From: Tejun Heo <htejun@gmail.com>
To: Andi Kleen <ak@suse.de>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: Re: Question regarding x86_64 __PHYSICAL_MASK_SHIFT
Date: Tue, 4 Oct 2005 21:02:10 +0900 [thread overview]
Message-ID: <20051004120210.GA2622@htj.dyndns.org> (raw)
In-Reply-To: <43426EB4.6080703@gmail.com>
Sorry, corrections.
On Tue, Oct 04, 2005 at 08:59:48PM +0900, Tejun Heo wrote:
>
> Hello, Andi.
>
> In include/asm-x86_64/page.h, __VIRTUAL_MASK_SHIFT is defined as 48
> bits which is the size of virtual address space on current x86_64
> machines as used as such. OTOH, __PHYSICAL_MASK_SHIFT is defined as 46
and used as such.
> and used as mask shift for physical page address (i.e. physaddr >> 12).
physical page number (i.e. physaddr >> 12).
Sorry about extra noise, I gotta eat something, feeling dizzy. :-)
--
tejun
next prev parent reply other threads:[~2005-10-04 12:02 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-04 11:59 Question regarding x86_64 __PHYSICAL_MASK_SHIFT Tejun Heo
2005-10-04 12:02 ` Tejun Heo [this message]
2005-10-04 17:24 ` Andi Kleen
2005-10-04 18:52 ` Tejun Heo
2005-10-04 19:01 ` Andi Kleen
2005-10-04 19:19 ` Tejun Heo
2005-10-04 19:27 ` Andi Kleen
2005-10-05 4:01 ` Tejun Heo
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