Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752856AbaJAVND (ORCPT ); Wed, 1 Oct 2014 17:13:03 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:52638 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751682AbaJAVNA (ORCPT ); Wed, 1 Oct 2014 17:13:00 -0400 Date: Wed, 1 Oct 2014 14:12:58 -0700 From: Christoph Hellwig To: "Elliott, Robert (Server Storage)" Cc: Christoph Hellwig , Jens Axboe , "linux-kernel@vger.kernel.org" , "linux-scsi@vger.kernel.org" , Wu Fengguang Subject: Re: [PATCH] block: remove artifical max_hw_sectors cap Message-ID: <20141001211258.GB24820@infradead.org> References: <1410044885-14893-1-git-send-email-hch@lst.de> <20141001130822.GA5362@infradead.org> <94D0CD8314A33A4D9D801C0FE68B402958CC7BAB@G4W3202.americas.hpqcorp.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <94D0CD8314A33A4D9D801C0FE68B402958CC7BAB@G4W3202.americas.hpqcorp.net> User-Agent: Mutt/1.5.23 (2014-03-12) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. -- 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/