From: Christoph Lameter <clameter@sgi.com>
To: Matt Mackall <mpm@selenic.com>
Cc: Pekka J Enberg <penberg@cs.helsinki.fi>,
Mel Gorman <mel@csn.ul.ie>,
linux-mm@kvack.org
Subject: Re: [patch 6/8] slub: Adjust order boundaries and minimum objects per slab.
Date: Mon, 3 Mar 2008 14:36:52 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.0803031434510.5149@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20080303213412.GD10223@waste.org>
On Mon, 3 Mar 2008, Matt Mackall wrote:
> On the other hand, a single object can now pin 64k in memory rather
> than 4k. So when we collapse some cache under memory pressure, we're
> not likely to free as much.
Right.
> I know you've put a lot of effort into dealing with the dcache and
> icache instances of this, but this could very well offset most of that.
I developed and tested the icache and dcache stuff with order 3 allocs
(when mm still had the initial higher order page use without fallbacks).
> Also, we might consider only allocating an order-1 slab if we've
> filled an order-0, and so on. When we hit pressure, we kick our
> order counter back to 0.
Hmmmm... Interesting idea. Is doable now since the size of the individual
slab is no longer fixed.
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next prev parent reply other threads:[~2008-03-03 22:36 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20080229044803.482012397@sgi.com>
[not found] ` <20080229044820.044485187@sgi.com>
2008-02-29 8:13 ` [patch 7/8] slub: Make the order configurable for each slab cache Pekka Enberg
2008-02-29 19:37 ` Christoph Lameter
2008-03-01 9:47 ` Pekka Enberg
2008-03-03 17:49 ` Christoph Lameter
2008-03-03 22:56 ` Pekka Enberg
2008-03-03 23:36 ` Christoph Lameter
[not found] ` <20080229044820.298792748@sgi.com>
2008-02-29 8:13 ` [patch 8/8] slub: Simplify any_slab_object checks Pekka Enberg
[not found] ` <20080229044819.800974712@sgi.com>
2008-02-29 8:19 ` [patch 6/8] slub: Adjust order boundaries and minimum objects per slab Pekka Enberg
2008-02-29 19:41 ` Christoph Lameter
2008-03-01 9:58 ` Pekka J Enberg
2008-03-03 17:52 ` Christoph Lameter
2008-03-03 21:34 ` Matt Mackall
2008-03-03 22:36 ` Christoph Lameter [this message]
[not found] ` <20080229044818.999367120@sgi.com>
2008-02-29 8:59 ` [patch 3/8] slub: Update statistics handling for variable order slabs Pekka Enberg
2008-02-29 19:43 ` Christoph Lameter
2008-03-01 10:29 ` Pekka Enberg
2008-03-04 12:20 ` [patch 0/8] slub: Fallback to order 0 and variable order slab support Mel Gorman
2008-03-04 18:53 ` Christoph Lameter
2008-03-05 18:28 ` Mel Gorman
2008-03-05 18:52 ` Christoph Lameter
2008-03-06 22:04 ` Mel Gorman
2008-03-06 22:18 ` Christoph Lameter
2008-03-07 12:17 ` Mel Gorman
2008-03-07 19:50 ` Christoph Lameter
2008-03-04 19:01 ` Matt Mackall
2008-03-05 0:04 ` Christoph Lameter
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