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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A776CEB64D8 for ; Wed, 14 Jun 2023 13:45:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245077AbjFNNpw (ORCPT ); Wed, 14 Jun 2023 09:45:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50306 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245065AbjFNNpu (ORCPT ); Wed, 14 Jun 2023 09:45:50 -0400 Received: from mail.sdinet.de (hydra.sdinet.de [136.243.3.21]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C08B2102 for ; Wed, 14 Jun 2023 06:45:45 -0700 (PDT) Received: from aurora48.sdinet.de (aurora48.sdinet.de [193.103.159.48]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (Client did not present a certificate) (Authenticated sender: haegar) by mail.sdinet.de (bofa-smtpd) with ESMTPSA id 05EBE34034B; Wed, 14 Jun 2023 15:44:49 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=sdinet.de; s=mail; t=1686750289; bh=cqI6kYniynqv2aekEIshJYC4NhMe2RLMnPA7QqMC0F8=; l=1041; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=jzYq3HEJNOsS5pBd81eaIv3yWYB8ihOcwqbipHrK8oI0VtckWYj5lfmzya+TIIx+d eUBU+na81KNiDI6M6YDh4m7nv2X7noxQbaOnA05Ik3gZo6xpcTgGTlbV36Kc1E5G1R EybWuPW+8IowVJKgUBfxod2pOzH1Ed8fXPVGodOp1nqXQtz04QqTg7BKNSpT6vRxzG jZJfqALeO0aOPV3hjjx44OhcI5f6R6ugLwoXGtGREai/9FiVKdhZ5JLBx/BYkMM+Ji dJXfuKodFBnIScd9lPNO8xCSLQhajm5Yv4pqIZMMEHj+zbuJxcL5cn4INe4Un64nb2 FapLvhO8KTl4A== Date: Wed, 14 Jun 2023 15:45:41 +0200 (CEST) From: Sven-Haegar Koch To: Luiz Capitulino cc: Sebastian Andrzej Siewior , "gregkh@linuxfoundation.org" , "Bhatnagar, Rishabh" , "linux-kernel@vger.kernel.org" , "tglx@linutronix.de" , "sashal@kernel.org" , abuehaze@amazon.com, "stable@vger.kernel.org" Subject: Re: Observing RCU stalls in kernel 5.4/5.10/5.15/6.1 stable trees In-Reply-To: <4c4178a1-1050-ced4-e6fb-f95c3bdefc98@amazon.com> Message-ID: <2a3fa097-8ba0-5b0e-f506-779fee5b8fef@sdinet.de> References: <12c6f9a3-d087-b824-0d05-0d18c9bc1bf3@amazon.com> <2023061428-compacter-economic-b648@gregkh> <20230614092045.tNY8USjq@linutronix.de> <4c4178a1-1050-ced4-e6fb-f95c3bdefc98@amazon.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 14 Jun 2023, Luiz Capitulino wrote: > On 2023-06-14 05:20, Sebastian Andrzej Siewior wrote: > > > On 2023-06-14 11:14:49 [+0200], gregkh@linuxfoundation.org wrote: > > > Oops, missed this. > > > > > > Yes, there might be, can you do 'git bisect' and track down the patch > > > that fixed this? > > > > There was a report of a lockup during boot in VMs yesterday. If I > > remember correctly this still exists and might be related to this > > report. I'm going to have a look. > > Thanks, Sebastian. Do you have a link for the discussion? May be this, talking about the same commit as cause as this thread: Subject: Re: [PATCH] timekeeping: Align tick_sched_timer() with the HZ tick. -- regression report https://lore.kernel.org/lkml/5a56290d-806e-b9a5-f37c-f21958b5a8c0@grsecurity.net/ May not have been the best idea to respond with such big analysis to a 3 months old dead thread, gets lost extremely easy. c'ya sven-haegar -- Three may keep a secret, if two of them are dead. - Ben F.