From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: [regression]2.6.25-rc4: boot panic on alpha Date: Fri, 7 Mar 2008 08:23:05 +0100 Message-ID: <20080307072304.GA25351@elte.hu> References: <20080307034155.A8C6EDBA2@gherkin.frus.com> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <20080307034155.A8C6EDBA2@gherkin.frus.com> Sender: linux-alpha-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Bob Tracy Cc: linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, FUJITA Tomonori [Cc:-ed FUJITA Tomonori who did the Alpha IOMMU changes - full report from Bob quoted below.] Bob, does latest -git boot if you revert these 4 commits: commit d5a4630a0daad241c761064295958554472ed491 Author: FUJITA Tomonori Date: Tue Mar 4 14:28:58 2008 -0800 alpha: remove unused DEBUG_FORCEDAC define in IOMMU commit cf5401454863df8e6dc3ebe8faad09141cbec187 Author: FUJITA Tomonori Date: Tue Mar 4 14:28:57 2008 -0800 alpha: make IOMMU respect the segment boundary limits commit 23d7e0390ab57cf15a5cfe8d6806192f0997e5a8 Author: FUJITA Tomonori Date: Tue Mar 4 14:28:57 2008 -0800 alpha: IOMMU had better access to the free space bitmap at only one place commit 3c5f1def7dd50b792f56dcf7378c2684c06947f3 Author: FUJITA Tomonori Date: Tue Mar 4 14:28:54 2008 -0800 alpha: convert IOMMU to use ALIGN() Ingo * Bob Tracy wrote: > The regression is relative to 2.6.25-rc1 + timer fixes (added when > I reported the problems with 2.6.25-rc1 relative to 2.6.24). I haven't > tried -rc2 or -rc3. > > Might be related to similar reports I've seen, but wanted to add the > Alpha platform to the list. The -rc4 kernel boots, but at some point > following initialization of the SCSI layer, there's a panic with enough > diagnostic output that a 50-line screen can't hold it all. Unfortunately, > the system logging isn't active, so nothing gets captured. > > The panic is completely reproducible. The "Code" line at the bottom > of the panic output is > > 44220001 4821f621 4821b681 4821f62b f420004f 00000081 <0000009b> 0066c012 > > The first line of the "Trace" section is > > [] iommu_arena_alloc+0x64/0xe0 > > Platform is an Alpha PWS 433au. gcc is version 4.1.2 (Debian 4.1.1-21). > > -- > ------------------------------------------------------------------------ > Bob Tracy | "I was a beta tester for dirt. They never did > rct@frus.com | get all the bugs out." - Steve McGrew on /. > ------------------------------------------------------------------------ > -- > 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/