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From: Daniel Phillips <phillips@bonn-fries.net>
To: Anton Blanchard <anton@samba.org>, Momchil Velikov <velco@fadata.bg>
Subject: Re: [PATCH] Scalable page cache - take two
Date: Thu, 27 Dec 2001 07:15:01 +0100
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On December 24, 2001 01:52 am, Anton Blanchard wrote:
> 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?

Al has already done most of the work, it won't take much to complete it.  It 
wasn't a priority before 2.5 (stability was).

It's nice to see somebody still cares about the speed of Ext2 ;)

--
Daniel
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