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From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Nick Piggin <npiggin@suse.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [rfc][patch] dynamic resizing dentry hash using RCU
Date: Sat, 24 Feb 2007 13:07:23 +0900 [thread overview]
Message-ID: <20070224130723.01f3c429.kamezawa.hiroyu@jp.fujitsu.com> (raw)
In-Reply-To: <20070223153743.GA26141@wotan.suse.de>
On Fri, 23 Feb 2007 16:37:43 +0100
Nick Piggin <npiggin@suse.de> wrote:
> +static void dcache_hash_resize(unsigned int new_shift);
> +static void mod_nr_dentry(int mod)
> +{
> + unsigned long dentry_size;
> +
> + dentry_stat.nr_dentry += mod;
> +
> + dentry_size = 1 << dentry_hash->shift;
> + if (unlikely(dentry_stat.nr_dentry > dentry_size+(dentry_size>>1)))
> + dcache_hash_resize(dentry_hash->shift+1);
> + else if (unlikely(dentry_stat.nr_dentry < (dentry_size>>1)))
> + dcache_hash_resize(dentry_hash->shift-1);
> +}
> +
Do we need to do this kind of resizing in implicit automatic way ?
I think it's good to show contention rate by /proc and add sysctl for
resize this.
-Kame
next prev parent reply other threads:[~2007-02-24 4:08 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-23 15:37 Nick Piggin
2007-02-23 16:31 ` Eric Dumazet
2007-02-24 1:08 ` Nick Piggin
2007-02-23 17:25 ` Zach Brown
2007-02-24 1:26 ` Nick Piggin
2007-02-24 2:07 ` Nick Piggin
2007-02-24 1:31 ` Michael K. Edwards
2007-02-24 1:52 ` Nick Piggin
2007-02-24 4:07 ` KAMEZAWA Hiroyuki [this message]
2007-02-24 5:15 ` Nick Piggin
2007-02-24 4:24 ` William Lee Irwin III
2007-02-24 5:09 ` Nick Piggin
2007-02-24 22:56 ` William Lee Irwin III
2007-02-25 0:56 ` David Miller
2007-02-25 2:15 ` William Lee Irwin III
2007-02-25 6:21 ` Paul E. McKenney
2007-03-05 4:11 ` David Miller
2007-03-05 4:27 ` Nick Piggin
2007-03-05 4:38 ` David Miller
2007-03-05 4:42 ` Nick Piggin
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