From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chandra Seetharaman Subject: Re: [PATCH 7/9] scsi_dh: Add support for SDEV_PASSIVE Date: Mon, 11 Feb 2008 10:27:46 -0800 Message-ID: <1202754466.13537.123.camel@linuxchandra> References: <20080124003010.18871.84095.sendpatchset@localhost.localdomain> <20080124003203.18871.52040.sendpatchset@localhost.localdomain> <1202151498.3096.84.camel@localhost.localdomain> <1202156151.13537.14.camel@linuxchandra> <1202156914.3096.112.camel@localhost.localdomain> <1202159970.13537.19.camel@linuxchandra> <20080209124511.GB28967@parisc-linux.org> Reply-To: sekharan@us.ibm.com, device-mapper development Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20080209124511.GB28967@parisc-linux.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Matthew Wilcox Cc: Mike Anderson , michaelc@cs.wisc.edu, linux-scsi@vger.kernel.org, James Bottomley , dm-devel@redhat.com, jens.axboe@oracle.com List-Id: linux-scsi@vger.kernel.org On Sat, 2008-02-09 at 05:45 -0700, Matthew Wilcox wrote: > On Mon, Feb 04, 2008 at 01:19:30PM -0800, Chandra Seetharaman wrote: > > The device does send these error messages currently, but it takes some > > time to get the check condition back, which adds up the time to boot > > especially when the # of LUNS is huge. > > > > For example, in my test configuration, I had 40 luns, and the time > > difference (with this patch and without it) to boot is 171 seconds and > > 1426 seconds. > > Was that with sync or async SCSI bus scanning? I didn't change anything, IOW, i did default scanning, which I would guess sync ?! > -- ---------------------------------------------------------------------- Chandra Seetharaman | Be careful what you choose.... - sekharan@us.ibm.com | .......you may get it. ----------------------------------------------------------------------