From: "David S. Miller" <davem@davemloft.net>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: grundler@parisc-linux.org, linux-pci@atrey.karlin.mff.cuni.cz,
linux-kernel@vger.kernel.org, greg@kroah.com,
bjorn.helgaas@hp.com, davem@redhat.com
Subject: Re: pci-sysfs resource mmap broken (and PATCH)
Date: Thu, 28 Apr 2005 00:22:09 -0700 [thread overview]
Message-ID: <20050428002209.12bd3f37.davem@davemloft.net> (raw)
In-Reply-To: <1114672880.7111.254.camel@gaston>
On Thu, 28 Apr 2005 17:21:19 +1000
Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
> I have a real net big performance improvement on X by doing that
> trick ... the sysfs mmap API doesn't really provide a mean to do
> it explicitely from userland (unlike the ioctl with the old proc api)
You can refine your test to "if PCI class is display or VGA" and the
prefetchability is set in the BAR, then elide the guard PTE
protection bit.
next prev parent reply other threads:[~2005-04-28 7:31 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-26 5:33 pci-sysfs resource mmap broken Benjamin Herrenschmidt
2005-04-26 6:09 ` Benjamin Herrenschmidt
2005-04-26 6:36 ` Greg KH
2005-04-26 9:24 ` Russell King
2005-04-26 16:30 ` Grant Grundler
2005-04-26 22:47 ` Benjamin Herrenschmidt
2005-04-27 3:55 ` Grant Grundler
2005-04-27 4:30 ` Benjamin Herrenschmidt
2005-04-27 4:28 ` David S. Miller
2005-04-27 4:39 ` Benjamin Herrenschmidt
2005-04-27 4:46 ` pci-sysfs resource mmap broken (and PATCH) Benjamin Herrenschmidt
2005-04-27 23:13 ` Benjamin Herrenschmidt
2005-04-28 5:33 ` Grant Grundler
2005-04-28 5:37 ` David S. Miller
2005-04-28 6:39 ` Benjamin Herrenschmidt
2005-04-28 6:50 ` David S. Miller
2005-04-28 7:21 ` Benjamin Herrenschmidt
2005-04-28 7:22 ` David S. Miller [this message]
2005-04-28 7:46 ` Benjamin Herrenschmidt
2005-04-28 15:11 ` Grant Grundler
2005-04-28 22:47 ` Benjamin Herrenschmidt
2005-04-28 23:38 ` Grant Grundler
2005-04-29 15:42 ` David S. Miller
2005-04-29 22:16 ` Jesse Barnes
2005-04-28 6:35 ` Benjamin Herrenschmidt
2005-05-03 5:37 ` pci-sysfs resource mmap broken PATCH#2 Benjamin Herrenschmidt
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