From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: sata_sil24 performance weirdness Date: Thu, 28 Dec 2006 12:55:04 +0900 Message-ID: <45934018.4090005@gmail.com> References: <20061227134503.GD28939@curie-int.orbis-terrarum.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from wx-out-0506.google.com ([66.249.82.231]:14901 "EHLO wx-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964901AbWL1DzO (ORCPT ); Wed, 27 Dec 2006 22:55:14 -0500 Received: by wx-out-0506.google.com with SMTP id h27so4441587wxd for ; Wed, 27 Dec 2006 19:55:13 -0800 (PST) In-Reply-To: <20061227134503.GD28939@curie-int.orbis-terrarum.net> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: "Robin H. Johnson" Cc: linux-ide@vger.kernel.org Robin H. Johnson wrote: > I forward-ported Tejun's PMP patches to libata#upstream (my first attempt at it > a few weeks ago failed, but this round works fine, tested at each branch > stage), and in using them, I have noticed a bit of oddity. Great, care to share them? > While dmesg claims that 3.0Gbps was negotiated, the combined performance of the > 5 disks never exceeds 1.5Gbps, no matter how I combine them. Is something in > the driver overriding the 3Gbps speed bits somewhere? Nope. I'll ask SIMG. -- tejun