From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754717AbaIVSCY (ORCPT ); Mon, 22 Sep 2014 14:02:24 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:48356 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753592AbaIVSCX (ORCPT ); Mon, 22 Sep 2014 14:02:23 -0400 Date: Mon, 22 Sep 2014 11:02:20 -0700 From: Christoph Hellwig To: Chris J Arges Cc: linux-scsi@vget.kernel.org, bruce.lucas@mongodb.com, Nagalakshmi Nandigama , Praveen Krishnamoorthy , Sreekanth Reddy , Abhijit Mahajan , MPT-FusionLinux.pdl@avagotech.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mptfusion: enable no_write_same in scsi_host_template Message-ID: <20140922180220.GA10166@infradead.org> References: <1411408690-4766-1-git-send-email-chris.j.arges@canonical.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1411408690-4766-1-git-send-email-chris.j.arges@canonical.com> 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 Mon, Sep 22, 2014 at 12:56:59PM -0500, Chris J Arges wrote: > When using a virtual SCSI disk in a VMWare VM if blkdev_issue_zeroout is used > data can be improperly zeroed out using the mptfusion driver. This patch > disables write_same for this driver which ensures that manual zeroing out > is used instead. Does this affet real hardware or is it a VMware bug? If it's just the latter we should simply blacklist VMware.