From: Christoph Lameter <clameter@sgi.com>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, dgc@sgi.com,
Mel Gorman <mel@csn.ul.ie>
Subject: Re: [RFC 0/3] Slab Defrag / Slab Targeted Reclaim and general Slab API changes
Date: Sat, 5 May 2007 08:39:19 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0705050835480.26574@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <463C1900.7060409@cosmosbay.com>
On Sat, 5 May 2007, Eric Dumazet wrote:
> > Then add ___cacheline_aligned_in_smp or specify the alignment in the various
> > other ways that exist. Practice is that most slabs specify
> > SLAB_HWCACHE_ALIGN. So most slabs are cache aligned today.
>
> Yes but this alignement is dynamic, not at compile time.
>
> include/asm-i386/processor.h:739:#define cache_line_size()
> (boot_cpu_data.x86_cache_alignment)
Ahh.. I did not see that before.
> So adding ____cacheline_aligned to 'struct file' for example would be a
> regression for people with PII or PIII
Yuck.
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prev parent reply other threads:[~2007-05-05 15:39 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-04 22:15 clameter
2007-05-04 22:15 ` [RFC 1/3] SLUB: slab_ops instead of constructors / destructors clameter
2007-05-05 10:14 ` Pekka Enberg
2007-05-05 15:43 ` Christoph Lameter
2007-05-06 19:19 ` Bert Wesarg
2007-05-06 19:46 ` Satyam Sharma
2007-05-04 22:15 ` [RFC 2/3] SLUB: Implement targeted reclaim and partial list defragmentation clameter
2007-05-04 23:03 ` Christoph Lameter
2007-05-05 1:04 ` Randy Dunlap
2007-05-05 1:07 ` Christoph Lameter
2007-05-05 5:32 ` William Lee Irwin III
2007-05-05 15:35 ` Christoph Lameter
2007-05-05 10:38 ` Andi Kleen
2007-05-05 15:42 ` Christoph Lameter
2007-05-05 17:11 ` Andi Kleen
2007-05-09 15:05 ` Mel Gorman
2007-05-09 16:34 ` Christoph Lameter
2007-05-04 22:15 ` [RFC 3/3] Support targeted reclaim and slab defrag for dentry cache clameter
2007-05-05 5:07 ` [RFC 0/3] Slab Defrag / Slab Targeted Reclaim and general Slab API changes Eric Dumazet
2007-05-05 5:14 ` Christoph Lameter
2007-05-05 5:41 ` Eric Dumazet
2007-05-05 7:37 ` Eric Dumazet
2007-05-05 15:39 ` Christoph Lameter [this message]
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