From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Martin K. Petersen" Subject: Re: [PATCH 0/7] hisi_sas: Misc bugfixes and an optimisation patch Date: Tue, 16 Oct 2018 00:28:32 -0400 Message-ID: References: <1537801594-207139-1-git-send-email-john.garry@huawei.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: (John Garry's message of "Fri, 12 Oct 2018 11:47:05 +0100") Sender: linux-kernel-owner@vger.kernel.org To: John Garry Cc: "Martin K. Petersen" , jejb@linux.vnet.ibm.com, linuxarm@huawei.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-scsi@vger.kernel.org John, > As I mentioned in the thread that spawned from this, we actually can't > expose multiple hw queues at the moment. And, if we did, we find a > performance drop due to having to go back to manage this IPTT > internally. > > So how to handle? We're going to continue to work towards exposing > multiple queues to upper layer, but for the moment I think patch 6/7 is > a good change. Thanks for the discussion. That's exactly what I was looking for. Applied to 4.20/scsi-queue. -- Martin K. Petersen Oracle Linux Engineering