SMP and IP_PREEMPTION

[JoaoBR]

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?

thank's
João







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