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From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Pavel Machek <pavel@ucw.cz>
Cc: Yinghai Lu <yinghai@kernel.org>, Ingo Molnar <mingo@elte.hu>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>, Len Brown <lenb@kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	pm list <linux-pm@lists.linux-foundation.org>
Subject: Re: [PATCH] x86: make sure wakeup code is below 1M -v2
Date: Thu, 12 Nov 2009 20:32:46 +0100	[thread overview]
Message-ID: <200911122032.46872.rjw@sisk.pl> (raw)
In-Reply-To: <20091112073616.GA11365@elf.ucw.cz>

On Thursday 12 November 2009, Pavel Machek wrote:
> On Tue 2009-11-10 18:27:23, Yinghai Lu wrote:
> > 
> > try to find_e820_area/reserve_early, and call acpi_reserve_memory early
> > 
> > to get area is below 1M
> 
> Does it fix anything? I can't tell from the changelog...

Yes, it does.  If the area is above 1M, we can't run real mode code from it.

This matters for NUMA machines supporting S3 (yes, there are a few models
out there).

Thanks,
Rafael

  parent reply	other threads:[~2009-11-12 19:32 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-11-09  8:51 [RFC PATCH] x86: make sure wakeup code is below 1M Yinghai Lu
2009-11-09 12:15 ` Rafael J. Wysocki
2009-11-11  2:27   ` [PATCH] x86: make sure wakeup code is below 1M -v2 Yinghai Lu
2009-11-11  7:48     ` Ingo Molnar
2009-11-11  7:57       ` H. Peter Anvin
2009-11-11  9:56       ` Rafael J. Wysocki
2009-11-11  9:12     ` ykzhao
2009-11-11 19:05       ` Yinghai Lu
2009-11-12  1:17         ` ykzhao
2009-11-12  3:12           ` Yinghai Lu
2009-11-12  3:37             ` ykzhao
2009-11-12  5:21               ` Yinghai Lu
2009-11-12  7:14                 ` ykzhao
2009-11-12  7:20                   ` H. Peter Anvin
2009-11-12  7:43                 ` ykzhao
2009-11-11 20:30     ` [tip:x86/mm] x86: Make sure wakeup trampoline code is below 1MB tip-bot for Yinghai Lu
2009-11-12  7:36     ` [PATCH] x86: make sure wakeup code is below 1M -v2 Pavel Machek
2009-11-12 19:25       ` Yinghai Lu
2009-11-12 19:32       ` Rafael J. Wysocki [this message]
2009-11-13  7:36         ` Ingo Molnar
2009-11-13  8:04           ` H. Peter Anvin
2009-11-13  8:12             ` Ingo Molnar

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