Date: Wed, 10 Mar 2004 11:55:45 -0800
From: Andrew Morton <akpm@osdl.org>
To: Jens Axboe <axboe@suse.de>
Cc: linux-kernel@vger.kernel.org, kenneth.w.chen@intel.com,
       thornber@redhat.com
Subject: Re: [PATCH] backing dev unplugging
Message-Id: <20040310115545.16cb387f.akpm@osdl.org>
In-Reply-To: <20040310124507.GU4949@suse.de>
References: <20040310124507.GU4949@suse.de>
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Jens Axboe <axboe@suse.de> wrote:
>
> Here's a first cut at killing global plugging of block devices to reduce
> the nasty contention blk_plug_lock caused. This introduceds per-queue
> plugging, controlled by the backing_dev_info.

This is such an improvement over what we have now it isn't funny.

Ken, the next -mm is starting to look like linux-3.1.0 so I think it
would be best if you could benchmark Jens's patch against 2.6.4-rc2-mm1.
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