From: Bjorn Helgaas <bjorn.helgaas@hp.com>
To: Jesse Barnes <jbarnes@sgi.com>, "Moore, Eric Dean" <Emoore@lsil.com>
Cc: Alex Williamson <alex.williamson@hp.com>,
jeremy@sgi.com, linux-scsi@vger.kernel.org,
linux-ia64@vger.kernel.org
Subject: Re: mpt sets 64bit consistent mask yet requires mapping in same 4 GB chunk?!?
Date: Fri, 13 Feb 2004 22:52:43 +0000 [thread overview]
Message-ID: <200402131552.43935.bjorn.helgaas@hp.com> (raw)
In-Reply-To: <20040213213043.GB20323@sgi.com>
On Friday 13 February 2004 2:30 pm, Jesse Barnes wrote:
> On Fri, Feb 13, 2004 at 04:20:35PM -0500, Moore, Eric Dean wrote:
> > I added pci_set_consistent_dma_mask() per request from
> > Jeremy Higdon<jeremy@sgi.com> back on 12/03/03. He
> > was having problems on a Altix (IA64) system. See
> > attached email. What is your recommendation? I have a mpt
> > patch in the queue which doesn't address this.
> >
> > On Friday, February 13, 2004 9:12 AM, Alex Williamson wrote:
> > > These are two perfectly valid consistent mappings as far as the
> > > platform code is concerned. I think mpt really needs to either set
> > > a 32bit consistent map of do a single allocation when it requires
> > > this type of thing. Thanks,
>
> I think Alex's second suggestion would be the best--do a single
> allocation rather than falling back to a 32 bit consistent mask.
But even with a single allocation, there's nothing to prevent it
from crossing a 4GB boundary, is there?
next prev parent reply other threads:[~2004-02-13 22:52 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-13 16:12 mpt sets 64bit consistent mask yet requires mapping in same 4GB Alex Williamson
2004-02-13 21:20 ` mpt sets 64bit consistent mask yet requires mapping in same 4 Moore, Eric Dean
2004-02-13 21:30 ` mpt sets 64bit consistent mask yet requires mapping in same 4 GB chunk?!? Jesse Barnes
2004-02-13 22:52 ` Bjorn Helgaas [this message]
2004-02-13 23:08 ` Jeremy Higdon
2004-02-13 23:13 ` Matthew Wilcox
2004-02-13 23:39 ` Jeremy Higdon
2004-02-13 23:23 ` mpt sets 64bit consistent mask yet requires mapping in same 4 Moore, Eric Dean
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