Date: Tue, 23 Sep 2008 15:56:32 -0400 From: Mikhail Teterin <mi+mill@aldan.algebra.com> To: josh.carroll@gmail.com Cc: stable@freebsd.org, "Paul B. Mahol" <onemda@gmail.com> Subject: Re: 7.0-stable: a hung process - scheduler bug? Message-ID: <48D949F0.10109@aldan.algebra.com> In-Reply-To: <8cb6106e0809231243q3f874ccap50520dde1e0e63b2@mail.gmail.com> References: <48D92589.8000200@aldan.algebra.com> <3a142e750809231125o579445baufb5f2676e4d9a2ca@mail.gmail.com> <48D93914.3020502@aldan.algebra.com> <8cb6106e0809231243q3f874ccap50520dde1e0e63b2@mail.gmail.com>
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Josh Carroll ΞΑΠΙΣΑΧ(ΜΑ):
>> However, what I'm seeing on my system today is evidence of the scheduler
>> having a bug, rather than merely being suboptimal. If the old scheduler is
>> still maintained and supposed to work (however sub-optimally) in 4-CPU
>> configurations, I'd expect either inquiries for more debug-information or
>> assurances, that the bug is known and worked on.
>>
>
> I'm no expert, but I don't think you can necessarily conclude that it
> is the scheduler yet. It very well may be, but I agree that someone
> with more expertise hopefully will ask for more detailed debug/trace
> information to pin down where the problem lies.
>
Although the machine seemed fine, it would not launch new processes ever
since I tried to start `systat 1 -vm' -- something systat does at
start-up must've wedged the system...
A process, that was running (cvs over ssh) is currently stuck (according
to Ctrl-T) in:
load: 0.00 cmd: ssh 59098 [proctree] 0.41u 0.17s 0% 0k
I'll reboot it, when I get back home...
-mi
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