From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Jeremy Maitin-Shepard <jbms@cmu.edu>
Cc: Al Boldi <a1426z@gawab.com>,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: Hibernation Redesign
Date: Mon, 09 Jul 2007 14:58:50 +1000 [thread overview]
Message-ID: <4691C08A.90707@yahoo.com.au> (raw)
In-Reply-To: <87fy3yw50p.fsf@jbms.ath.cx>
Jeremy Maitin-Shepard wrote:
> Nick Piggin <nickpiggin@yahoo.com.au> writes:
>>Yes, I have a rough idea about how page reclaim works. But I just
>>mean it would not be trivial to load the new kernel into physically
>>discontiguous memory. Possible of course, but I don't think kexec or
>>the setup code could quite cope ATM.
>
>
> It would indeed be a pain for the new kernel to be loaded and have to
> use discontiguous memory. The trick is, though, that this is not
> necessary. Immediately before jumping to the new kernel, the first X
> bytes (where X is the amount of memory the new kernel will get,
> typically 16MB or 64MB) of physical memory are backed up into the
> arbitrary discontiguous pages that are made available. This will not
> take very long, because copying even 64MB of memory is extremely fast.
> Then the new kernel is free to use the first X bytes of contiguous
> physical memory. Problem solved.
Ah, that sounds like it would be the right way to go. Good thinking.
--
SUSE Labs, Novell Inc.
next prev parent reply other threads:[~2007-07-09 4:59 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-08 14:37 Hibernation Redesign (was: malicious filesystems (was Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM) Al Boldi
2007-07-09 4:11 ` Hibernation Redesign Jeremy Maitin-Shepard
2007-07-09 4:29 ` Nick Piggin
2007-07-09 4:36 ` Jeremy Maitin-Shepard
2007-07-09 4:45 ` Nick Piggin
2007-07-09 4:54 ` Jeremy Maitin-Shepard
2007-07-09 4:58 ` Nick Piggin [this message]
2007-07-09 5:33 ` Nick Piggin
2007-07-09 6:22 ` Jeremy Fitzhardinge
2007-07-09 13:45 ` Pavel Machek
2007-07-09 14:02 ` Oliver Neukum
2007-07-09 14:26 ` Jeremy Maitin-Shepard
2007-07-09 15:09 ` Oliver Neukum
2007-07-09 15:27 ` Jeremy Maitin-Shepard
2007-07-09 4:39 ` Nick Piggin
2007-07-09 13:52 ` Pavel Machek
2007-07-09 15:30 ` Al Boldi
2007-07-10 1:29 ` Nick Piggin
2007-07-10 2:28 ` Jeremy Maitin-Shepard
2007-07-10 14:57 ` Jeremy Fitzhardinge
2007-07-10 17:25 ` Jeremy Maitin-Shepard
2007-07-10 22:59 ` Jeremy Fitzhardinge
2007-07-11 4:11 ` Al Boldi
2007-07-11 10:27 ` Rafael J. Wysocki
2007-07-11 10:42 ` Miklos Szeredi
2007-07-11 11:04 ` Rafael J. Wysocki
2007-07-11 11:11 ` Miklos Szeredi
2007-07-11 11:50 ` Rafael J. Wysocki
2007-07-11 11:54 ` Miklos Szeredi
2007-07-11 12:00 ` Nigel Cunningham
2007-07-11 12:09 ` Miklos Szeredi
2007-07-11 12:17 ` Nigel Cunningham
2007-07-11 12:27 ` Rafael J. Wysocki
2007-07-11 12:29 ` Miklos Szeredi
2007-07-11 21:04 ` Rafael J. Wysocki
2007-07-12 9:15 ` Pavel Machek
2007-07-12 22:13 ` Miklos Szeredi
2007-07-11 12:19 ` Rafael J. Wysocki
2007-07-11 12:49 ` Nigel Cunningham
2007-07-11 21:06 ` Rafael J. Wysocki
2007-07-11 12:11 ` Nigel Cunningham
2007-07-11 12:24 ` Miklos Szeredi
2007-07-11 12:46 ` Nigel Cunningham
2007-07-11 12:55 ` Miklos Szeredi
2007-07-11 13:16 ` Jeremy Maitin-Shepard
2007-07-11 20:48 ` Mark Lord
2007-07-11 21:14 ` Rafael J. Wysocki
2007-07-11 22:17 ` Al Boldi
2007-07-11 22:34 ` Rafael J. Wysocki
2007-07-11 23:12 ` Al Boldi
2007-07-11 23:31 ` Nigel Cunningham
2007-07-12 3:11 ` Al Boldi
2007-07-12 13:20 ` Rafael J. Wysocki
2007-07-16 6:04 ` Nick Piggin
2007-07-12 20:29 ` Jeremy Maitin-Shepard
2007-07-11 23:46 ` Nigel Cunningham
2007-07-11 17:55 ` david
2007-07-11 22:54 ` Nigel Cunningham
2007-07-10 17:45 ` Al Boldi
2007-07-10 18:20 ` Jeremy Maitin-Shepard
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