From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755411AbcBPPd6 (ORCPT ); Tue, 16 Feb 2016 10:33:58 -0500 Received: from mx2.suse.de ([195.135.220.15]:44357 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755252AbcBPPd5 (ORCPT ); Tue, 16 Feb 2016 10:33:57 -0500 Subject: Re: [PATCH 5/6] hisi_sas: add hisi_sas_slave_configure() To: John Garry , JBottomley@odin.com, martin.petersen@oracle.com References: <1455625351-165881-1-git-send-email-john.garry@huawei.com> <1455625351-165881-6-git-send-email-john.garry@huawei.com> Cc: linuxarm@huawei.com, zhangfei.gao@linaro.org, xuwei5@hisilicon.com, john.garry2@mail.dcu.ie, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org From: Hannes Reinecke Message-ID: <56C34163.70606@suse.de> Date: Tue, 16 Feb 2016 16:33:55 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.5.0 MIME-Version: 1.0 In-Reply-To: <1455625351-165881-6-git-send-email-john.garry@huawei.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/16/2016 01:22 PM, John Garry wrote: > In high-datarate aging tests, it is found that > the SCSI framework can periodically > issue lu resets to the device. This is because scsi > commands begin to timeout. It is found that TASK SET > FULL may be returned many times for the same command, > causing the timeouts. > To overcome this, the queue depth for the device needs > to be reduced to 64 (from 256, set in > sas_slave_configure()). > Hmm. TASK SET FULL should cause the queue depth to be reduced automatically, no? Cheers, Hannes -- Dr. Hannes Reinecke Teamlead Storage & Networking hare@suse.de +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg)