RE: [PATCH] backing dev unplugging

Kenneth Chen
2004-03-10T20:04:21Z

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