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From: Mike Snitzer <snitzer@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>,
	linux-raid@vger.kernel.org, linux-mm@kvack.org,
	linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-block@vger.kernel.org, drbd-dev@tron.linbit.com,
	dm-devel@redhat.com, Tejun Heo <tj@kernel.org>,
	cgroups@vger.kernel.org, linux-btrfs@vger.kernel.org
Subject: Re: remove dead bdi congestion leftovers
Date: Wed, 1 Jul 2020 12:41:03 -0400
Message-ID: <20200701164103.GC27063@redhat.com> (raw)
In-Reply-To: <20200701090622.3354860-1-hch@lst.de>

On Wed, Jul 01 2020 at  5:06am -0400,
Christoph Hellwig <hch@lst.de> wrote:

> Hi Jens,
> 
> we have a lot of bdi congestion related code that is left around without
> any use.  This series removes it in preparation of sorting out the bdi
> lifetime rules properly.

I could do some git archeology to see what the fs, mm and block core
changes were to stop using bdi congested but a pointer to associated
changes (or quick recap) would save me some time.

Also, curious to know how back-pressure should be felt back up the IO
stack now? (apologies if these are well worn topics, I haven't been
tracking this area of development).

Thanks,
Mike



  parent reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-01  9:06 Christoph Hellwig
2020-07-01  9:06 ` [PATCH 1/4] drbd: remove a bogus bdi_rw_congested call Christoph Hellwig
2020-07-01  9:06 ` [PATCH 2/4] writeback: remove {set,clear}_wb_congested Christoph Hellwig
2020-07-01  9:06 ` [PATCH 3/4] writeback: remove struct bdi_writeback_congested Christoph Hellwig
2020-07-01  9:06 ` [PATCH 4/4] writeback: remove bdi->congested_fn Christoph Hellwig
2020-07-01 14:48   ` David Sterba
2020-07-02  0:38   ` Coly Li
2020-07-02  5:36   ` Song Liu
2020-07-01 16:38 ` remove dead bdi congestion leftovers Tejun Heo
2020-07-01 16:41 ` Mike Snitzer [this message]
2020-07-01 17:57   ` Matthew Wilcox
2020-07-01 18:25     ` Matthew Wilcox
2020-07-08 23:14 ` Jens Axboe
2020-07-09  5:32   ` Christoph Hellwig
2020-07-09 13:58     ` Jens Axboe
2020-07-09 14:01       ` Christoph Hellwig

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