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Date: Wed, 1 Dec 2004 15:22:41 -0600
From: "Jose R. Santos" <jrsantos@austin.ibm.com>
To: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Matthew Wilcox <matthew@wil.cx>,
       "Jose R. Santos" <jrsantos@austin.ibm.com>,
       SCSI Mailing List <linux-scsi@vger.kernel.org>,
       Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: phase change messages cusing slowdown with sym53c8xx_2 driver
Message-ID: <20041201212241.GA1528@rx8.austin.ibm.com>
References: <20041130030212.GB22916@austin.ibm.com> <20041201165654.GA32687@rx8.austin.ibm.com> <1101921398.1930.24.camel@mulgrave> <20041201203226.GI5752@parcelfarce.linux.theplanet.co.uk> <1101933788.1930.226.camel@mulgrave>
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James Bottomley <James.Bottomley@SteelEye.com> [041201]:
> Actually, yes, or the attached variant of it.  Does this solve the
> problem?
> 
> There's no reason why we should assume a SCSI_3 or greater device
> automatically supports ppr (especially if it's inquiry bit is
> advertising that it doesn't...)
> 
> James

That fixes the problem.  No more messages "phase change" messages are
showing up and the disk performance is as expected.

Thanks

-JRS