Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758519Ab1DYLao (ORCPT ); Mon, 25 Apr 2011 07:30:44 -0400 Received: from mail-ey0-f174.google.com ([209.85.215.174]:59989 "EHLO mail-ey0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758386Ab1DYLam (ORCPT ); Mon, 25 Apr 2011 07:30:42 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=RZI2lGb5GxLmLxrgV+3inuob4uVqCz359SuCN+2BUpd6XLqGjPvRms/6rwfwLz8Mj4 D4AJ2MCIkmvinhCo2iQiionWi1wFt4ymBpF2Lv7CGs742p4+hgs5nwfY5zvl9g1KSL2L v99kvOCQZtmXXZ/v1Blj2z3TMQrxWXTD95bMs= Date: Mon, 25 Apr 2011 13:30:36 +0200 From: Tejun Heo To: Bruce Stenning Cc: Mark Lord , "linux-kernel@vger.kernel.org" , "linux-ide@vger.kernel.org" Subject: Re: sata_mv port lockup on hotplug (kernel 2.6.38.2) Message-ID: <20110425113036.GL17734@mtj.dyndns.org> References: <4D9CD275.9000002@teksavvy.com> <4D9FACC9.7020200@teksavvy.com> <4DA45CA7.9040102@teksavvy.com> <4DA467FB.6020905@teksavvy.com> <20110423005610.GC1576@mtj.dyndns.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 830 Lines: 18 On Mon, Apr 25, 2011 at 12:07:04PM +0100, Bruce Stenning wrote: > Tejun, what does it mean to limit a sata link to UDMA/100? I thought that this > was only for ata devices, and sata devices have the choice of 1.5Gbps, 3Gbps, > or 6 Gbps. Is that a false assumption? Is it related to early sata devices that > were still somewhat based on parallel ata designs? Yeap, devices behind SATA-PATA bridge were still affected by the transfer mode so libata tries to slow them down too along with link speed when limiting speed due to errors. Shouldn't affect native SATA devices. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/