Re: Problems with SMP

Thomas Lenherr wrote:
> Hi,
> I'm using an Asus PC-DL and everything works fine, except I'm 
> experiencing troubles when copying files via a network fs (nfs and smb). 
> Because of that I wrote to the linux-fsdevel-list and to the lkml.
> A exact description of the symptons may be read here:
> http://bugme.osdl.org/show_bug.cgi?id=3608
> 
> My system had 2 P4 with HT activated, but a few days ago I deactivated 
> HT and instantly I experienced much less troubles (~2/9 files corrupted 
> via nfs instead of ~7/9). After this I compiled a kernel without 
> smp-support and the problem was gone. Got no more any corrupted files!
> It's a bit weird that I got only troubles with network filesystems, but 
> that's the way it is ...
> Please read the description given in the bug-report link given above for 
> further informations, but, as I said, when I posted this bug I hadn't 
> realized yet it got something to do with smp...
> 
> I'd be very pleased if somebody could help me so that I could reactivate 
> my second processor :)

You probably don't want to go thru the corruption again,
but can you tell us if this happens with CONFIG_PREEMPT=y or n?
There have been a few problems recently with PREEMPT not being
used safely.  If it happens with PREEMPT=y, can you test it
with PREEMPT=n please.

-- 
~Randy