From: Andrew Morton <akpm@osdl.org>
To: jbarnes@sgi.com (Jesse Barnes)
Cc: steiner@sgi.com, jes@trained-monkey.org, viro@math.psu.edu,
wli@holomorphy.com, linux-kernel@vger.kernel.org
Subject: Re: hash table sizes
Date: Tue, 25 Nov 2003 13:24:39 -0800 [thread overview]
Message-ID: <20031125132439.3c3254ff.akpm@osdl.org> (raw)
In-Reply-To: <20031125211424.GA32636@sgi.com>
jbarnes@sgi.com (Jesse Barnes) wrote:
>
> On Tue, Nov 25, 2003 at 01:07:41PM -0800, Andrew Morton wrote:
> > the size of these tables dependent upon the number of dentries/inodes/etc
> > which the system is likely to support. And that does depend upon the
> > amount of direct-addressible memory.
> >
> >
> > So hum. As a starting point, what happens if we do:
> >
> > - vfs_caches_init(num_physpages);
> > + vfs_caches_init(min(num_physpages, pages_in_ZONE_NORMAL));
> >
> > ?
>
> Something like that might be ok, but on our system, all memory is in
> ZONE_DMA...
>
Well yes, we'd want
vfs_caches_init(min(num_physpages, some_platform_limit()));
which on ia32 would evaluate to nr_free_buffer_pages() and on ia64 would
evaluate to the size of one of those zones.
If the machine has zillions of small zones then perhaps this will result in
an undersized hashtable.
next prev parent reply other threads:[~2003-11-25 21:24 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-25 13:35 hash table sizes Jes Sorensen
2003-11-25 13:42 ` William Lee Irwin III
2003-11-25 13:54 ` Jes Sorensen
2003-11-25 16:25 ` Thomas Schlichter
2003-11-25 17:52 ` Antonio Vargas
2003-11-25 17:54 ` William Lee Irwin III
2003-11-25 20:48 ` Jack Steiner
2003-11-25 21:07 ` Andrew Morton
2003-11-25 21:14 ` Jesse Barnes
2003-11-25 21:24 ` Andrew Morton [this message]
2003-11-26 2:14 ` David S. Miller
2003-11-26 5:27 ` Matt Mackall
2003-11-28 14:15 ` Jes Sorensen
2003-11-28 14:52 ` Jack Steiner
2003-11-28 16:22 ` Jes Sorensen
2003-11-28 19:35 ` Jack Steiner
2003-11-28 21:18 ` Jörn Engel
2003-12-01 9:46 ` Jes Sorensen
2003-12-01 21:06 ` Anton Blanchard
2003-12-01 22:57 ` Martin J. Bligh
2003-11-25 21:16 ` Anton Blanchard
2003-11-25 23:11 ` Jack Steiner
2003-11-26 3:39 ` Rik van Riel
2003-11-26 3:59 ` William Lee Irwin III
2003-11-26 4:25 ` Andrew Morton
2003-11-26 4:23 ` William Lee Irwin III
2003-11-26 5:14 ` Martin J. Bligh
2003-11-26 9:51 ` William Lee Irwin III
2003-11-26 16:17 ` Martin J. Bligh
2003-11-26 7:25 ` Anton Blanchard
2003-11-26 5:53 Zhang, Yanmin
2003-11-29 10:39 Manfred Spraul
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