(9.2) panic under disk load (gam_server / knlist_remove_kq)

[Konstantin Belousov]

On Tue, Jul 16, 2013 at 10:14:36PM +0200, Patrick Lamaiziere wrote:
> Le Tue, 16 Jul 2013 09:05:55 +0300,
> Konstantin Belousov <kostikbel at gmail.com> a ?crit :
> 
> Hello,
> 
> Thanks Konstantin. I'm trying your patch and that looks better.
> poudriere runs since 3 hours now (before the box paniced few minutes
> after I start a poudriere bulk)
> 
> (I've removed the previous change to panic on the warning "WARNING:
> destroying knlist w/ knotes on it!" / I guess it is ok ?)
> 
> As far I can see gamin still works (xfce sees changes and the "testgam"
> tool works fine : https://people.gnome.org/~veillard/gamin/debug.html)
Does stopping the gamin server work as well ?

> 
> I will run few "poudriere bulk" tomorrow and report the result here.  
> 
> I've tried on my workstation at work which uses the same configuration
> as at home, but I was not able to reproduce this problem. The only big
> change is that it has 8 GB RAM versus 4 GB here. I don't know what can
> trigger this panic.
This is something very specific.  E.g., you would not be able to reproduce
the problem easily with tail -F and forced unmount of the volume.  Anyway,
if gamin works and stops normally with the patch, I will just commit it.

> 
> If you have patch to test or idea, please let me know.
> Thanks, regards.
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