From: William Lee Irwin III <wli@holomorphy.com>
To: Michel Hubert <mhubert@matrox.com>
Cc: linux-mm@kvack.org
Subject: Re: [Fwd: remap_page_range() vs nopage()]
Date: Wed, 14 Jul 2004 15:56:38 -0700 [thread overview]
Message-ID: <20040714225638.GZ3411@holomorphy.com> (raw)
In-Reply-To: <1089844986.15840.144.camel@blackcomb>
On Wed, Jul 14, 2004 at 06:43:06PM -0400, Michel Hubert wrote:
> I previously posted this question to kernelnewbies.org but without
> getting any answer. I hope it is not too basic for this mailing list...
> It's written in Linux Device Driver 2nd edition that remap_page_range
> (which maps an entire range at once) should be used for device IO
> whereas nopage (which maps a single page at a time) should be used for
> real physical memory.
> However, I noticed that mmap_mem() in drivers/char/mem.c uses
> exclusively remap_page_range. How could this work when dealing with non
> contiguous physical memory ?
I gave up on fixing this and the highmem issue with mem.c a while ago.
There's holy penguin pee here, beware.
-- wli
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prev parent reply other threads:[~2004-07-14 22:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-14 22:43 Michel Hubert
2004-07-14 22:56 ` William Lee Irwin III [this message]
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