From: Pavel Machek <pavel@ucw.cz>
To: Patrick Mochel <mochel@digitalimplant.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Nigel Cunningham <ncunningham@users.sourceforge.net>,
Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: swsusp vs pgdir
Date: Fri, 23 Jan 2004 17:53:04 +0100 [thread overview]
Message-ID: <20040123165304.GA257@elf.ucw.cz> (raw)
In-Reply-To: <Pine.LNX.4.50.0401230839420.11276-100000@monsoon.he.net>
Hi!
> > Wait... wait... If the whole linear mapping isn't mapped by this flat
> > pgdir, then we have a problem, since the MMU will have to go down the
> > kernel pagetables to actually access the pages data when copying them
> > around... but at this point, we are overriding the boot kernel page
> > tables with the loader ones, so ...
>
> A new pgdir is allocated on resume that does not overlap with any pages
> being restored. See relocate_pagedir() in the code..
Look again. relocate_pagedir() does not work with hardware page
directories. Instead, it deals with swsusp data structure telling it
what to copy where.
Okay, it could use some better name...
Pavel
--
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]
next prev parent reply other threads:[~2004-01-23 16:53 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-23 4:58 swsusp vs pgdir Benjamin Herrenschmidt
2004-01-23 7:34 ` Pavel Machek
2004-01-23 7:43 ` Benjamin Herrenschmidt
2004-01-23 7:54 ` Pavel Machek
2004-01-23 8:21 ` Benjamin Herrenschmidt
2004-01-23 16:03 ` Patrick Mochel
2004-01-23 16:10 ` Benjamin Herrenschmidt
2004-01-23 16:45 ` Patrick Mochel
2004-01-23 16:53 ` Pavel Machek [this message]
2004-01-23 17:04 ` Pavel Machek
2004-01-24 1:03 ` Benjamin Herrenschmidt
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