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From: "Peter Trifonov" <pvtrifonov@mail.ru>
To: "'John Baldwin'" <jhb@FreeBSD.org>, <freebsd-smp@FreeBSD.org>
Date: Sat, 15 Jan 2005 13:15:59 +0300
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cc: kris@obsecurity.org
Subject: RE: Lost interrupts on SMP systems
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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
 
 

With best regards,
P. Trifonov