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From: Anton Blanchard <anton@samba.org>
To: Momchil Velikov <velco@fadata.bg>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Scalable page cache - take two
Date: Mon, 24 Dec 2001 11:52:58 +1100	[thread overview]
Message-ID: <20011224005258.GB15536@krispykreme> (raw)
In-Reply-To: <87bsgp7fcq.fsf@fadata.bg>
In-Reply-To: <87bsgp7fcq.fsf@fadata.bg>

 
Hi,

> This is the second mutation of the scalable page cache patch.  It:

I ran the dbench test over it just to annoy Andrew:

http://samba.org/~anton/linux/pagecache_locking/2/

This is the still 12 way ppc64, the results are similar to the last
test. It confirms that the current pagecache locking is a bottleneck
for larger SMP machines.

We quickly hit the following spinlocks with the pagecache lock out of
the way:

ext2_get_block: BKL
refile_buffer: lru_list_lock
remove_from_queues: lru_list_lock
try_to_free_buffers: lru_list_lock
d_lookup: dcache_lock
ext2_discard_prealloc: BKL

Is someone working on removing the BKL from ext2 in 2.5?

Anton

  parent reply	other threads:[~2001-12-24  0:55 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-12-23 22:15 [PATCH] Scalable page cache - take two Momchil Velikov
2001-12-24  0:28 ` William Lee Irwin III
2001-12-24  0:52 ` Anton Blanchard [this message]
2001-12-27  6:15   ` Daniel Phillips
2001-12-24 17:08 ` Heinz Diehl

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