Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756531AbXHWBKB (ORCPT ); Wed, 22 Aug 2007 21:10:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753320AbXHWBJw (ORCPT ); Wed, 22 Aug 2007 21:09:52 -0400 Received: from netops-testserver-4-out.sgi.com ([192.48.171.29]:36108 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752110AbXHWBJv (ORCPT ); Wed, 22 Aug 2007 21:09:51 -0400 Date: Wed, 22 Aug 2007 18:09:48 -0700 From: Jeremy Higdon To: "Luck, Tony" Cc: Kamalesh Babulal , Andi Kleen , Andrew Morton , linux-kernel@vger.kernel.org, Balbir Singh , linux-ia64@vger.kernel.org Subject: Re: [BUG] 2.6.23-rc3-mm1 Kernel panic - not syncing: DMA: Memory would be corrupted Message-ID: <20070823010948.GK89849@sgi.com> References: <20070822091959.aa38fd3e.akpm@linux-foundation.org> <20070822172541.GA8058@bingen.suse.de> <46CC811C.9010600@linux.vnet.ibm.com> <617E1C2C70743745A92448908E030B2A023B2D39@scsmsx411.amr.corp.intel.com> <46CCB79E.7070109@linux.vnet.ibm.com> <617E1C2C70743745A92448908E030B2A023B2F6A@scsmsx411.amr.corp.intel.com> <20070822231111.GD89849@sgi.com> <617E1C2C70743745A92448908E030B2A023B2FD5@scsmsx411.amr.corp.intel.com> <20070822235445.GG89849@sgi.com> <617E1C2C70743745A92448908E030B2A023B307D@scsmsx411.amr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <617E1C2C70743745A92448908E030B2A023B307D@scsmsx411.amr.corp.intel.com> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1528 Lines: 31 On Wed, Aug 22, 2007 at 05:05:54PM -0700, Luck, Tony wrote: > > Hmm. Must be something else going on then. It should be less than 1MB > > per ioc plus whatever is used for streaming I/O. > > > > | mptbase: Initiating ioc2 bringup | GSI 16 (level, low) -> CPU 2 (0xc418) vector 50 > > | ioc2: LSI53C1030 C0: Capabilities={Initiator} | ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 16 (level, low) -> > > | DMA: Out of SW-IOMMU space for 263200 bytes at device ? | uhci_hcd 0000:00:1d.0: UHCI Host Controller > > | Kernel panic - not syncing: DMA: Memory would be corrupted | uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus n > > I traced the pci_alloc_consistent calls from PrimeIocFifos on my > system. There are two calls for each ioc. The first is for > 266368 bytes, the second for 16320 bytes. > > I wonder why Kamalesh's system wants the slightly different > amount (263200 bytes) from what my system asks for? > > It also looks to be a little unfriendly to swiotlb to ask for > more than 256K at a time (see IO_TLB_SEGSIZE) in swiotlb.c > > -Tony I believe those would vary a bit based on the exact firmware rev and perhaps nvram settings. Also driver settings, but those are presumably the same. jeremy - 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/