From: Matthias Schniedermeyer <ms@citd.de>
To: Charles Buysschaert <Charles.Buysschaert@intopix.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Speed of RAM reserved with memmap kernel command line option.
Date: Mon, 17 Oct 2011 15:23:18 +0200 [thread overview]
Message-ID: <20111017132318.GA9098@citd.de> (raw)
In-Reply-To: <894F5F1132E3C5458AAB08FA0A1AC9380F1E2F12@IPX-MAIL.Intopix.com>
On 17.10.2011 07:51, Charles Buysschaert wrote:
> Hello all,
>
> We are writing a PCI-e "frame grabber-like" driver for linux 2.6 kernel.
...
> I guess cache is not used. Does anyone know if there is a way to speed this up? How could we set that area to "cached"?
Smells to me like you are missing a mapping in MTRR ...
Documentation/x86/mtrr.txt
... or PAT.
Documentation/x86/pat.txt
Bis denn
--
Real Programmers consider "what you see is what you get" to be just as
bad a concept in Text Editors as it is in women. No, the Real Programmer
wants a "you asked for it, you got it" text editor -- complicated,
cryptic, powerful, unforgiving, dangerous.
next prev parent reply other threads:[~2011-10-17 13:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-17 7:51 Speed of RAM reserved with memmap kernel command line option Charles Buysschaert
2011-10-17 13:23 ` Matthias Schniedermeyer [this message]
2011-10-28 9:30 ` Charles Buysschaert
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