Message-Id: <200403102003.i2AK3qm16576@unix-os.sc.intel.com>
From: "Kenneth Chen" <kenneth.w.chen@intel.com>
To: "'Andrew Morton'" <akpm@osdl.org>, "Jens Axboe" <axboe@suse.de>
Cc: <linux-kernel@vger.kernel.org>, <thornber@redhat.com>
Subject: RE: [PATCH] backing dev unplugging
Date: Wed, 10 Mar 2004 12:03:52 -0800
Thread-Index: AcQG2W8rodshR8XpS2iBDfBt64JimwAADDbg
In-Reply-To: <20040310115545.16cb387f.akpm@osdl.org>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 946
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Andrew Morton wrote on Wednesday, March 10, 2004 11:56 AM
> 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.

I'm planning on couple experiments: one is just Jens's change on top of
what we have so we can validate the backing dev unplug. Then we will run
2.6.4-rc2-mm1 + Jens's patch.

- Ken


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