Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751827AbbKIHPt (ORCPT ); Mon, 9 Nov 2015 02:15:49 -0500 Received: from mx2.suse.de ([195.135.220.15]:34055 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750785AbbKIHPm (ORCPT ); Mon, 9 Nov 2015 02:15:42 -0500 Message-ID: <5640481C.9000505@suse.de> Date: Mon, 09 Nov 2015 08:15:40 +0100 From: Hannes Reinecke User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: Sinan Kaya , linux-scsi@vger.kernel.org, timur@codeaurora.org, cov@codeaurora.org, jcm@redhat.com CC: agross@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Nagalakshmi Nandigama , Praveen Krishnamoorthy , Sreekanth Reddy , Abhijit Mahajan , "James E.J. Bottomley" , MPT-FusionLinux.pdl@avagotech.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH V2 3/3] scsi: mptxsas: offload IRQ execution References: <1447034266-28003-1-git-send-email-okaya@codeaurora.org> <1447034266-28003-4-git-send-email-okaya@codeaurora.org> In-Reply-To: <1447034266-28003-4-git-send-email-okaya@codeaurora.org> 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 Content-Length: 1187 Lines: 33 On 11/09/2015 02:57 AM, Sinan Kaya wrote: > The mpt2sas and mpt3sas drivers are spinning forever in > their IRQ handlers if there are a lot of jobs queued up > by the PCIe card. This handler is causing spikes for > the rest of the system and sluggish behavior. > > Marking all MSI interrupts as non-shared and moving the > MSI interrupts to thread context. This relexes the rest > of the system execution. > NACK. If there is a scalability issue when handling interrupts it should be fixed in the driver directly. Looking at the driver is should be possible to implement a worker thread handling the reply descriptor, and having the interrupt only to fetch the reply descriptor. Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@suse.de +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N?rnberg GF: F. Imend?rffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG N?rnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/