From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Barnes Date: Mon, 12 Jul 2004 17:59:24 +0000 Subject: Re: BUG 2.6.7 hangs on boot (rx2600) Message-Id: <200407121059.24067.jbarnes@engr.sgi.com> List-Id: References: <20040622061505.GA23075@cup.hp.com> In-Reply-To: <20040622061505.GA23075@cup.hp.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org On Thursday, July 8, 2004 11:31 am, Chen, Kenneth W wrote: > It is something related to stack pointer (r12). If sp stays in region 7 > (providing there is a corresponding dtr mapping), kernel boots fine. That's what I'm seeing too, any ideas where to look for the problem? I'm happy to test any patches you might have :) I'm not really sure what's going on, but it looks like it might be: _start -> start_kernel -> setup_arch -> ia64_mmu_init -> ptc.e -> page fault -> die which would indicate (given that we know that the ptc.e arguments are valid) that we're purging a TC entry that keeps us going up to that point, and that we're not using the region 5 mapping like we should. Does that sound right at all? > David > mentioned that MCA code also has tpa thingy in it that needs to be > converted. But that's not the cause of the problem we're seeing, right? > One other thing I'm getting frustrated at is I'm keep on > receiving mca while doing a ptc.e (only on sgi altix). Have no idea why. You don't think this is a symptom of the region 7 vs. region 5 problem? It looks to me like we're doing the ptc.e with the same arguments in either case... Thanks, Jesse