From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 27 Feb 2004 18:31:27 +1100 From: Anton Blanchard Subject: Re: mapped page in prep_new_page().. Message-ID: <20040227073127.GC5801@krispykreme> References: <20040226225809.669d275a.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org Return-Path: To: Linus Torvalds Cc: Andrew Morton , hch@infradead.org, linux-mm@kvack.org, Benjamin Herrenschmidt List-ID: > Yeah, I wouldn't be surprised if it is an architecture bug (possibly > one that has been common but has long been fixed on x86). Its possible, I think Ive seen this before on a pseries box before. > The ppc64 page fault oops thing seems to be braindead, and not even print > out the address. Stupid. Somebody is too used to debuggers, and as a > result users aren't helped to make good reports, hint hint.. DAR is the address. I should probably make it more obvious, Ive been somewhat IBMized with my TLAs. > Who would write the value quadword 0x0000005F00000000 to the physical > address 1<<24? And is that a valid "struct page *" in the first place? > Probably. > > Bad pointer crapola? Or some subtle CPU bug with address arithmetic that > crosses the 16MB border? Anton, BenH, any ideas? Interesting, but nothing springs to mind yet. Anton -- 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