From: Eric Dumazet <dada1@cosmosbay.com>
To: Ravikiran G Thirumalai <kiran@scalex86.org>
Cc: Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org,
"Shai Fultheim (Shai@scalex86.org)" <shai@scalex86.org>,
Alok Kataria <alokk@calsoftinc.com>
Subject: Re: [patch] Additions to .data.read_mostly section
Date: Thu, 25 Aug 2005 00:38:02 +0200 [thread overview]
Message-ID: <430CF6CA.8040302@cosmosbay.com> (raw)
In-Reply-To: <20050824214610.GA3675@localhost.localdomain>
Ravikiran G Thirumalai a écrit :
> Following patch moves a few static 'read mostly' variables to the
> .data.read_mostly section. Typically these are vector - irq tables,
> boot_cpu_data, node_maps etc., which are initialized once and read from
> often and rarely written to. Please include.
>
Good candidates for read_mostly are all the 'kmem_cache_t *xxx_cache'
slab was carefuly designed to eliminate cache line ping pongs on SMP, but if
the initial pointer to slab sits in a heavily modified cache line, we loose.
Eric
next prev parent reply other threads:[~2005-08-24 22:38 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-24 21:46 [patch] Additions to .data.read_mostly section Ravikiran G Thirumalai
2005-08-24 22:38 ` Eric Dumazet [this message]
2005-08-25 7:56 ` Arjan van de Ven
2005-08-25 8:45 ` [PATCH] removes filp_count_lock and changes nr_files type to atomic_t Eric Dumazet
2005-08-25 9:05 ` Arjan van de Ven
2005-08-25 9:20 ` Eric Dumazet
2005-08-25 9:31 ` Arjan van de Ven
2005-08-25 9:08 ` Christoph Hellwig
2005-08-25 9:17 ` Eric Dumazet
2005-08-25 9:23 ` Christoph Hellwig
2005-08-25 10:41 ` Eric Dumazet
2005-08-25 11:11 ` Nick Piggin
2005-08-25 12:26 ` Eric Dumazet
2005-08-25 14:51 ` Nick Piggin
2005-08-25 14:56 ` Christoph Hellwig
2005-08-25 15:13 ` Eric Dumazet
2005-08-25 18:19 ` Dipankar Sarma
2005-08-25 18:36 ` Christoph Hellwig
2005-08-26 1:16 ` Nick Piggin
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