Lost interrupts on SMP systems

[Peter Trifonov]

Hello John,

> > > workaround for an undocumented errata in at least some older I/O 
> > > APICs where a level triggered interrupt can accidentally be 
> > > delivered as edge triggered and end up not being properly 
> > > acknowledged.  However, you don't have any level triggered 
> > > interrupts, so I'm not sure that is applicable.
> More interrupt load that way, which would indicate maybe the 
> bug Linux tries to work around except that your intpins are 
> edge triggered. :(

After doing some google search I have found a number of somewhat similar
problem reports/patches related to this family of HP boxes (Vectra XU
6/200).
Maybe that is what you were writing about, sorry in such case.

http://www.sslug.dk/emailarkiv/teknik/2000_07/msg00306.html 
http://www.mail-archive.com/linux-kernel@vger.kernel.org/msg34195.html




freebsd-smp-unsubscribe at freebsd.org"
With best regards,
P. Trifonov