From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 27 Feb 2004 07:32:57 -0800 (PST) From: Linus Torvalds Subject: Re: mapped page in prep_new_page().. In-Reply-To: <1077878329.22925.321.camel@gaston> Message-ID: References: <20040226225809.669d275a.akpm@osdl.org> <1077878329.22925.321.camel@gaston> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Benjamin Herrenschmidt Cc: Andrew Morton , hch@infradead.org, linux-mm@kvack.org, Anton Blanchard List-ID: On Fri, 27 Feb 2004, Benjamin Herrenschmidt wrote: > > > Heh. I've had this G5 thing for a couple of weeks, I'm not very good at > > reading the oops dump either ;) > > DAR is the access address for a 300 trap Yeah, that makes complete sense now. "DAR" and "300 trap". I should have seen it immediately. I'm not entirely sure if it's just me being very very used to x86, but let's see what Linux historically (ie on an x86) prints out on a kernel page fault: Unable to handle kernel paging request at virtual address 41648370 printing eip: c013f6bc ... and here's what ppc64 prints out: Oops: Kernel access of bad area, sig: 11 [#1] NIP: C00000000008D7C4 XER: 0000000020000000 LR: C000000000086F70 REGS: c00000007a43b7f0 TRAP: 0300 Not tainted ... And I'm sure it's clear as glass what that's all about. Can you read your assembly language too? IBM people must just be smarter than the rest of us. Linus -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org