From: Kanoj Sarcar <kanoj@google.engr.sgi.com>
To: "Stephen C. Tweedie" <sct@redhat.com>
Cc: Roman Zippel <roman@augan.com>,
linux-mm@kvack.org, linux-kernel@vger.rutgers.edu,
rmk@arm.linux.org.uk, nico@cam.org, davem@redhat.com,
davidm@hpl.hp.com, alan@lxorguk.ukuu.org.uk
Subject: Re: pte_pagenr/MAP_NR deleted in pre6
Date: Wed, 16 Aug 2000 15:22:07 -0700 (PDT) [thread overview]
Message-ID: <200008162222.PAA95137@google.engr.sgi.com> (raw)
In-Reply-To: <20000816192012.K19260@redhat.com> from "Stephen C. Tweedie" at Aug 16, 2000 07:20:12 PM
>
> Hi,
>
> On Wed, Aug 16, 2000 at 10:13:21AM -0700, Kanoj Sarcar wrote:
> >
> > FWIW, Linus was mildly suggesting I implement page_to_phys, to complement
> > virt_to_page.
>
> It's part of what is necessary if we want to push kiobufs into the
> driver layers. page_to_pfn is needed to for PAE36 support so that
> PCI64 or dual-address-cycle drivers can handle physical addresses
> longer than 32 bits long.
>
While we are on this topic, something like
#define page_to_phys(page) \
((((page)-(page)->zone->zone_mem_map) << PAGE_SHIFT) \
+ ((page)->zone->zone_start_paddr))
should work on all platforms on 2.4. (You might have to add in an
unsigned long long somewhere in there for PAE36).
Kanoj
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next prev parent reply other threads:[~2000-08-16 22:22 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-08-10 17:18 pte_pagenr/MAP_NR deleted in pre6 Kanoj Sarcar
2000-08-11 2:24 ` David S. Miller
2000-08-14 0:34 ` Anton Blanchard
2000-08-11 11:50 ` Roman Zippel
2000-08-11 13:20 ` Russell King
2000-08-11 14:56 ` Roman Zippel
2000-08-12 9:18 ` Bjorn Wesen
2000-08-11 17:21 ` Kanoj Sarcar
2000-08-14 9:29 ` Roman Zippel
2000-08-15 16:19 ` Stephen C. Tweedie
2000-08-16 8:25 ` Roman Zippel
2000-08-16 17:13 ` Kanoj Sarcar
2000-08-16 18:20 ` Stephen C. Tweedie
2000-08-16 18:24 ` David S. Miller
2000-08-16 19:53 ` Stephen C. Tweedie
2000-08-16 18:47 ` Kanoj Sarcar
2000-08-16 18:39 ` David S. Miller
2000-08-16 19:30 ` Stephen C. Tweedie
2000-08-16 22:22 ` Kanoj Sarcar [this message]
2000-08-17 9:11 ` Stephen C. Tweedie
2000-08-17 19:07 ` Kanoj Sarcar
2000-08-17 19:01 ` David S. Miller
2000-08-17 19:19 ` Alan Cox
2000-08-17 19:20 ` David S. Miller
2000-08-17 19:33 ` Alan Cox
2000-08-17 19:36 ` Kanoj Sarcar
2000-09-07 14:31 ` Ralf Baechle
2000-08-17 19:50 ` Kanoj Sarcar
2000-08-17 19:41 ` David S. Miller
2000-09-07 14:26 ` Ralf Baechle
2000-08-17 19:56 ` Alan Cox
2000-08-17 19:24 ` Alan Cox
2000-08-17 19:32 ` Kanoj Sarcar
2000-08-17 19:30 ` David S. Miller
2000-08-17 20:00 ` Kanoj Sarcar
2000-08-16 18:17 ` Stephen C. Tweedie
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