Date: Wed, 22 Oct 2003 15:33:59 -0700 (PDT) From: Doug White <dwhite@gumbysoft.com> To: Eugene Grosbein <eugen@kuzbass.ru> Cc: sos@FreeBSD.org Subject: Re: kern/57174: 4.9-PRERELEASE panic: ata_dmasetup: Message-ID: <20031022153313.U71676@carver.gumbysoft.com> In-Reply-To: <3F95E895.9E936CEC@kuzbass.ru> References: <200310210745.h9L7j9ed013183@atlantis.dp.ua> <3F95E895.9E936CEC@kuzbass.ru>
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On Wed, 22 Oct 2003, Eugene Grosbein wrote: > dmitry@atlantis.dp.ua wrote: > > > > Hello! > > > > I'm curious whether this issue would be critical for ANY ata(4)-system. > > So (to the PR originator): Eugene, could you try your experiment with > > tagged queueing turned off (hw.ata.tags=0)? > > I've tried. It does not panic with hw.ata.tags=0, > glimpseindex took more than a hour to complete. > This time CPU utilization was about 50% only > and 'systat -vm 3' have shown 100% of hard drive usage. > > So Tagged Queueing may be guilty (again). Why do you have ATA tagging turned on in the first place? It's known to not work with 99% of the hardware out there; only a couple of models of IBM drives having working tagging. This is not turned on by default on purpose.... -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org
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