From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: linux-kernel@vger.kernel.org, "Martin J. Bligh" <mbligh@mbligh.org>
Cc: Pavel Machek <pavel@suse.cz>, Daniel Phillips <phillips@arcor.de>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Linux Memory Management <linux-mm@kvack.org>,
Hugh Dickins <hugh@veritas.com>,
Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>,
Andrea Arcangeli <andrea@suse.de>
Subject: Re: [RFC][patch 0/2] mm: remove PageReserved
Date: Thu, 11 Aug 2005 12:36:24 +0200 [thread overview]
Message-ID: <200508111236.25576.rjw@sisk.pl> (raw)
In-Reply-To: <1256640000.1123711001@flay>
Hi,
On Wednesday, 10 of August 2005 23:56, Martin J. Bligh wrote:
> --On Wednesday, August 10, 2005 23:50:22 +0200 Pavel Machek <pavel@suse.cz> wrote:
>
> > Hi!
> >
> >> > Swsusp is the main "is valid ram" user I have in mind here. It
> >> > wants to know whether or not it should save and restore the
> >> > memory of a given `struct page`.
> >>
> >> Why can't it follow the rmap chain?
> >
> > It is walking physical memory, not memory managment chains. I need
> > something like:
>
> Can you not use page_is_ram(pfn) ?
IMHO it would be inefficient.
There obviously are some non-RAM pages that should not be saved and there are
some that are not worthy of saving, although they are RAM (eg because they never
change), but this is very archtecture-dependent. The arch code should mark them
as PageNosave for swsusp, and that's enough.
Greets,
Rafael
--
- Would you tell me, please, which way I ought to go from here?
- That depends a good deal on where you want to get to.
-- Lewis Carroll "Alice's Adventures in Wonderland"
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next prev parent reply other threads:[~2005-08-11 10:32 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-07 3:28 Nick Piggin
2005-08-07 3:29 ` [patch 1/2] mm: remap ZERO_PAGE mappings Nick Piggin
2005-08-07 3:30 ` [patch 2/2] mm: core remove PageReserved Nick Piggin
2005-08-08 21:09 ` [RFC][patch 0/2] mm: " Daniel Phillips
2005-08-08 21:24 ` Daniel Phillips
2005-08-08 21:54 ` Andrew Morton
2005-08-09 23:23 ` [RFC][PATCH] Rename PageChecked as PageMiscFS Daniel Phillips
2005-08-10 7:48 ` Hugh Dickins
2005-08-10 8:06 ` Daniel Phillips
2005-08-10 22:12 ` Daniel Phillips
2005-08-10 22:23 ` Daniel Phillips
2005-08-10 22:34 ` Trond Myklebust
2005-08-10 22:57 ` Daniel Phillips
2005-08-10 23:23 ` Trond Myklebust
2005-08-11 9:42 ` David Howells
2005-08-10 23:42 ` Adrian Bunk
2005-08-11 9:46 ` David Howells
2005-08-12 2:34 ` Daniel Phillips
2005-08-12 12:32 ` David Howells
2005-08-11 9:31 ` David Howells
2005-08-11 9:26 ` David Howells
2005-08-12 3:29 ` Daniel Phillips
2005-08-12 12:41 ` David Howells
2005-08-12 13:28 ` Hugh Dickins
2005-08-16 13:59 ` Pavel Machek
2005-08-18 14:33 ` David Howells
2005-08-18 22:27 ` Pavel Machek
2005-08-19 10:04 ` David Howells
2005-08-19 16:31 ` Daniel Phillips
2005-08-20 10:45 ` David Howells
2005-08-20 20:21 ` Daniel Phillips
2005-08-10 13:13 ` [RFC][patch 0/2] mm: remove PageReserved David Howells
2005-08-10 13:34 ` Daniel Phillips
2005-08-10 14:27 ` David Howells
2005-08-10 23:19 ` Daniel Phillips
2005-08-11 10:49 ` David Howells
2005-08-12 19:34 ` Daniel Phillips
2005-08-15 13:15 ` David Howells
2005-08-16 1:53 ` Daniel Phillips
2005-08-16 10:28 ` David Howells
2005-08-09 0:15 ` Nick Piggin
2005-08-09 8:51 ` Benjamin Herrenschmidt
2005-08-09 9:49 ` Nick Piggin
2005-08-09 19:19 ` Daniel Phillips
2005-08-09 19:22 ` Daniel Phillips
2005-08-10 21:50 ` Pavel Machek
2005-08-10 21:56 ` Martin J. Bligh
2005-08-11 10:36 ` Rafael J. Wysocki [this message]
2005-08-12 19:56 ` Daniel Phillips
2005-08-12 22:20 ` Rafael J. Wysocki
2005-08-12 23:04 ` Daniel Phillips
2005-08-13 7:06 ` Rafael J. Wysocki
2005-08-11 10:26 ` Rafael J. Wysocki
2005-08-09 11:25 ` Hugh Dickins
2005-08-09 14:31 ` Benjamin Herrenschmidt
2005-08-09 14:50 ` Hugh Dickins
2005-08-09 14:49 ` Benjamin Herrenschmidt
2005-08-09 15:36 ` Hugh Dickins
2005-08-09 21:27 ` Daniel Phillips
2005-08-09 19:14 ` Daniel Phillips
2005-08-09 20:17 ` Hugh Dickins
2005-08-09 20:52 ` Daniel Phillips
2005-08-09 4:39 ` Nigel Cunningham
2005-08-09 4:59 ` Nick Piggin
2005-08-09 5:11 ` Nigel Cunningham
2005-08-09 5:20 ` Nick Piggin
2005-08-09 5:30 ` Nigel Cunningham
2005-08-09 7:08 ` Russell King
2005-08-09 8:38 ` Arjan van de Ven
2005-08-09 9:31 ` Nick Piggin
2005-08-09 9:49 ` Arjan van de Ven
2005-08-09 9:57 ` Nick Piggin
2005-08-09 10:24 ` Rafael J. Wysocki
2005-08-09 8:53 ` Benjamin Herrenschmidt
2005-08-09 9:15 ` Hugh Dickins
2005-08-09 10:27 ` Nick Piggin
2005-08-09 11:15 ` Hugh Dickins
2005-08-09 13:15 ` Nick Piggin
2005-08-09 13:26 ` Arjan van de Ven
2005-08-09 14:28 ` Benjamin Herrenschmidt
2005-08-09 14:47 ` Hugh Dickins
2005-08-09 19:49 ` Roman Zippel
2005-08-09 9:29 ` Nick Piggin
2005-08-09 19:40 ` Russell King
2005-08-09 14:38 ` Martin J. Bligh
2005-08-09 19:41 ` Russell King
2005-08-09 20:51 ` Linus Torvalds
2005-08-09 21:16 ` Martin J. Bligh
2005-08-09 21:51 ` Martin J. Bligh
2005-08-10 9:27 ` Benjamin Herrenschmidt
2005-08-11 9:09 ` Nick Piggin
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