Re: [PATCH] backing dev unplugging

From: Jens Axboe
Date: Wed Mar 10 2004 - 15:21:02 EST

On Wed, Mar 10 2004, Andrew Morton wrote:
> Jens Axboe <axboe@xxxxxxx> 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.

It is pretty scary, once I dove into it...

Jens Axboe

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