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Date: Tue, 12 Dec 2006 16:09:38 +0300
From: Dmitriy Kirhlarov <dimma@higis.ru>
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Subject: Re: RELENG_6 panic under heavy load
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On Tue, Dec 12, 2006 at 08:49:21PM +0800, David Xu wrote:

> > I've tested it. This patch works also, but with a little bit different
> > behaviour. With patch from jhb@ I got LA 7-8, with this patch I have
> > LA 5-6, same as on unpatched system. But it seems to me, that system
> > is less interactive, compared to jhb@ patch.
> 
> jhb patch is incomplete, it implies that every place a thread is doing state
> transition and waking another thread up should be patched, there is
> other code in kern_sig.c unpatched, though I don't know other places,
> but the code maybe_preempt_in_ksegrp should be synced with
> maybe_preempt, it should fix all problems. the LA you have seen is lower
> than jhb might be a nature of KSEGRP, but I am not sure, if you program
> forces all threads to be system-scope, it might fix the problem. 

I think, kern/105464 can be closed, after commit your patch.

WBR.
Dmitriy