From: Christoph Lameter <clameter@sgi.com>
To: akpm@linux-foundation.org
Cc: linux-mm@kvack.org
Subject: Re: Dquot slab cache: Fix competing alignments
Date: Sat, 5 May 2007 10:29:08 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0705051028310.27873@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0705042218140.21707@schroedinger.engr.sgi.com>
Do not apply since this includes removing SLAB_HWCACHE_ALIGN.
On Fri, 4 May 2007, Christoph Lameter wrote:
> There is a competing specification of an alignment and hardware
> cache alignment in the kmem_cache_create call. Remove the cache
> alignments. Convert call to use a macro and specify cache line alignment
> on the struct.
>
> Signed-off-by: Christoph Lameter <clameter@sgi.com>
>
> Index: slub/fs/dquot.c
> ===================================================================
> --- slub.orig/fs/dquot.c 2007-05-04 21:56:20.000000000 -0700
> +++ slub/fs/dquot.c 2007-05-04 22:17:50.000000000 -0700
> @@ -1848,11 +1848,8 @@ static int __init dquot_init(void)
>
> register_sysctl_table(sys_table);
>
> - dquot_cachep = kmem_cache_create("dquot",
> - sizeof(struct dquot), sizeof(unsigned long) * 4,
> - (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
> - SLAB_MEM_SPREAD|SLAB_PANIC),
> - NULL, NULL);
> + dquot_cachep = KMEM_CACHE(dquot,
> + SLAB_MEM_SPREAD|SLAB_RECLAIM_ACCOUNT|SLAB_PANIC);
>
> order = 0;
> dquot_hash = (struct hlist_head *)__get_free_pages(GFP_ATOMIC, order);
> Index: slub/include/linux/quota.h
> ===================================================================
> --- slub.orig/include/linux/quota.h 2007-05-04 22:06:09.000000000 -0700
> +++ slub/include/linux/quota.h 2007-05-04 22:06:54.000000000 -0700
> @@ -225,7 +225,7 @@ struct dquot {
> unsigned long dq_flags; /* See DQ_* */
> short dq_type; /* Type of quota */
> struct mem_dqblk dq_dqb; /* Diskquota usage */
> -};
> +} ____cacheline_aligned;
>
> #define NODQUOT (struct dquot *)NULL
>
>
> --
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prev parent reply other threads:[~2007-05-05 17:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-05 5:19 Christoph Lameter
2007-05-05 17:29 ` Christoph Lameter [this message]
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