SMP and IP_PREEMPTION

[John Baldwin]

On Monday 06 March 2006 11:49, JoaoBR wrote:
> 
> Hi
> I would like to here your opinion about a problem I may have.
> 
> I experience sudden reboot, no panic, no message at all on SMP systems 
> (releng_6 up-to-date) when the kernel is compiled with
> 
> PREEMPTION
> IPI_PREEMPTION
> SMP
> 4BSD
> 
> 
> Appearently the reboot occures when the system goes to use almost 2GB of RAM.
> 
> I am not so sure but appearently the problem is less with ULE and seems to 
> disappear with ULE and without IPI_PREEMPTION and the system runs up to 
> almost 4Gb normally.
> 
> The server are dedicated cache (squid) server
> 
> Is this problem and "solution" only a impression or is there any reason or 
> fact some knows?

I'm not aware of the problem, but I don't think IPI_PREEMPTION has been
widely tested yet.

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org