Re: ftp server crashes on heavy load: possible scheduler bug

[Zwane Mwaikambo <zwane@arm.linux.org.uk>]

On Fri, 29 Apr 2005, Alexander Nyberg wrote:

> > We've made some changes on our ftp server, and since that it's been crashing 
> > frequently (everyday) with a kernel panic. 
> > 
> > We've configured the 5 IDE 160GB drives into md raid5 arrays with LVM on top 
> > of that. All filesystems are reiserfs. The other change we made to the server 
> > was changing from a patched 2.6.10-ac12 kernel into a newer 2.6.11.7.
> > 
> > Not being able to see the whole stacktrace on screen, we've started a 
> > netconsole to investigate. Started the server and loaded it pretty bad with 
> > rsyncs and such... until it crashed after just 20 minutes.
> > 
> > The netconsole log was surprising - "kernel BUG at kernel/sched.c:2634!"
> > 
> > Any help would be GREATLY appreciated.
> > 
> 
> 
> 5 IDE disks into one MD raid5 into one LVM volume with reiserfs on top
> of it? Could you give me some way to reproduce the specific load you put
> on the machine plus your .config and I'll see what I can do.

Could you also try without CONFIG_4KSTACKS?

Thanks,
	Zwane