From: Long Pu <long.pu@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: Why is clear_user_highpage necessary in do_anonymous_page()?
Date: Thu, 23 Sep 2004 08:35:31 +0800 [thread overview]
Message-ID: <516c87e80409221735b1b6a92@mail.gmail.com> (raw)
In-Reply-To: <516c87e8040922022973701fff@mail.gmail.com>
I wonder why clear_user_highpage is necessary if we don't concern security.
When we write to a anonymous page the very first time, we don't care
whatever the original contents of that page is. And
clear_user_highpage() takes a lot of cpu time under certain workload
such as compiling kernel.
Is there any reason I don't know to reserve it?
parent reply other threads:[~2004-09-23 0:35 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <516c87e8040922022973701fff@mail.gmail.com>]
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