Re: [PATCH 14/25] sd: implement unmapping Write Zeroes

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Subject: Re: [PATCH 14/25] sd: implement unmapping Write Zeroes
From: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Date: Wed, 05 Apr 2017 07:48:51 -0400
Cc: axboe@xxxxxxxxx, linux-raid@xxxxxxxxxxxxxxx, martin.petersen@xxxxxxxxxx, snitzer@xxxxxxxxxx, philipp.reisner@xxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, dm-devel@xxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, lars.ellenberg@xxxxxxxxxx, shli@xxxxxxxxxx, agk@xxxxxxxxxx, drbd-dev@xxxxxxxxxxxxxxxx
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In-reply-to: <20170331163313.31821-15-hch@lst.de> (Christoph Hellwig's message of "Fri, 31 Mar 2017 18:33:02 +0200")
Organization: Oracle Corporation
References: <20170331163313.31821-1-hch@lst.de> <20170331163313.31821-15-hch@lst.de>
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux)

Christoph Hellwig <hch@xxxxxx> writes:

> Try to use a write same with unmap bit variant if the device supports it
> and the caller allows for it.

Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>

-- 
Martin K. Petersen	Oracle Linux Engineering

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References:
- always use REQ_OP_WRITE_ZEROES for zeroing offload
  - From: Christoph Hellwig
- [PATCH 14/25] sd: implement unmapping Write Zeroes
  - From: Christoph Hellwig

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