kernel/futex_compat.c). If you
>>> need something more done to lebrun, such as kicking it back to life,
>>> just tell me...
>>>
>> If you have console access, it would be good to get a processor dump by break + p.
> 
> I can easily reproduce that with my Sparc Ultra60 here, which is running
> as buildd for experimental. The machines has the very same problem. I
> will try that tonight.

It is also worth checking with .23-rcX since it has been reported to be working.

> 
> Best you fetch me on IRC, nick zobel on IRCnet, OFTC and freenode.
> 

Unlikely to be around at night. Wife, kid, etc..

> If we can get the patch down to something which can also be applied to
> a plain Etch kernel, i would also speak with Dann if he as Etch Kernel
> Maintainer would be willing to accept the patch for the next point
> release kernel. I (as stable release manager) would be willing to accept
> it, if Dann is supporting this.

I see no problem with this, assuming it is isolated enough.

Fabio

-- 
I'm going to make him an offer he can't refuse.