From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" Subject: Re: [PATCH v3 0/5] scsi_debug: add write scattered support Date: Mon, 08 Jan 2018 22:20:24 -0500 Message-ID: References: <20171223174814.3902-1-dgilbert@interlog.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from userp2130.oracle.com ([156.151.31.86]:34528 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750913AbeAIDUe (ORCPT ); Mon, 8 Jan 2018 22:20:34 -0500 In-Reply-To: <20171223174814.3902-1-dgilbert@interlog.com> (Douglas Gilbert's message of "Sat, 23 Dec 2017 12:48:09 -0500") Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Douglas Gilbert Cc: linux-scsi@vger.kernel.org, martin.petersen@oracle.com, Bart.VanAssche@wdc.com, hare@suse.de Douglas, > While testing the WRITE SCATTERED command support in a new sg3_utils > utility (sg_write_x) it was helpful to have a target that supported > this command. This command might be attractive to other kernel > subsystems. Even if end devices don't support this command yet, it > would most likely be a performance win if SCSI LLDs supported it (by > breaking it down to a series of WRITE commands), as that would cut > down the overhead of the block layer, the ULD (e.g. sd) and the SCSI > midlevel. Applied to 4.16/scsi-queue, thanks! -- Martin K. Petersen Oracle Linux Engineering