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 93A12EB64D8 for ; Wed, 14 Jun 2023 15:23:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343739AbjFNPXf (ORCPT ); Wed, 14 Jun 2023 11:23:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60770 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235089AbjFNPXd (ORCPT ); Wed, 14 Jun 2023 11:23:33 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C59A11B for ; Wed, 14 Jun 2023 08:22:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1686756166; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=vZh2p9vXZ9e46XeeWLcrDNXcBuLVV71Q2XCdEow9ONs=; b=aJgFSP6Ro37g/QylLeaPOXrIi0aeKe9lQ+IvuH+uQfvSUuVCbMVfkpPFfO2/Byf342zYwg hgMCllVHTuBz0CKVfpk9uOCv5vMzMNvw2NLZ/hemX84/BidtEVdRLLrNb9k3z7eeU4H9zK 2lfGIQYUfB2HTP3E5YuJJxRRXDO1ZFY= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-516-Fg6rM2VWM7ielz5q-en8oQ-1; Wed, 14 Jun 2023 11:22:44 -0400 X-MC-Unique: Fg6rM2VWM7ielz5q-en8oQ-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 24B17185A7B2; Wed, 14 Jun 2023 15:22:40 +0000 (UTC) Received: from localhost (unknown [10.39.192.206]) by smtp.corp.redhat.com (Postfix) with ESMTP id DF15AC1603B; Wed, 14 Jun 2023 15:22:39 +0000 (UTC) Date: Wed, 14 Jun 2023 16:22:39 +0100 From: "Richard W.M. Jones" To: Peter Zijlstra Cc: Aaron Thompson , linux-kernel@vger.kernel.org Subject: Re: printk.time causes rare kernel boot hangs Message-ID: <20230614152239.GH7636@redhat.com> References: <20230614094522.GA7636@redhat.com> <20230614103011.GL7912@redhat.com> <20230614103953.GM7912@redhat.com> <20230614113536.GJ1639749@hirez.programming.kicks-ass.net> <20230614125320.GA1640563@hirez.programming.kicks-ass.net> <20230614130348.GF7636@redhat.com> <20230614130945.GK1639749@hirez.programming.kicks-ass.net> <20230614145348.GB1640563@hirez.programming.kicks-ass.net> <20230614150717.GG7636@redhat.com> <20230614151920.GN1639749@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230614151920.GN1639749@hirez.programming.kicks-ass.net> User-Agent: Mutt/1.5.21 (2010-09-15) X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 14, 2023 at 05:19:20PM +0200, Peter Zijlstra wrote: > On Wed, Jun 14, 2023 at 04:07:17PM +0100, Richard W.M. Jones wrote: > > On Wed, Jun 14, 2023 at 04:53:48PM +0200, Peter Zijlstra wrote: > > > > Clearly I'm doing something wrong. > > > > I'm suspecting version of qemu may have something to do with it, but > > honestly I don't know. Which qemu are you using? > > ivb-ep: QEMU emulator version 7.2.0 (Debian 1:7.2+dfsg-3) > adl: QEMU emulator version 7.2.0 (Debian 1:7.2+dfsg-1+b2) We had a report that it occurred on qemu 7.0: https://bugzilla.redhat.com/show_bug.cgi?id=2213346#c5 I didn't try qemu 7.2, but I've been using 8.0 in my tests. I'm now trying (on Intel again) with qemu @ 7efd65423ab22e6f5890, the latest version as of now. > I'll try and upgrade the adl to 8. Thanks, Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 100 libraries supported. http://fedoraproject.org/wiki/MinGW