Date: Wed, 12 Apr 2006 16:05:52 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: brueffer@freebsd.org Cc: cvs-src@freebsd.org, src-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/dev/pccbb pccbb.c Message-ID: <20060412.160552.35796990.imp@bsdimp.com> In-Reply-To: <20060412212843.GH1258@haakonia.hitnet.RWTH-Aachen.DE> References: <200603300425.k2U4PjJH099559@repoman.freebsd.org> <20060412212843.GH1258@haakonia.hitnet.RWTH-Aachen.DE>
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In message: <20060412212843.GH1258@haakonia.hitnet.RWTH-Aachen.DE>
Christian Brueffer <brueffer@FreeBSD.org> writes:
: On Thu, Mar 30, 2006 at 04:25:45AM +0000, Warner Losh wrote:
: > imp 2006-03-30 04:25:45 UTC
: >
: > FreeBSD src repository
: >
: > Modified files:
: > sys/dev/pccbb pccbb.c
: > Log:
: > On some laptops, under very high loads, the socket event register read
: > in the ISR doesn't read the actual socket event register, but instead
: > reads garbage (usually 0xffffffff, but other times other things).
: > This totally violates the PCI spec, but happens rarely enough that a
: > workaround is in order. This adds one test when we have a real
: > interrupt to service (which is very rare), and doesn't affect the
: > usualy 'nothing to see here' case at all.
: >
: > Problem reported by many, but sam@ gave me this workaround after
: > diagnosing the problem.
: >
:
: This breaks pccard/cardbus support on my Thinkpad T41p (confirmed by
: backing this change out). With this change, I just get an "Interrupt
: storm detected on irq 5; throttling" message.
:
: What kind of debug info can I provide?
A Thinkpad T41p. :-)
Failing that, can you set hw.cbb.debug=1 and provide me with the
output.
Warner
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