From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roland Dreier Subject: Re: [PATCH 2/3] iscsi iser: increase max_sectors Date: Mon, 05 May 2008 13:43:39 -0700 Message-ID: References: <20080212205252.GB13643@osc.edu> <20080212205420.GD13643@osc.edu> <481F0D6A.9050301@Voltaire.COM> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from sj-iport-5.cisco.com ([171.68.10.87]:51813 "EHLO sj-iport-5.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756999AbYEEUnk (ORCPT ); Mon, 5 May 2008 16:43:40 -0400 In-Reply-To: <481F0D6A.9050301@Voltaire.COM> (Erez Zilber's message of "Mon, 05 May 2008 16:36:42 +0300") Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Erez Zilber Cc: Pete Wyckoff , Roland Dreier , Mike Christie , linux-scsi > This could be problematic because, AFAIK, some HCAs (memfree, I think) > don't support FMRs of more than 2MB. Roland, am I right? Mem-free HCAs don't support FMRs where the list of pages is bigger than a page itself. So yes, with 4 KB pages, you get 512 * 4 KB that way. Of course the current iSER driver has much bigger FMR problems, since some adapters don't support FMRs at all... - R.