From: Robert Love <rml@tech9.net>
To: Ravikiran G Thirumalai <kiran@in.ibm.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: How reliable is SLAB_HWCACHE_ALIGN?
Date: Wed, 10 Sep 2003 11:41:04 -0400 [thread overview]
Message-ID: <1063208464.700.35.camel@localhost> (raw)
In-Reply-To: <20030910081654.GA1129@llm08.in.ibm.com>
On Wed, 2003-09-10 at 04:16, Ravikiran G Thirumalai wrote:
> Am I missing something or can there really be two objects on the same
> cacheline even when SLAB_HWCACHE_ALIGN is specified?
No, you are right.
If your object _must_ be cache aligned, use SLAB_MUST_HWCACHE_ALIGN.
But note that this will result in cache aligning objects even if it ends
of wasting a _lot_ of space, such as when debugging is turned on.
I think we only use it for the task_struct_cachep.
Robert Love
next prev parent reply other threads:[~2003-09-10 15:41 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-10 8:16 How reliable is SLAB_HWCACHE_ALIGN? Ravikiran G Thirumalai
2003-09-10 15:41 ` Robert Love [this message]
2003-09-11 5:54 ` Ravikiran G Thirumalai
2003-09-11 11:08 ` [patch] Make slab allocator work with SLAB_MUST_HWCACHE_ALIGN Ravikiran G Thirumalai
2003-09-11 16:19 ` Manfred Spraul
2003-09-11 21:49 ` Manfred Spraul
2003-09-12 8:59 ` Ravikiran G Thirumalai
2003-09-12 9:10 ` Arjan van de Ven
2003-09-13 20:06 ` Manfred Spraul
2003-09-13 20:58 ` Dipankar Sarma
2003-09-14 8:09 ` Ravikiran G Thirumalai
2003-09-14 13:00 ` Dipankar Sarma
2003-09-15 5:13 ` Ravikiran G Thirumalai
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