From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752923AbaETLAz (ORCPT ); Tue, 20 May 2014 07:00:55 -0400 Received: from mail.skyhub.de ([78.46.96.112]:59217 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751853AbaETLAx (ORCPT ); Tue, 20 May 2014 07:00:53 -0400 Date: Tue, 20 May 2014 13:00:31 +0200 From: Borislav Petkov To: "H. Peter Anvin" Cc: Matt Fleming , Ingo Molnar , linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, "Luck, Tony" Subject: Re: [GIT PULL] EFI changes for v3.16 Message-ID: <20140520110031.GD16428@pd.tnic> References: <20140503130447.GW26088@console-pimps.org> <20140519105129.GF4798@console-pimps.org> <537A8A03.8060604@zytor.com> <20140519231012.GF6311@pd.tnic> <537A9EFD.9050208@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <537A9EFD.9050208@zytor.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, May 19, 2014 at 05:17:01PM -0700, H. Peter Anvin wrote: > I thought the whole point of allowing pstore in IRQ context was to > write oopsen (panics?) Right, so Tony meant last time we were talking about it that nvram is too slow for collecting the whole dmesg into it (could mess up timing and such - although, come to think of it, we do have CONFIG_PRINTK_TIME so we can sort them if they're out of order...) So what I'm questioning is whether a single oops/panic can be written out to nvram reliably too? Because if not, then the problem we're trying to solve is moot and beside the point - maybe we should not use EFI as a pstore backend in irq context at all? I'm just putting it on the table so that we have talked about it too, before devising a solution. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --