From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx167.postini.com [74.125.245.167]) by kanga.kvack.org (Postfix) with SMTP id 215EA6B007E for ; Tue, 13 Mar 2012 13:08:59 -0400 (EDT) Date: Tue, 13 Mar 2012 10:08:51 -0700 From: Daniel Walker Subject: Re: [PATCH 0/5] Persist printk buffer across reboots. Message-ID: <20120313170851.GA5218@fifo99.com> References: <1331617001-20906-1-git-send-email-apenwarr@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1331617001-20906-1-git-send-email-apenwarr@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Avery Pennarun Cc: Andrew Morton , Josh Triplett , "Paul E. McKenney" , Ingo Molnar , "David S. Miller" , Peter Zijlstra , "Fabio M. Di Nitto" , Johannes Weiner , Olaf Hering , Paul Gortmaker , Tejun Heo , "H. Peter Anvin" , Yinghai LU , linux-kernel@vger.kernel.org, linux-mm@kvack.org On Tue, Mar 13, 2012 at 01:36:36AM -0400, Avery Pennarun wrote: > The last patch in this series implements a new CONFIG_PRINTK_PERSIST option > that, when enabled, puts the printk buffer in a well-defined memory location > so that we can keep appending to it after a reboot. The upshot is that, > even after a kernel panic or non-panic hard lockup, on the next boot > userspace will be able to grab the kernel messages leading up to it. It > could then upload the messages to a server (for example) to keep crash > statistics. There's currently driver/mtd/mtdoops.c, fs/pstore/, and drivers/staging/android/ram_console.c that do similar things as this. Did you investigate those for potentially modifying them to add this functionality ? If so what issues did you find? I have a arm MSM G1 with persistent memory at 0x16d00000 size 20000bytes.. It's fairly simple you just have to ioremap the memory, but then it's good for writing.. Currently the android ram_console uses this. How would I convert this area for use with your changes? Daniel -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org