From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: Sparc ESP problem with blk-mq Date: Wed, 15 Oct 2014 06:35:51 -0700 Message-ID: <20141015133551.GA15539@infradead.org> References: <543D355A.3030605@kernel.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from bombadil.infradead.org ([198.137.202.9]:41475 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750866AbaJONfx (ORCPT ); Wed, 15 Oct 2014 09:35:53 -0400 Content-Disposition: inline In-Reply-To: <543D355A.3030605@kernel.dk> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Jens Axboe Cc: Meelis Roos , linux-scsi@vger.kernel.org, sparclinux@vger.kernel.org, Christoph Hellwig On Tue, Oct 14, 2014 at 08:38:18AM -0600, Jens Axboe wrote: > Christoph, any idea on this? The command just times out, for some reason. > Only thing I could think of was related to perhaps missing bouncing or > similar, but I don't think that's the case. But the hba must not like the > request somehow. Or perhaps it sets up the wrong number of segments. Seems like this is the first command we send. I don't really have an idea at the moment, but it would be good to increase the scsi_logging level to the maximum and/or add some traces to the esp driver to figure out where the command gets lost.