From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5D35AC2D0E0 for ; Tue, 15 Sep 2020 18:30:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F1D782145D for ; Tue, 15 Sep 2020 18:30:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="iQt0Wubj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728075AbgIOSaP (ORCPT ); Tue, 15 Sep 2020 14:30:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41652 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728002AbgIOSRb (ORCPT ); Tue, 15 Sep 2020 14:17:31 -0400 Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 24754C06174A; Tue, 15 Sep 2020 11:17:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=TpXFc9y8wD3r1ZuGpqIyIgD31aYfhCp2Mbvu/dVpBHo=; b=iQt0WubjIBcofUDJWMFR7iUupl lk2xCKtz3F5Vm17nRnPtlqXMG8bS9S4kr8GvCw66sUZuuFMsx0LivRNIclHnQCWgwXsm8uIkR7Wd+ iEiiMuPsAkoCL5U8Smqu+4oDMrVwam49jLQ26TRnafXau1S8TNxQPiuCpIMvdUC8xA/xw9bnrKcjC mVQ66WngyHdSuno6nChX6yZRsmxhTb3+mPoo2ZHNrd+Nnhb8gJM121PUBjw1UPGG6Ki+05Pp6nmsE 73Xeffy5TiPXq0rB92Dd6gB24GE0m1Bpmy4o7o3ALn1PuyQjptlVLR3eXnfaIrTfpn7QOtdy3gR81 IqFLjWow==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kIFVb-0002aX-1S; Tue, 15 Sep 2020 18:16:51 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 827993006D0; Tue, 15 Sep 2020 20:16:42 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 4DBE3299BA20F; Tue, 15 Sep 2020 20:16:42 +0200 (CEST) Date: Tue, 15 Sep 2020 20:16:42 +0200 From: peterz@infradead.org To: Michal Suchanek Cc: linuxppc-dev@lists.ozlabs.org, Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Nicholas Piggin , Santosh Sivaraj , Christophe Leroy , Ganesh Goudar , Mahesh Salgaonkar , Alistair Popple , Jordan Niethe , Mike Rapoport , "Aneesh Kumar K.V" , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH] Revert "powerpc/64s: machine check interrupt update NMI accounting" Message-ID: <20200915181642.GF2674@hirez.programming.kicks-ass.net> References: <20200915084302.GG29778@kitsune.suse.cz> <20200915180659.12503-1-msuchanek@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200915180659.12503-1-msuchanek@suse.de> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 15, 2020 at 08:06:59PM +0200, Michal Suchanek wrote: > This reverts commit 116ac378bb3ff844df333e7609e7604651a0db9d. > > This commit causes the kernel to oops and reboot when injecting a SLB > multihit which causes a MCE. > > Before this commit a SLB multihit was corrected by the kernel and the > system continued to operate normally. > > cc: stable@vger.kernel.org > Fixes: 116ac378bb3f ("powerpc/64s: machine check interrupt update NMI accounting") > Signed-off-by: Michal Suchanek Ever since 69ea03b56ed2 ("hardirq/nmi: Allow nested nmi_enter()") nmi_enter() supports nesting natively.