From: Anton Blanchard <anton@samba.org>
To: Jack Steiner <steiner@sgi.com>
Cc: Jes Sorensen <jes@trained-monkey.org>,
Alexander Viro <viro@math.psu.edu>, Andrew Morton <akpm@osdl.org>,
"William Lee Irwin, III" <wli@holomorphy.com>,
linux-kernel@vger.kernel.org, jbarnes@sgi.com
Subject: Re: hash table sizes
Date: Wed, 26 Nov 2003 18:25:53 +1100 [thread overview]
Message-ID: <20031126072553.GF26811@krispykreme> (raw)
In-Reply-To: <20031125231108.GA5675@sgi.com>
> That was a concern to me too. However, on IA64, all page structs are
> in the vmalloc region (it isnt allocated by vmalloc but is in the same
> region as vmalloc'ed pages. They are mapped with 16k pages instead of
> the 64MB pages used for memory allocated by kmalloc).
>
> Before switching to 16K pages for the page structs, we made numerous
> performance measurements. As far as we could tell, there was no
> performce degradation caused by the smaller pages. It seems to me that
> if page structs are ok being mapped by 16k pages, the hash tables
> would be ok too.
OK, on ppc64 with a 4kB base pagesize Id be more worried about using the
vmalloc region.
Anton
next prev parent reply other threads:[~2003-11-26 22:17 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
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 [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-11-26 5:53 Zhang, Yanmin
2003-11-29 10:39 Manfred Spraul
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