From: Christoph Hellwig <hch@infradead.org>
To: Christian Leber <christian@leber.de>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Problem with remap_page_range/mmap
Date: Fri, 26 Mar 2004 09:46:56 +0000 [thread overview]
Message-ID: <20040326094656.A3812@infradead.org> (raw)
In-Reply-To: <20040326093619.GA15965@core.home>; from christian@leber.de on Fri, Mar 26, 2004 at 10:36:19AM +0100
On Fri, Mar 26, 2004 at 10:36:19AM +0100, Christian Leber wrote:
> 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.
Put the page structs into an array and return them from ->nopage. The
kernel pagefault code will set up the ptes for you.
Now actually getting 4MB of continguous memory is a different issue..
I'm surprised you actually managed to get the allocation to succeed.
next prev parent reply other threads:[~2004-03-26 9:46 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
2004-03-26 9:46 ` Christoph Hellwig [this message]
2004-03-26 9:58 ` Hugang
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