Re: ULE/SCHED_SMP diff for 7.0

From: Attilio Rao <attilio_at_FreeBSD.org>
Date: Thu, 19 Jul 2007 00:57:40 +0200
Rene Ladan wrote:
> Jeff Roberson schreef:
>> On Wed, 18 Jul 2007, Rene Ladan wrote:
>>
>>> Jeff Roberson schreef:
>>>> http://people.freebsd.org/~jeff/ule.diff
>>>>
>>>> This patch is scheduled for inclusion in 7.0.  I would like anyone who
>>>> cares to run it to validate that it does not create any stability or
>>>> performance regression over the existing ULE.  This patch replaces ULE
>>>> with SCHED_SMP, which will now no longer exist as a seperate fork of
>>>> ULE.
>>> [..]
>>>
>>> I cvsupped this evening at 19:34 UTC.  The new ULE scheduler works fine
>>> in single-user mode (it survives "make kernel"), but when I go to
>>> multi-user mode I get a "sched_add: trying to run inhibited thread"
>>> panic (2 vmcores lost due to fsck :( )
>> Can you get me a backtrace?  You can enable KDB and DDB in your kernel
>> along with INVARIANTS.  Just type 'tr' and record the function names
>>
> 
> I found a file #165060 in /var/lost+found .  kgdb didn't eat it, but strings
> could still extract the attached backtrace.  In case you want to recompile
> the kernel, it is compiled with -O1 -pipe -march=prescott
> -fno-strict-aliasing

Are you using libkse?
I think this problem is linked to other KSE locking issue we are 
currently experiencing and that I'm trying to fix (a little bit time 
constrained now).

Attilio
Received on Wed Jul 18 2007 - 20:58:28 UTC

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