From: Arjan van de Ven <arjan@infradead.org>
To: Brice Goglin <brice@myri.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
netdev@vger.kernel.org,
"venkatesh.pallipadi@intel.com" <venkatesh.pallipadi@intel.com>
Subject: Re: howto use ioremap_wc?
Date: Mon, 2 Jun 2008 19:18:32 -0700 [thread overview]
Message-ID: <20080602191832.0858eff9@infradead.org> (raw)
In-Reply-To: <48441F73.5040005@myri.com>
On Mon, 02 Jun 2008 18:27:31 +0200
Brice Goglin <brice@myri.com> wrote:
>
> Agreed, that would be nice!
>
> >From what we discussed here after your reply, our plan is now to just
> replace
> ioremap+mtrr_add
which doesn't work as ioremap() may/will force uncached ;)
> with
> ioremap_wc+mtrr_add
>
> If mtrr_add() is moved into ioremap_wc(), we'll remove it from
> myri10ge. For now, when PAT is enabled, we may have PAT + MTRR both
> doing WC, but I don't think it can break anything, right?
Both having WC is nicely consistent and the right thing happens...
--
If you want to reach me at my work email, use arjan@linux.intel.com
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
next prev parent reply other threads:[~2008-06-03 2:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-31 9:02 howto use ioremap_wc? Brice Goglin
2008-06-01 1:54 ` Arjan van de Ven
2008-06-02 16:27 ` Brice Goglin
2008-06-02 18:18 ` Loic Prylli
2008-06-03 2:18 ` Arjan van de Ven [this message]
2008-06-05 4:53 ` Roland Dreier
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