linux-kernel - Re: [PATCH-v2 11/17] target/iblock: Add blk

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Message-ID: <yq1bnz4bx2x.fsf@sermon.lab.mkp.net>
Date:	Tue, 21 Jan 2014 20:54:14 -0500
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
Cc:	Sagi Grimberg <sagig@....mellanox.co.il>,
	"Nicholas A. Bellinger" <nab@...erainc.com>,
	target-devel <target-devel@...r.kernel.org>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Christoph Hellwig <hch@....de>, Hannes Reinecke <hare@...e.de>,
	Sagi Grimberg <sagig@...lanox.com>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Roland Dreier <roland@...nel.org>
Subject: Re: [PATCH-v2 11/17] target/iblock: Add blk_integrity + BIP passthrough support

>>>>> "nab" == Nicholas A Bellinger <nab@...ux-iscsi.org> writes:

>> Please remind me why we ignore IP-CSUM guard type again?  MKP, will
>> this be irrelevant for the initiator as well? if so, I don't see a
>> reason to expose this in RDMA verbs.

nab> My understanding is that this was used for pre-production
nab> prototyping, and is not supported by any real backend storage
nab> hardware.

We are shipping several products with support for the IP checksum. But
it's between application and initiator only. From there on it's all T10
CRC as required by the spec.

-- 
Martin K. Petersen	Oracle Linux Engineering
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