linux-kernel - Re: [PATCH v6 05/11] block: remove split code in blkdev_issue_{discard,write

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Message-ID: <yq1mvvcfags.fsf@sermon.lab.mkp.net>
Date:	Wed, 21 Oct 2015 12:33:07 -0400
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Mike Snitzer <snitzer@...hat.com>
Cc:	Christoph Hellwig <hch@...radead.org>, Ming Lin <mlin@...nel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Jens Axboe <axboe@...nel.dk>,
	Kent Overstreet <kent.overstreet@...il.com>,
	Dongsu Park <dpark@...teo.net>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Ming Lin <ming.l@....samsung.com>,
	linux-nvme@...ts.infradead.org
Subject: Re: [PATCH v6 05/11] block: remove split code in blkdev_issue_{discard,write_same}

>>>>> "Mike" == Mike Snitzer <snitzer@...hat.com> writes:

>> That should work for all devices and for dm-thinp (and dm-cache) in
>> particular will ensure that all discards that are issued will be a
>> multiple of the underlying device's blocksize.

Mike> Jeff Moyer pointed out having req_sects be a factor of
Mike> discard_granularity makes more sense.

Absolutely!

-- 
Martin K. Petersen	Oracle Linux Engineering
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