From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752899AbdFVKHB (ORCPT ); Thu, 22 Jun 2017 06:07:01 -0400 Received: from mx2.suse.de ([195.135.220.15]:38344 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752188AbdFVKHA (ORCPT ); Thu, 22 Jun 2017 06:07:00 -0400 Date: Thu, 22 Jun 2017 12:06:57 +0200 From: Johannes Thumshirn To: Yadan Fan Cc: don.brace@microsemi.com, jejb@linux.vnet.ibm.com, martin.petersen@oracle.com, esc.storagedev@microsemi.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] hpsa: limit transfer length to 1MB Message-ID: <20170622100657.GG5670@linux-x5ow.site> References: <20170622095845.4235-1-ydfan@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20170622095845.4235-1-ydfan@suse.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 22, 2017 at 05:58:44PM +0800, Yadan Fan wrote: > The hpsa firmware will bypass the cache for any request larger > than 1MB, so we should cap the request size to avoid any > performance degradation in SLE12-SP2. Upstream doesn't care too much about SLES. > References: bsc#1025461 and our internal Bugzilla IDs How about: The hpsa firmware will bypass the cache for any requests larger than 1MB, so we shoould cap the request size to avoid any performance regressions in kernels later than 4.3 The same applies for Patch 2/2 -- Johannes Thumshirn Storage jthumshirn@suse.de +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850