From: Andi Kleen <ak@suse.de>
To: "liyu@WAN" <liyu@ccoss.com.cn>
Cc: linux-kernel@vger.kernel.org
Subject: Re: one question about pgd allocation
Date: 01 Jul 2005 15:15:43 +0200 [thread overview]
Message-ID: <p73k6kafz0g.fsf@verdi.suse.de> (raw)
In-Reply-To: <42C53E7D.7090404@ccoss.com.cn.suse.lists.linux.kernel>
"liyu@WAN" <liyu@ccoss.com.cn> writes:
>
> I can not understand this. I search intel developer mannal. but
> nothing to help.
> Who can tell me why?
bit 0 is the present bit which needs to be set on the PGD, otherwise
the CPU will ignore it. A clearer way to write this would have been
__pgd(__pa(pmd) | _PAGE_PRESENT)
-Andi
next parent reply other threads:[~2005-07-01 13:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <42C53E7D.7090404@ccoss.com.cn.suse.lists.linux.kernel>
2005-07-01 13:15 ` Andi Kleen [this message]
2005-07-01 13:00 liyu@WAN
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