From: Timur Tabi <ttabi@interactivesi.com>
To: linux-mm@kvack.org
Subject: Re: temp. mem mappings
Date: Tue, 5 Jun 2001 15:59:38 -0500 [thread overview]
Message-ID: <bYPDZD.A.c3.-gUH7@dinero.interactivesi.com> (raw)
In-Reply-To: <3B581215@MailAndNews.com>
** Reply to message from cohutta <cohutta@MailAndNews.com> on Tue, 5 Jun 2001
16:42:52 -0400
> I don't really want to play with the page tables if i can help it.
> I didn't use ioremap() because it's real system memory, not IO bus
> memory.
>
> How much normal memory is identity-mapped at boot on x86?
> Is it more than 8 MB?
Much more. Somewhere between 2 and 4 GB is mapped. Large memory support in
Linux has always confused me, so I can't remember exactly how much is mapped.
Keep in mind that if you want to access that memory as uncached or
write-combined, you'll need to use the method I described.
--
Timur Tabi - ttabi@interactivesi.com
Interactive Silicon - http://www.interactivesi.com
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next prev parent reply other threads:[~2001-06-05 20:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-05 20:42 cohutta
2001-06-05 20:59 ` Timur Tabi [this message]
2001-06-05 22:27 ` Joseph A. Knapka
2001-06-06 8:23 ` Stephen C. Tweedie
-- strict thread matches above, loose matches on Subject: below --
2001-06-11 16:32 cohutta
2001-06-25 6:52 ` Eric W. Biederman
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
2001-06-06 21:14 cohutta
2001-06-07 10:00 ` Stephen C. Tweedie
2001-06-05 17:54 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
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