From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933008AbaJUUC3 (ORCPT ); Tue, 21 Oct 2014 16:02:29 -0400 Received: from mail-pa0-f54.google.com ([209.85.220.54]:35444 "EHLO mail-pa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932569AbaJUUC2 (ORCPT ); Tue, 21 Oct 2014 16:02:28 -0400 Message-ID: <5446BBD2.8040306@kernel.dk> Date: Tue, 21 Oct 2014 14:02:26 -0600 From: Jens Axboe User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: Christoph Hellwig , "Elliott, Robert (Server Storage)" CC: "linux-kernel@vger.kernel.org" , "linux-scsi@vger.kernel.org" , Wu Fengguang Subject: Re: [PATCH] block: remove artifical max_hw_sectors cap References: <1410044885-14893-1-git-send-email-hch@lst.de> <20141001130822.GA5362@infradead.org> <94D0CD8314A33A4D9D801C0FE68B402958CC7BAB@G4W3202.americas.hpqcorp.net> <20141001211258.GB24820@infradead.org> <20141017131247.GA16538@infradead.org> In-Reply-To: <20141017131247.GA16538@infradead.org> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/17/2014 07:12 AM, Christoph Hellwig wrote: > On Wed, Oct 01, 2014 at 02:12:58PM -0700, Christoph Hellwig wrote: >> On Wed, Oct 01, 2014 at 06:59:34PM +0000, Elliott, Robert (Server Storage) wrote: >>> One supporting example: A low limit interferes with creation of >>> full stripe writes for RAID controllers. >> >> Yes, both Linux mdraid and parity raids are often crippled by the >> default. The mdadm default of 512kb for each chunk combined with >> the default limit very much guarantees a horrible out of the box >> experience. > > Jens, can you apply this patch once the 3.19 queue opens? Yup, lets get it applied. -- Jens Axboe