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[2620:137:e000::1:20]) by mx.google.com with ESMTP id l9-20020a056a0016c900b004c5d194b2c6si3662823pfc.282.2022.02.25.18.21.17; Fri, 25 Feb 2022 18:21:32 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=MgkfcBYC; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229567AbiBZCVi (ORCPT + 99 others); Fri, 25 Feb 2022 21:21:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54290 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229447AbiBZCVh (ORCPT ); Fri, 25 Feb 2022 21:21:37 -0500 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BBABC46143 for ; Fri, 25 Feb 2022 18:21:03 -0800 (PST) Received: by mail-pj1-x1029.google.com with SMTP id j10-20020a17090a94ca00b001bc2a9596f6so6439328pjw.5 for ; Fri, 25 Feb 2022 18:21:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=LVx2Sgx3Uey6cinUD9sMnwcdDXIpFfi7NKSddzh5F5A=; b=MgkfcBYC2hgXx9X2CcsC3AnyJCiXla5DlZjhJPNL9EIkNyKPSAhhMO0be+kj/jDlG5 Uh+b7nKBtrpyJb59vWf5PDdHVIi9+pd0LyF9WFzXz/yNLyRnxMPaSl2SX2I58gReEoXB ix+qsN35XrbmzMQQykYmvkSRqynUto0im0Gy8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=LVx2Sgx3Uey6cinUD9sMnwcdDXIpFfi7NKSddzh5F5A=; b=0Gwf8dm//YtyBkS6hNGGLGLDV0kG/dtUZT3x2W9LFhTIUgyAm1Bq/YjiPThlxLDVv1 3/8tb4W9sz2SndnlY0yp+O4OIV7sd5DTx3RQ56WT3nLhjxnrLhnpeUPZkWIhSP6OVWqy DkjgkQtIZrGtAYyXUe6FTrSqY021dQFKStuNZGiX7TxS3CG5TKZfuvns+jo+O0tUP/iJ c5EqHgHpbF3kkufyzl2qV8k4D26Cmah7f7T4Yd4l86ZAzbUV1Dw3gR9aG8jVNDmxkeVN k3zDjWsVRCDtKwFUuZlM5wTH6RW4dobZf5wmu74itlzBZWfNnvP9iNf9Vkp1x+33ZnR/ WrtQ== X-Gm-Message-State: AOAM532dKPWD61VvJ093km4xs3qPlhuOWyQr/1HplxD75Rc3pGyRvURP NjHd4i4QVphhNPpqN9hncqWmdQ== X-Received: by 2002:a17:902:694c:b0:14f:bb61:e7bf with SMTP id k12-20020a170902694c00b0014fbb61e7bfmr9733187plt.159.1645842063293; Fri, 25 Feb 2022 18:21:03 -0800 (PST) Received: from google.com ([240f:75:7537:3187:d7ef:f0a2:708b:c03e]) by smtp.gmail.com with ESMTPSA id w17-20020a056a0014d100b004f1063290basm4776269pfu.15.2022.02.25.18.20.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Feb 2022 18:21:02 -0800 (PST) Date: Sat, 26 Feb 2022 02:20:57 +0000 From: Sergey Senozhatsky To: Steven Rostedt Cc: Sergey Senozhatsky , LKML , Petr Mladek , John Ogness , Greg Kroah-Hartman , Wander Lairson Costa , Willy Tarreau , David Laight Subject: Re: Strange output on the console Message-ID: References: <20220224230035.36547137@gandalf.local.home> <20220225083209.24bafe2c@gandalf.local.home> <20220225084256.071dcf82@gandalf.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220225084256.071dcf82@gandalf.local.home> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (22/02/25 08:42), Steven Rostedt wrote: > On Fri, 25 Feb 2022 08:32:09 -0500 > Steven Rostedt wrote: > > > On Fri, 25 Feb 2022 14:07:00 +0900 > > Sergey Senozhatsky wrote: > > > > > > Steven, did you notice this recently? > > > > May I perhaps suggest git bisect? (sorry) > > > > > > On the off chance - do you have this revert in your kernel? > > > > > > commit 6a7b9f002eca6788d346c16a6ff0c218b41f8d1d > > > Author: Greg Kroah-Hartman > > > Date: Wed Jan 26 14:33:58 2022 +0100 > > > > > > Revert "tty: serial: Use fifo in 8250 console driver" > > > > > > This reverts commit 5021d709b31b8a14317998a33cbc78be0de9ab30. > > > > > > The patch is still a bit buggy, and this breaks some other hardware > > > types. It needs to be resubmitted in a non-buggy way, and make sure the > > > other hardware types also continue to work properly. > > > > My tree does not have this. > > > > I just applied it and I'm building now. I'll let you know if this fixes the > > issue or not. > > Mystery solved. Thanks Sergey! Awesome!