Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752171AbYJWEUD (ORCPT ); Thu, 23 Oct 2008 00:20:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750777AbYJWETw (ORCPT ); Thu, 23 Oct 2008 00:19:52 -0400 Received: from rv-out-0506.google.com ([209.85.198.232]:33677 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750734AbYJWETv (ORCPT ); Thu, 23 Oct 2008 00:19:51 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references:x-google-sender-auth; b=kExX4mLYwW+Oyi/eLTfjlmTJ7onVS6+BMwrWDeomqaPqyZlzrrSE6RggzowByZamTE 2P4S8mXIv+UTpIQjTUYfe8XD/vC4JL8wUWxFPvM84KsYJQVGjz2BSlytJXB5ZBuEXmc4 EHDqrCjiapRTSq8KCsg4HlQ5b4L5V+owcrKc0= Message-ID: <86802c440810222119l7f06f11bgf84cb66e5c232b8f@mail.gmail.com> Date: Wed, 22 Oct 2008 21:19:50 -0700 From: "Yinghai Lu" To: "Matthew Wilcox" Subject: Re: [PATCH] pci: show dma_mask bits in /sys Cc: "Grant Grundler" , "Jesse Barnes" , "Ingo Molnar" , "Thomas Gleixner" , "H. Peter Anvin" , "Andrew Morton" , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org In-Reply-To: <20081023032833.GK26094@parisc-linux.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <1223506943-6543-1-git-send-email-yinghai@kernel.org> <20081009211837.GC18444@colo.lackof.org> <48EE7745.2020603@kernel.org> <20081009213551.GC25780@parisc-linux.org> <86802c440810091451y4a3caceg1abaa75464c40a72@mail.gmail.com> <20081009225533.GB1914@colo.lackof.org> <48EE8E55.4000009@kernel.org> <20081012071157.GA20056@colo.lackof.org> <48FFD726.2010600@kernel.org> <20081023032833.GK26094@parisc-linux.org> X-Google-Sender-Auth: 83a6a22c12443394 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 806 Lines: 21 On Wed, Oct 22, 2008 at 8:28 PM, Matthew Wilcox wrote: > On Wed, Oct 22, 2008 at 06:45:10PM -0700, Yinghai Lu wrote: >> Grant prefer to add it /sys instead of showing in bootlog >> >> so could catch if the driver set the correct dma_mask. > > I still don't think this is useful information to be exposing. > RHEL 4.6 driver sata_mv is very run out of gart IOMMU, and need iommu apterture to be 512M... when loading is high, and it turns out every those card support 64bit DMA, the driver DID NOT set dma to 64bit so it still use 32 bit... YH -- 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/