From: Benjamin LaHaise <bcrl@redhat.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Momchil Velikov <velco@fadata.bg>,
linux-kernel <linux-kernel@vger.kernel.org>,
"David S. Miller" <davem@redhat.com>
Subject: Re: [PATCH] Scalable page cache
Date: Mon, 26 Nov 2001 13:34:50 -0500 [thread overview]
Message-ID: <20011126133450.C13955@redhat.com> (raw)
In-Reply-To: <20011126131641.A13955@redhat.com> <Pine.LNX.4.33.0111262115261.17043-100000@localhost.localdomain>
In-Reply-To: <Pine.LNX.4.33.0111262115261.17043-100000@localhost.localdomain>; from mingo@elte.hu on Mon, Nov 26, 2001 at 09:29:39PM +0100
On Mon, Nov 26, 2001 at 09:29:39PM +0100, Ingo Molnar wrote:
> this is a misunderstanding of the problem. The reason why the
> pagecache_lock is a performance problem is *not* contention, the reason is
> *not* the length of chains, or any other reason you listed. The problem is
> SMP cacheline invalidation costs, due to using the same cacheline from
> multiple CPUs. Thus the spreading out of locking gives good SMP cacheline
> usage properties.
Please reply to the rest of the message. Perhaps that item is a
misunderstanding, but the rest of it is applicable across the board.
-ben
next prev parent reply other threads:[~2001-11-26 18:37 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-26 12:31 [PATCH] Scalable page cache Momchil Velikov
2001-11-26 17:22 ` Ingo Molnar
2001-11-26 17:23 ` Momchil Velikov
2001-11-26 18:16 ` Benjamin LaHaise
2001-11-26 18:42 ` Rik van Riel
2001-11-26 20:29 ` Ingo Molnar
2001-11-26 18:33 ` David S. Miller
2001-11-26 19:29 ` Andrew Morton
2001-11-26 19:35 ` David S. Miller
2001-11-26 18:34 ` Benjamin LaHaise [this message]
2001-11-26 20:40 ` Ingo Molnar
2001-11-26 19:19 ` Benjamin LaHaise
2001-11-26 21:00 ` Ingo Molnar
2001-11-26 20:43 ` Daniel Phillips
2001-11-26 19:49 ` Ingo Molnar
2001-11-26 18:08 ` Christoph Hellwig
2001-11-26 20:13 ` Ingo Molnar
2001-11-26 21:09 ` Ingo Molnar
2001-11-26 19:18 ` David S. Miller
2001-11-26 19:45 ` Andrew Morton
2001-11-26 19:57 ` David S. Miller
2001-11-26 20:03 ` Andrew Morton
2001-11-26 20:37 ` Linus Torvalds
2001-11-26 21:02 ` Andrew Morton
2001-11-26 22:23 ` Linus Torvalds
2001-11-26 22:49 ` Jeff Garzik
2001-11-26 23:06 ` Linus Torvalds
2001-11-26 21:10 ` Ingo Molnar
2001-11-26 17:29 ` Linus Torvalds
2001-11-26 20:03 ` Ingo Molnar
2001-11-26 18:02 ` David S. Miller
2001-11-26 18:11 ` Rik van Riel
2001-11-27 8:07 ` benchmark results: " Anton Blanchard
2001-11-26 18:52 ` [PATCH] " Daniel Phillips
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