From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lgRcW-009Zin-5W for kexec@lists.infradead.org; Tue, 11 May 2021 12:36:18 +0000 From: David Laight Subject: RE: [PATCH v6 00/13] Add build ID to stacktraces Date: Tue, 11 May 2021 12:36:06 +0000 Message-ID: References: <20210511003845.2429846-1-swboyd@chromium.org> In-Reply-To: <20210511003845.2429846-1-swboyd@chromium.org> MIME-Version: 1.0 Content-Language: en-US List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: 'Stephen Boyd' , Andrew Morton , Petr Mladek Cc: "linux-kernel@vger.kernel.org" , Alexei Starovoitov , Andy Shevchenko , Baoquan He , Borislav Petkov , Catalin Marinas , Dave Young , Evan Green , Hsin-Yi Wang , Ingo Molnar , Jessica Yu , Jiri Olsa , "kexec@lists.infradead.org" , Konstantin Khlebnikov , "linux-arm-kernel@lists.infradead.org" , "linux-doc@vger.kernel.org" , Matthew Wilcox , Rasmus Villemoes , Sasha Levin , Sergey Senozhatsky , Steven Rostedt , Thomas Gleixner , Vivek Goyal , Will Deacon , "x86@kernel.org" , Christoph Hellwig , peter enderborg From: Stephen Boyd > Sent: 11 May 2021 01:39 > > This series adds the kernel's build ID[1] to the stacktrace header > printed in oops messages, warnings, etc. and the build ID for any module > that appears in the stacktrace after the module name. The goal is to > make the stacktrace more self-contained and descriptive by including the > relevant build IDs in the kernel logs when something goes wrong. This > can be used by post processing tools like script/decode_stacktrace.sh > and kernel developers to easily locate the debug info associated with a > kernel crash and line up what line and file things started falling apart > at. > > To show how this can be used I've included a patch to > decode_stacktrace.sh that downloads the debuginfo from a debuginfod > server. ... > Here's an example lkdtm stacktrace on arm64. > > WARNING: CPU: 4 PID: 3255 at drivers/misc/lkdtm/bugs.c:83 lkdtm_WARNING+0x28/0x30 [lkdtm] > Modules linked in: lkdtm rfcomm algif_hash algif_skcipher af_alg xt_cgroup uinput xt_MASQUERADE > CPU: 4 PID: 3255 Comm: bash Not tainted 5.11 #3 aa23f7a1231c229de205662d5a9e0d4c580f19a1 > Hardware name: Google Lazor (rev3+) with KB Backlight (DT) ... > x1 : ffffff93fef15788 x0 : ffffffe3622352e0 > Call trace: > lkdtm_WARNING+0x28/0x30 [lkdtm ed5019fdf5e53be37cb1ba7899292d7e143b259e] > direct_entry+0x16c/0x1b4 [lkdtm ed5019fdf5e53be37cb1ba7899292d7e143b259e] > full_proxy_write+0x74/0xa4 Is there any way to get it to print each module ID only once? David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales) _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec