From: Christian Leber <christian@leber.de>
To: Christoph Hellwig <hch@infradead.org>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Problem with remap_page_range/mmap
Date: Fri, 26 Mar 2004 10:36:19 +0100 [thread overview]
Message-ID: <20040326093619.GA15965@core.home> (raw)
In-Reply-To: <20040326071739.B2637@infradead.org>
On Fri, Mar 26, 2004 at 07:17:39AM +0000, Christoph Hellwig wrote:
> You can't call remap_page_range on normal kernel pages. It works only
> if you mark them PG_reserved, but even that use is usually not a good idea.
It also didn´t work with PG_reserved.
What would be the good idea? I need at least 8 at least 4MB (2MB are enough for 2.4)
big physical memory pieces for DMA, mapped to userspace.
What is the reason why it doesn´t work? There seems to be no special
remap_page_range for ia64.
Christian Leber
--
"Omnis enim res, quae dando non deficit, dum habetur et non datur,
nondum habetur, quomodo habenda est." (Aurelius Augustinus)
Translation: <http://gnuhh.org/work/fsf-europe/augustinus.html>
next prev parent reply other threads:[~2004-03-26 9:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-25 23:48 Problem with remap_page_range/mmap Christian Leber
2004-03-26 7:17 ` Christoph Hellwig
2004-03-26 9:36 ` Christian Leber [this message]
2004-03-26 9:46 ` Christoph Hellwig
2004-03-26 9:58 ` Hugang
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