From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Axboe Subject: Re: [PATCH] block: remove artifical max_hw_sectors cap Date: Tue, 21 Oct 2014 14:02:26 -0600 Message-ID: <5446BBD2.8040306@kernel.dk> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pa0-f48.google.com ([209.85.220.48]:51290 "EHLO mail-pa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932500AbaJUUC1 (ORCPT ); Tue, 21 Oct 2014 16:02:27 -0400 Received: by mail-pa0-f48.google.com with SMTP id ey11so112842pad.7 for ; Tue, 21 Oct 2014 13:02:27 -0700 (PDT) In-Reply-To: <20141017131247.GA16538@infradead.org> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Christoph Hellwig , "Elliott, Robert (Server Storage)" Cc: "linux-kernel@vger.kernel.org" , "linux-scsi@vger.kernel.org" , Wu Fengguang 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