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X-Comment-To: William Lee Irwin III
To: William Lee Irwin III <wli@holomorphy.com>
Cc: Rik van Riel <riel@surriel.com>, Paul Albrecht <palbrecht@uswest.net>,
       linux-kernel@vger.kernel.org
Subject: Re: 2.4 vm, program load, page faulting, ...
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From: Alex Tomas <bzzz@tmi.comex.ru>
Organization: HOME
Date: 17 Mar 2003 19:37:22 +0300
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>>>>> William Lee Irwin (WLI) writes:

 WLI> On Mon, Mar 17, 2003 at 10:02:21AM -0500, Rik van Riel wrote:
 >> The mmap() syscall only sets up the VMA info, it doesn't fill in
 >> the page tables. That only happens when the process page faults.
 >> Note that filling in a bunch of page table entries mapping already
 >> present pagecache pages at exec() time might be a good idea.  It's
 >> just that nobody has gotten around to that yet...

 WLI> SVR4 did and saw an improvement wrt. page fault rate, according
 WLI> to Vahalia.

 WLI> I'd like to see whether this is useful for Linux.

I tried this on dual P3 year and half ago and didn't see any improvement


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