From: "Stephen C. Tweedie" <sct@redhat.com>
To: Timur Tabi <ttabi@interactivesi.com>
Cc: linux-mm@kvack.org
Subject: Re: temp. mem mappings
Date: Tue, 5 Jun 2001 19:59:38 +0100 [thread overview]
Message-ID: <20010605195938.L26756@redhat.com> (raw)
In-Reply-To: <93UtRC.A.gWG.8oSH7@dinero.interactivesi.com>; from ttabi@interactivesi.com on Tue, Jun 05, 2001 at 01:51:37PM -0500
Hi,
On Tue, Jun 05, 2001 at 01:51:37PM -0500, Timur Tabi wrote:
> > > Allocate a virtual memory area using vmalloc and then save and modify the
> > > pmd/pgd/pte to point to the physical memory you want. To unmap, just undo the
> > > previous steps.
> >
> > ioremap() is there for exactly that purpose.
>
> True, except that you can't use ioremap on normal memory, which is what I
> assumed he was trying to do.
Normal memory is identity-mapped very early in boot anyway (except for
highmem on large Intel boxes, that is, and kmap() works for that.)
--Stephen
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next prev parent reply other threads:[~2001-06-05 18:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-05 17:54 temp. mem mappings cohutta
2001-06-05 18:25 ` Timur Tabi
2001-06-05 18:41 ` Stephen C. Tweedie
2001-06-05 18:51 ` Timur Tabi
2001-06-05 18:59 ` Stephen C. Tweedie [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-06-05 20:42 cohutta
2001-06-05 20:59 ` Timur Tabi
2001-06-05 22:27 ` Joseph A. Knapka
2001-06-06 8:23 ` Stephen C. Tweedie
2001-06-06 21:14 cohutta
2001-06-07 10:00 ` Stephen C. Tweedie
2001-06-08 1:38 cohutta
2001-06-08 17:02 ` Joseph A. Knapka
2001-06-08 18:07 ` Stephen C. Tweedie
2001-06-08 21:22 ` Joseph A. Knapka
2001-06-11 16:32 cohutta
2001-06-25 6:52 ` Eric W. Biederman
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