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From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	hch@lst.de, martin.petersen@oracle.com
Subject: Re: [PATCH 3/9] blk-mq: expose write hints through debugfs
Date: Tue, 27 Jun 2017 17:17:25 +0200	[thread overview]
Message-ID: <20170627151725.GA28403@lst.de> (raw)
In-Reply-To: <1498491480-16306-4-git-send-email-axboe@kernel.dk>

On Mon, Jun 26, 2017 at 09:37:54AM -0600, Jens Axboe wrote:
> Useful to verify that things are working the way they should.
> Reading the file will return number of kb written with each
> write hint. Writing the file will reset the statistics. No care
> is taken to ensure that we don't race on updates.
> 
> Drivers will write to q->write_hints[] if they handle a given
> write hint.

How about moving the accounting itself to blk-mq as well?  Just noticed
that it's completely generic while looking over the nvme patch.

  reply	other threads:[~2017-06-27 15:17 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-26 15:37 [PATCHSET v10] Add support for write life time hints Jens Axboe
2017-06-26 15:37 ` [PATCH 1/9] fs: add fcntl() interface for setting/getting " Jens Axboe
2017-06-27 14:42   ` Christoph Hellwig
2017-06-27 14:52     ` Christoph Hellwig
2017-06-27 14:55     ` Jens Axboe
2017-06-27 14:57       ` Christoph Hellwig
2017-06-27 14:58         ` Jens Axboe
2017-06-27 15:09     ` Jens Axboe
2017-06-27 15:16       ` Christoph Hellwig
2017-06-27 15:18         ` Jens Axboe
2017-06-26 15:37 ` [PATCH 2/9] block: add support for write hints in a bio Jens Axboe
2017-06-26 15:37 ` [PATCH 3/9] blk-mq: expose write hints through debugfs Jens Axboe
2017-06-27 15:17   ` Christoph Hellwig [this message]
2017-06-27 15:20     ` Jens Axboe
2017-06-26 15:37 ` [PATCH 4/9] fs: add O_DIRECT support for sending down write life time hints Jens Axboe
2017-06-27 14:53   ` Christoph Hellwig
2017-06-26 15:37 ` [PATCH 5/9] fs: add support for buffered writeback to pass down write hints Jens Axboe
2017-06-26 15:37 ` [PATCH 6/9] ext4: add support for passing in write hints for buffered writes Jens Axboe
2017-06-26 15:37 ` [PATCH 7/9] xfs: " Jens Axboe
2017-06-26 15:37 ` [PATCH 8/9] btrfs: " Jens Axboe
2017-06-26 15:38 ` [PATCH 9/9] nvme: add support for streams and directives Jens Axboe

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