From: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
To: David Brownell <david-b@pacbell.net>
Cc: Anton Blanchard <anton@samba.org>,
Jeff Garzik <jgarzik@pobox.com>,
linux-kernel@vger.kernel.org
Subject: Re: pci_set_mwi() ... why isn't it used more?
Date: Thu, 30 Jan 2003 19:59:44 +0300 [thread overview]
Message-ID: <20030130195944.A4966@jurassic.park.msu.ru> (raw)
In-Reply-To: <3E3951E3.7060806@pacbell.net>; from david-b@pacbell.net on Thu, Jan 30, 2003 at 08:25:07AM -0800
On Thu, Jan 30, 2003 at 08:25:07AM -0800, David Brownell wrote:
> At least on 2.5.59, the pci_generic_prep_mwi() code doesn't check
> for that type of error: it just writes the cacheline size, and
> doesn't verify that setting it worked as expected. Checking for
> that kind of problem would make it safer to call pci_set_mwi() in
> such cases ... e.g. using it on a P4 with 128 byte L1 cachelines
> would fail cleanly, while on an Athlon (64 byte L1) it might work
> (depending in which top bits are unusable).
Hmm, what happens if you boot the kernel configured for 80386
on P4 and enable MWI?
Ivan.
next prev parent reply other threads:[~2003-01-30 16:51 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-20 18:41 David Brownell
2003-01-20 19:00 ` Jeff Garzik
2003-01-20 19:37 ` David Brownell
2003-01-30 13:52 ` Anton Blanchard
2003-01-30 16:25 ` David Brownell
2003-01-30 16:59 ` Ivan Kokshaysky [this message]
2003-01-30 18:35 ` David Brownell
2003-01-30 23:34 ` Ivan Kokshaysky
2003-01-31 0:11 ` Jeff Garzik
2003-01-31 0:51 ` David Brownell
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