From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" Subject: Re: [PATCH V2] hpsa: remove coalescing settings for ioaccel2 Date: Tue, 31 Jan 2017 21:51:52 -0500 Message-ID: References: <148581391749.10289.15802474685670424837.stgit@brunhilda> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from aserp1040.oracle.com ([141.146.126.69]:39079 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751064AbdBACwv (ORCPT ); Tue, 31 Jan 2017 21:52:51 -0500 In-Reply-To: <148581391749.10289.15802474685670424837.stgit@brunhilda> (Don Brace's message of "Mon, 30 Jan 2017 16:05:17 -0600") Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Don Brace Cc: jejb@linux.vnet.ibm.com, john.hall@microsemi.com, Kevin.Barnett@microsemi.com, Mahesh.Rajashekhara@microsemi.com, bader.alisaleh@microsemi.com, hch@infradead.org, scott.teel@microsemi.com, Viswas.G@microsemi.com, Justin.Lindley@microsemi.com, scott.benesh@microsemi.com, elliott@hpe.com, POSWALD@suse.com, linux-scsi@vger.kernel.org >>>>> "Don" == Don Brace writes: Don> - Setting coalescing has a significant negative impact on low Don> queue-depth performance. - Does not help high queue-depth Don> performance. Applied to 4.11/scsi-queue. -- Martin K. Petersen Oracle Linux Engineering