RELENG_6 panic under heavy load

[Dmitriy Kirhlarov]

On Thu, Dec 07, 2006 at 11:18:52AM +0800, David Xu wrote:
> On Thursday 16 November 2006 19:15, Gleb Smirnoff wrote:
> > On Thu, Nov 16, 2006 at 01:24:36PM +0300, Gleb Smirnoff wrote:
> > T>   I wonder why UMA was suspected to be the problem. Dima gave
> > T> me access to the core. Here are more details from the trace:
> >
> > It looks like a race between two threads in one process. Look here:
> >
> Can you try the patch ?
> http://people.freebsd.org/~davidxu/patch/ksegrp_preempt.patch 

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.

WBR
Dmitriy