From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0AADAC04EBD for ; Tue, 16 Oct 2018 08:29:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D3682205C9 for ; Tue, 16 Oct 2018 08:29:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D3682205C9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727067AbeJPQS0 (ORCPT ); Tue, 16 Oct 2018 12:18:26 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:52647 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726539AbeJPQS0 (ORCPT ); Tue, 16 Oct 2018 12:18:26 -0400 Received: from DGGEMS412-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 88F52C54093EE; Tue, 16 Oct 2018 16:29:05 +0800 (CST) Received: from [127.0.0.1] (10.202.226.41) by DGGEMS412-HUB.china.huawei.com (10.3.19.212) with Microsoft SMTP Server id 14.3.399.0; Tue, 16 Oct 2018 16:28:55 +0800 Subject: Re: [PATCH 0/7] hisi_sas: Misc bugfixes and an optimisation patch To: "Martin K. Petersen" References: <1537801594-207139-1-git-send-email-john.garry@huawei.com> CC: , , , From: John Garry Message-ID: <956dafea-bca3-f3a0-318e-83399b84605c@huawei.com> Date: Tue, 16 Oct 2018 09:28:51 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.202.226.41] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 16/10/2018 05:28, Martin K. Petersen wrote: > > 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. > Great, thanks.