From: "Jan Beulich" <JBeulich@novell.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: <linux-kernel@vger.kernel.org>
Subject: Re: patch disabling use of PSE on Atom CPUs with a certain erratum
Date: Thu, 07 Oct 2010 15:01:29 +0100 [thread overview]
Message-ID: <4CADEED9020000780001B44F@vpn.id2.novell.com> (raw)
In-Reply-To: <4CADCF23.5070800@zytor.com>
>>> On 07.10.10 at 15:46, "H. Peter Anvin" <hpa@zytor.com> wrote:
> On 10/07/2010 02:12 AM, Jan Beulich wrote:
>> In commit 7a0fc404ae663776e96db43879a0fa24fec1fa3a you
>> disable use of PSE, but I wonder how this can take any effect on
>> 64-bit CPUs, as they use large pages during early boot already.
>> Those pages, when use of PSE gets disabled, will get broken up
>> into 4k pages in phys_pmd_init(), thus actually increasing the
>> chances that you hit the erratum.
>>
>> What am I missing?
>>
>
> Those Atoms don't have 64-bit support.
That's different from what I found looking around on the web.
Jan
next prev parent reply other threads:[~2010-10-07 14:01 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-07 9:12 Jan Beulich
2010-10-07 13:46 ` H. Peter Anvin
2010-10-07 14:01 ` Jan Beulich [this message]
2010-10-07 14:08 ` H. Peter Anvin
2010-10-07 14:52 ` Jan Beulich
2010-10-07 15:10 ` H. Peter Anvin
2010-10-07 15:29 ` Jan Beulich
2010-10-07 15:32 ` H. Peter Anvin
2010-10-18 23:23 ` Yuhong Bao
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