From: Don Dutile <ddutile@redhat.com>
To: Bryce Lelbach <blelbach@cct.lsu.edu>
Cc: linux-pci@vger.kernel.org
Subject: Re: Patch: Increase maximum bus memory window size (for Xeon Phi)
Date: Mon, 03 Jun 2013 14:58:51 -0400 [thread overview]
Message-ID: <51ACE76B.1000307@redhat.com> (raw)
In-Reply-To: <20130524165947.GA2487@pyxis.br.cox.net>
On 05/24/2013 12:59 PM, Bryce Lelbach wrote:
> The attached patch affects pbus_size_mem() in drivers/pci/setup-bus.c. The patch
> increases the maximum memory window size for a PCI bus from 2 Gb to 2^63 Gb.
>
> This change is necessary to support Intel Xeon Phi co-processors. These co-processors
> are PCIe devices used for high-performance computing applications. The device requires
> an 8Gb memory window to function (the co-processor has 8Gb of onboard memory).
>
> This patch is a modified version of a patch from Intel's MPSS framework
> (specifically, from the "KNC_gold_update_1-2.1.4982-15-rhel-6.3" package), which
> will apply to a 3.7.8 kernel (I am about to try it on a 3.8 kernel). To the best
> of my knowledge, newer RHEL kernels are shipped with this patch.
>
This patch is not in (the latest) RHEL6(.4) or the internal staging tree for the next
RHEL6(.5) release.
next prev parent reply other threads:[~2013-06-03 18:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-24 16:59 Patch: Increase maximum bus memory window size (for Xeon Phi) Bryce Lelbach
2013-06-03 18:58 ` Don Dutile [this message]
2013-10-04 7:19 ` Bryce Lelbach
2013-07-25 21:10 ` Bjorn Helgaas
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