From: Andrew Morton <akpm@osdl.org>
To: Matt Mackall <mpm@selenic.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] shrink core hashes on small systems
Date: Mon, 5 Apr 2004 14:38:24 -0700 [thread overview]
Message-ID: <20040405143824.7f9b7020.akpm@osdl.org> (raw)
In-Reply-To: <20040405211916.GH6248@waste.org>
Matt Mackall <mpm@selenic.com> wrote:
>
> Longer term, I think some serious thought needs to go into scaling
> hash sizes across the board, but this serves my purposes on the
> low-end without changing behaviour asymptotically.
Can we make longer-term a bit shorter? init_per_zone_pages_min() only took
a few minutes thinking..
I suspect what we need is to replace num_physpages with nr_free_pages(),
then account for PAGE_SIZE, then muck around with sqrt() for a while then
apply upper and lower bounds to it.
That hard-wired breakpoint seems just too arbitrary to me - some sort of
graduated thing which has a little thought and explanation behind it would
be preferred please.
next prev parent reply other threads:[~2004-04-05 21:41 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-05 20:49 Matt Mackall
2004-04-05 21:02 ` Andrew Morton
2004-04-05 21:19 ` Matt Mackall
2004-04-05 21:38 ` Andrew Morton [this message]
2004-04-05 22:59 ` Matt Mackall
2004-04-06 6:31 ` Bryan Rittmeyer
2004-04-07 5:21 ` Marcelo Tosatti
2004-04-07 18:10 ` Matt Mackall
2004-04-07 22:53 ` Benjamin Herrenschmidt
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