From: Jeremy Fitzhardinge <jeremy@goop.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <andi@firstfloor.org>, Hugh Dickins <hugh@veritas.com>,
Christoph Lameter <clameter@sgi.com>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Bart Van Assche <bart.vanassche@gmail.com>
Subject: Re: quicklists confuse meminfo
Date: Mon, 10 Mar 2008 14:26:16 -0700 [thread overview]
Message-ID: <47D5A778.3020500@goop.org> (raw)
In-Reply-To: <47D5A000.6000407@zytor.com>
H. Peter Anvin wrote:
> Jeremy Fitzhardinge wrote:
>>
>> Yeah, the most fundamental problem is that the whole page is RO, so
>> even if Xen trapped and emulated, it still makes a very bad
>> neighbour. I was also going to say that there's no reason why you
>> couldn't pack multiple pgds into one page, but I think we can only
>> specify the cr3 at page resolution anyway.
>>
>
> Wrong. With PAE you can specify it at any 32-byte boundary.
Yes, the x86 lets you, but Xen doesn't - mostly because it reuses the
lower 12 bits as upper bits of the pfn so that you can specify a
pagetable base at >4G.
J
next prev parent reply other threads:[~2008-03-10 21:27 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-09 10:19 quicklists confuse meminfo Thomas Gleixner
2008-03-09 10:26 ` Bart Van Assche
2008-03-09 10:29 ` Andi Kleen
2008-03-09 10:42 ` KOSAKI Motohiro
2008-03-09 12:00 ` Thomas Gleixner
2008-03-09 11:14 ` Ingo Molnar
2008-03-09 11:56 ` Thomas Gleixner
2008-03-09 12:01 ` Ingo Molnar
2008-03-09 12:49 ` Andi Kleen
2008-03-10 15:51 ` Christoph Lameter
2008-03-09 12:03 ` Johannes Weiner
2008-03-09 12:03 ` KOSAKI Motohiro
2008-03-09 12:09 ` Ingo Molnar
2008-03-09 12:34 ` Ingo Molnar
2008-03-09 12:51 ` KOSAKI Motohiro
2008-03-09 13:20 ` Thomas Gleixner
2008-03-09 18:46 ` Andrew Morton
2008-03-09 20:21 ` Andi Kleen
2008-03-10 15:54 ` Christoph Lameter
2008-03-10 16:43 ` Andi Kleen
2008-03-10 17:19 ` Hugh Dickins
2008-03-10 17:25 ` Andi Kleen
2008-03-10 17:31 ` Jeremy Fitzhardinge
2008-03-10 17:53 ` Andi Kleen
2008-03-10 18:35 ` Jeremy Fitzhardinge
2008-03-10 19:06 ` Andi Kleen
2008-03-10 20:54 ` H. Peter Anvin
2008-03-10 21:26 ` Jeremy Fitzhardinge [this message]
2008-03-11 4:07 ` Nick Piggin
2008-03-21 12:52 ` Bart Van Assche
2008-03-21 14:45 ` Ingo Molnar
2008-03-26 7:45 ` Bart Van Assche
2008-03-26 7:53 ` Andrew Morton
2008-03-26 8:13 ` Ingo Molnar
2008-03-26 10:37 ` Bart Van Assche
2008-03-26 16:34 ` Christoph Lameter
2008-03-27 9:48 ` Bart Van Assche
2008-03-09 19:11 ` Arjan van de Ven
2008-03-09 19:25 ` Ingo Molnar
2008-03-09 19:27 ` Ingo Molnar
2008-03-09 19:31 ` Ingo Molnar
2008-03-10 15:57 ` Christoph Lameter
2008-03-10 15:55 ` Christoph Lameter
2008-03-09 12:47 ` KOSAKI Motohiro
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