From: Pavel Machek <pavel@ucw.cz>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Nigel Cunningham <ncunningham@users.sourceforge.net>,
Patrick Mochel <mochel@osdl.org>,
Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: swsusp vs pgdir
Date: Fri, 23 Jan 2004 08:54:51 +0100 [thread overview]
Message-ID: <20040123075451.GB211@elf.ucw.cz> (raw)
In-Reply-To: <1074843781.878.1.camel@gaston>
Hi!
> > We test that CPU has PSE feature. That means kernel is mapped using
> > 4MB page tables, and I do not have to care about page tables at
> > all.
>
> Just enlighten me please: How do these 4Mb page tables work ? The pgdir
> entries contain special bits ? Then you at least must make sure the
The pgdir contains special bits, and there are no other levels of page
tables.
Now, I'm apparently rewriting swapper_pg_dir with itself (same
data). That's not too clean, but CPUs do not notice it...
> swapper_pgdir is left intact. This is the case ? (I also suppose you
> mean the entire linear mapping, not just the kernel, is mapped with
> 4M pages)
Yes.
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 7:55 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 [this message]
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
2004-01-23 17:04 ` Pavel Machek
2004-01-24 1:03 ` Benjamin Herrenschmidt
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