From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753987Ab0KKPiu (ORCPT ); Thu, 11 Nov 2010 10:38:50 -0500 Received: from canuck.infradead.org ([134.117.69.58]:42395 "EHLO canuck.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751233Ab0KKPiu convert rfc822-to-8bit (ORCPT ); Thu, 11 Nov 2010 10:38:50 -0500 Subject: Re: [PATCH 03/20] x86, mce: Add persistent MCE event From: Peter Zijlstra To: Borislav Petkov Cc: Ingo Molnar , Ben Gamari , "acme@infradead.org" , "fweisbec@gmail.com" , "rostedt@goodmis.org" , "linux-kernel@vger.kernel.org" In-Reply-To: <20101111133442.GA21803@aftab> References: <1288885016-18295-1-git-send-email-bp@amd64.org> <1288885016-18295-4-git-send-email-bp@amd64.org> <87lj50vq0s.fsf@gmail.com> <20101110222157.GA23945@elte.hu> <20101111061725.GA19321@aftab> <20101111085825.GB18789@elte.hu> <20101111133442.GA21803@aftab> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Date: Thu, 11 Nov 2010 16:38:50 +0100 Message-ID: <1289489930.2084.138.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2010-11-11 at 14:34 +0100, Borislav Petkov wrote: > 3) enable the persistent event and stash its fd in some /sysfs member > which the RAS daemon reads out and mmaps. This last one actually sounds > pretty neat. Right, stashing the thing in sysfs, which you can open()+mmap() seems the best way. Not sure you want to make it a RAS specific place, maybe a generic persistent buffer place. You'll get multiple files anyway, one per cpu, so maybe something like: /sysfs/persistent_buffer/ras[0..n]