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Re: MADV_DONTNEED

To: "Stephen C. Tweedie" <sct@redhat.com>
Subject: Re: MADV_DONTNEED
From: Jamie Lokier <jamie.lokier@cern.ch>
Date: Wed, 22 Mar 2000 18:33:07 +0100
Cc: Chuck Lever <cel@monkey.org>, linux-mm@kvack.org
In-Reply-To: <20000322171045.D2850@redhat.com>; from Stephen C. Tweedie on Wed, Mar 22, 2000 at 05:10:45PM +0000
References: <20000321022937.B4271@pcep-jamie.cern.ch> <Pine.BSO.4.10.10003221125170.16476-100000@funky.monkey.org> <20000322171045.D2850@redhat.com>
Sender: owner-linux-mm@kvack.org

Stephen C. Tweedie wrote:
> > function 3 (could be MADV_ZERO):
> >   discard pages.  if they are referenced again, the process sees C-O-W 
> >   zeroed pages.

Fwiw, I don't think MADV_ZERO is particularly useful.
You can just read /dev/zero over that memory range.

-- Jamie
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- Re: MADV_DONTNEED
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