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Date: Wed, 17 Mar 2004 20:00:39 -0800 (PST)
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From: Eugene Grosbein <eugen@kuzbass.ru>
Subject: Re: kern/60526: Post-PAE stable SMP machine freezes
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The following reply was made to PR kern/60526; it has been noted by GNATS.

From: Eugene Grosbein <eugen@kuzbass.ru>
To: bug-followup@freebsd.org
Cc: sos@freebsd.org, stable@freebsd.org
Subject: Re: kern/60526: Post-PAE stable SMP machine freezes
Date: Thu, 18 Mar 2004 11:00:09 +0700

 Hi!
 
 According to
 http://freebsd.rambler.ru/bsdmail/freebsd-hackers_2003/msg03936.html
 the problem may be related to the <ServerWorks ROSB4 ATA33 controller>
 and ATA write cache (hw.ata.wc=1).
 
 Note however, I had no kernel panic with post-PAE STABLE.
 I had kernel lockup. I can understand kernel panic due to the faulty
 devices but not endless loop that it seems to happen.
 
 It's known (and noted in the Errata for 4.9-RELEASE)
 that PAE integration broke hw.ata.tags. Perhaps, its time
 either to document that hw.ata.wc is broken for noted controller too,
 either to forbid write cache for it by force.
 
 I run my machine using pre-PAE 4.8-STABLE with security patches still.
 
 Eugene Grosbein