From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: Issues with commit 34b48db6 ("block: remove artifical max_hw_sectors cap") Date: Tue, 23 Dec 2014 09:31:40 +0100 Message-ID: <20141223083140.GB2303@lst.de> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from verein.lst.de ([213.95.11.211]:36993 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755096AbaLWIbn (ORCPT ); Tue, 23 Dec 2014 03:31:43 -0500 Content-Disposition: inline In-Reply-To: Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: "Kenneth R. Crudup" Cc: linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org On Sun, Dec 21, 2014 at 02:44:20PM -0800, Kenneth R. Crudup wrote: > > I had issues with my Samsung 4GB disk recently in Linus' master tree kernels, > and have bisected it to the above commit. When doing running bonnie++ (etc. > I get EIOs. > > Some info is below, let me know if you need anything else. Is there a "quirks" > available for this option so I may special-case this particular disk? Looks like we need to quirk it. Can you try to echo different limits to the /sys/block/sdc/queue/max_hw_sectors_kb file for the device to find the limit for it?