Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 9 Jul 2002 12:37:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 9 Jul 2002 12:37:55 -0400 Received: from zcars04f.nortelnetworks.com ([47.129.242.57]:54739 "EHLO zcars04f.ca.nortel.com") by vger.kernel.org with ESMTP id ; Tue, 9 Jul 2002 12:37:53 -0400 Message-ID: <3D2B11FA.65A92E40@nortelnetworks.com> Date: Tue, 09 Jul 2002 12:40:26 -0400 X-Sybari-Space: 00000000 00000000 00000000 From: Chris Friesen X-Mailer: Mozilla 4.77 [en] (X11; U; Linux 2.4.18 i686) X-Accept-Language: en MIME-Version: 1.0 To: jbradford@dial.pipex.com Cc: linux-kernel@vger.kernel.org Subject: Re: Recoverable RAM Disk References: <200207091619.RAA00228@darkstar.example.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1127 Lines: 28 jbradford@dial.pipex.com wrote: > > Just wondering - has anyone ever given any thought to the idea of a RAM disk that is not erased on a warm boot? > > Obviously this is a bit architechture-specific - I don't think it's easily do-able on i386, but maybe it is other architechtures? We did it for a product using PowerPC on compactPCI. Critical logs are stored in ram beyond what the kernel uses, and it can be mapped in for processes to use it. As long as the card has power, the information remains available, including resets of the card. The only tricky bit is that I don't know if a warm boot on a PC wipes ram or not... Chris -- Chris Friesen | MailStop: 043/33/F10 Nortel Networks | work: (613) 765-0557 3500 Carling Avenue | fax: (613) 765-2986 Nepean, ON K2H 8E9 Canada | email: cfriesen@nortelnetworks.com - 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/