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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_MUTT autolearn=ham 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 50D05C43613 for ; Fri, 21 Jun 2019 12:29:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 279D92083B for ; Fri, 21 Jun 2019 12:29:36 +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="ZF4pc1R7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726533AbfFUM3e (ORCPT ); Fri, 21 Jun 2019 08:29:34 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:59702 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726229AbfFUM3e (ORCPT ); Fri, 21 Jun 2019 08:29:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=JtzNg/W/9Z6R95MFKLpT3RlW96vhlKcRykI0P3sQui0=; b=ZF4pc1R7fl8qHacYV1cu3GmxH XPxWGMaPLa9b+5Gjos6wyI+1XXE4oNWt9RtlIy123V7hm0dkm8subteupi4VU5+1SrBGDROPOv7b/ PsA6S0xmnJ4HsscJjuMXCDISBjcQzDl/hGeICkQKKk/UUQEHfYN4ZmX6vpGsJDsGjI5qfX9fH9UFa 5n7Nmkx5U1vi31FK/OzKsiUrdh5Q7wu4r4wmwHwRX6s5WCPrB89BcV03x3FfCsn3/9jAXHqsOh88M 0LhWFQeaZdDutUTqN5H/Kick7DzDx9Sk/MKUpBk/YOGS/TdsygR/y3aBJuFvhZidGQb/pmH+0C7q2 CRcSE2ccg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1heIfZ-0001vZ-SZ; Fri, 21 Jun 2019 12:29:30 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id E4365203C694A; Fri, 21 Jun 2019 14:29:27 +0200 (CEST) Date: Fri, 21 Jun 2019 14:29:27 +0200 From: Peter Zijlstra To: "Paul E. McKenney" Cc: linux-kernel@vger.kernel.org, mingo@redhat.com, frederic@kernel.org, tglx@linutronix.de Subject: Re: [PATCH] time/tick-broadcast: Fix tick_broadcast_offline() lockdep complaint Message-ID: <20190621122927.GV3402@hirez.programming.kicks-ass.net> References: <20190619181903.GA14233@linux.ibm.com> <20190620121032.GU3436@hirez.programming.kicks-ass.net> <20190620160118.GQ26519@linux.ibm.com> <20190620211019.GA3436@hirez.programming.kicks-ass.net> <20190620221336.GZ26519@linux.ibm.com> <20190621105503.GI3436@hirez.programming.kicks-ass.net> <20190621121630.GE26519@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190621121630.GE26519@linux.ibm.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 21, 2019 at 05:16:30AM -0700, Paul E. McKenney wrote: > A pair of full hangs at boot (TASKS03 and TREE04), no console output > whatsoever. Not sure how these changes could cause that, but suspicion > falls on sched_tick_offload_init(). Though even that is a bit strange > because if so, why didn't TREE01 and TREE07 also hang? Again, looking > into it. Pesky details ;-)