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[209.132.180.67]) by mx.google.com with ESMTP id h17si8229383edq.86.2019.09.10.11.46.55; Tue, 10 Sep 2019 11:47:19 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=vdHrkPqj; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389758AbfIJDTO (ORCPT + 99 others); Mon, 9 Sep 2019 23:19:14 -0400 Received: from mail-pf1-f193.google.com ([209.85.210.193]:39278 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726704AbfIJDTO (ORCPT ); Mon, 9 Sep 2019 23:19:14 -0400 Received: by mail-pf1-f193.google.com with SMTP id i1so1805826pfa.6 for ; Mon, 09 Sep 2019 20:19:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=o7+s5dHDsNMT31sW4MR0WrezJccEAL/e3o6mXDjKbYE=; b=vdHrkPqj6RvDVimyUnRVQht0b2m6XUHPQnG6QtxuiOF+WhFiQAnylgGmn/vyknaf91 Q22ToDqa7veciSm/797X6KK3/rwqA9n0nNfgfm7q6EJPhYRUTStSKfc3ocWpQmrgP38c Vd+HWWdvmFJgXsww/JE2ogu506vROfVHAbhytkIYUYOw+4QeJq3WQKVzpsmv3hguNmwz dr4nAUsFBByntM5XhP6zyn4oHbcp0gNZO4CKabwHGP0cYwubJIvL9driwje407MznQhH MYwD8LgXBrHUS+GZdGrY5x/0FLKYe1EG/sPJRI8HRSG7f0voD9SKs09hl9ePHHfDa9q6 dHZw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=o7+s5dHDsNMT31sW4MR0WrezJccEAL/e3o6mXDjKbYE=; b=fZazmBjaUBMi4chrTeCaEEM8LjvDtwprOgZxyBVf1ywGq1BCdTj5bxf43lMue2a4Ac njJpD85yp75MSiNEUHCFF2PhhQOU7vGTGo4pJ9lC6nLroofgmX9vO2TyL+XvqkXogGmS 9wyWyf0tGFcAjlINOyZ59tjGPMGJyrqXF4HkGeAPwZ4/zvU1D14JCzGsqPFkOlBo59aH TtHWcS3/dPbSpi7CSN4b/Jhs8Wifj6usbUCVbLTti7JCN0c88+iuu3elK+VWgk3Qa5JF L4FINrmTOyICxReDYSWIC8oaTmQgGW4uriu1b0m1MVjspMqdHvgVAiX+ERmqy5vEaoS4 nL5w== X-Gm-Message-State: APjAAAUINzPKwjIc1ejzEE7baXhjo7fBkcjlRy6IYcFbVmHGEay/G/cl 4a+pDCty/sDGyDf5eUwFQYM= X-Received: by 2002:a63:20a:: with SMTP id 10mr25051127pgc.226.1568085553732; Mon, 09 Sep 2019 20:19:13 -0700 (PDT) Received: from localhost ([39.7.19.227]) by smtp.gmail.com with ESMTPSA id u11sm8886674pfm.113.2019.09.09.20.19.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Sep 2019 20:19:12 -0700 (PDT) Date: Tue, 10 Sep 2019 12:19:08 +0900 From: Sergey Senozhatsky To: Thomas Gleixner Cc: Linus Torvalds , Peter Zijlstra , John Ogness , Linux List Kernel Mailing , Petr Mladek , Sergey Senozhatsky , Steven Rostedt , Greg Kroah-Hartman , Andrea Parri , Sergey Senozhatsky , Brendan Higgins Subject: Re: [RFC PATCH v4 9/9] printk: use a new ringbuffer implementation Message-ID: <20190910031908.GA103966@jagdpanzerIV> References: <20190807222634.1723-1-john.ogness@linutronix.de> <20190807222634.1723-10-john.ogness@linutronix.de> <20190809061437.GE2332@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (08/10/19 07:53), Thomas Gleixner wrote: > > Right now we have an implementation for serial only, but that already is > useful. I nicely got (minimaly garbled) crash dumps out of an NMI > handler. With the current mainline console code the machine just hung. > Thomas, any chance you can post backtraces? Just curious where exactly current printk() and console_drivers() hung. -ss