From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from zimbra.linbit.com (zimbra.linbit.com [212.69.161.123]) by mail09.linbit.com (LINBIT Mail Daemon) with ESMTP id 582B7100008C for ; Wed, 30 May 2012 10:40:43 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by zimbra.linbit.com (Postfix) with ESMTP id 3A45B1B435D for ; Wed, 30 May 2012 10:40:43 +0200 (CEST) Received: from zimbra.linbit.com ([127.0.0.1]) by localhost (zimbra.linbit.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3In0auwF9jdN for ; Wed, 30 May 2012 10:40:43 +0200 (CEST) Received: from soda.linbit (tuerlsteher.linbit.com [86.59.100.100]) by zimbra.linbit.com (Postfix) with ESMTP id 1016A1B435B for ; Wed, 30 May 2012 10:40:43 +0200 (CEST) Resent-Message-ID: <20120530084043.GG4141@soda.linbit> Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mail09.linbit.com (LINBIT Mail Daemon) with ESMTP id E0956100008C for ; Sat, 26 May 2012 01:12:45 +0200 (CEST) Date: Sat, 26 May 2012 00:12:33 +0100 From: Alasdair G Kergon To: Kent Overstreet , linux-kernel@vger.kernel.org, linux-bcache@vger.kernel.org, dm-devel@redhat.com, linux-fsdevel@vger.kernel.org, tj@kernel.org, axboe@kernel.dk, agk@redhat.com, neilb@suse.de, drbd-dev@lists.linbit.com, bharrosh@panasas.com, vgoyal@redhat.com, mpatocka@redhat.com, sage@newdream.net, yehuda@hq.newdream.net Message-ID: <20120525231232.GH5761@agk-dp.fab.redhat.com> References: <1337977539-16977-1-git-send-email-koverstreet@google.com> <1337977539-16977-14-git-send-email-koverstreet@google.com> <20120525225852.GG5761@agk-dp.fab.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120525225852.GG5761@agk-dp.fab.redhat.com> Subject: Re: [Drbd-dev] [PATCH v3 13/16] Make generic_make_request handle arbitrarily large bios List-Id: Coordination of development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, May 25, 2012 at 11:58:52PM +0100, Alasdair G Kergon wrote: > I think a body of *empirical* evidence should provide the justification > for this particular change, and until such evidence is forthcoming we > should keep the status quo. What I'm trying to say is, by all means, let's continue to clean up this patch set, but then give it some serious performance testing under different regimes, compare it against the status quo, do whatever tuning seems appropriate then let the results guide us. Alasdair