HEADS UP [Re: thread+preemption stability improvement]

[Daniel Eriksson]

Scott Long wrote:

> All,
> 
> Initial testing of this patch looks very promising.  For those that
> aren't comfortable with patching their sources by hand, note that it
> was committed to CVS a few hours ago and should be showing up on CVSup
> very shortly (rev 1.8 of sys/i386/i386/intr_machdep.c is what you want
> if you are running i386).  Please go out and test this as much as 
> possible so that we can determine if futher action is needed.

I must unfortunately report that this does not cure my problem with SATA
instability when preemption is turned on.

I have set aside some time on the server (normally a busy production-type
server) to try a few different configs (SHED_ULE instead of SHED_4BSD,
turning off apic, removing polling) to see if any of them will have any
impact.

/Daniel Eriksson