From: peter enderborg <peter.enderborg@sony.com>
To: Stephen Boyd <swboyd@chromium.org>,
Andrew Morton <akpm@linux-foundation.org>
Cc: <linux-kernel@vger.kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Baoquan He <bhe@redhat.com>, Borislav Petkov <bp@alien8.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Dave Young <dyoung@redhat.com>, Evan Green <evgreen@chromium.org>,
Hsin-Yi Wang <hsinyi@chromium.org>,
Ingo Molnar <mingo@redhat.com>, Jessica Yu <jeyu@kernel.org>,
Jiri Olsa <jolsa@kernel.org>, <kexec@lists.infradead.org>,
Konstantin Khlebnikov <khlebnikov@yandex-team.ru>,
<linux-arm-kernel@lists.infradead.org>,
<linux-doc@vger.kernel.org>, Matthew Wilcox <willy@infradead.org>,
Petr Mladek <pmladek@suse.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Sasha Levin <sashal@kernel.org>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Thomas Gleixner <tglx@linutronix.de>,
Vivek Goyal <vgoyal@redhat.com>, Will Deacon <will@kernel.org>,
<x86@kernel.org>
Subject: Re: [PATCH v2 00/12] Add build ID to stacktraces
Date: Thu, 25 Mar 2021 12:14:31 +0100 [thread overview]
Message-ID: <a7a5e6b4-109b-fdf6-5d72-1d8675a2b1ae@sony.com> (raw)
In-Reply-To: <20210324020443.1815557-1-swboyd@chromium.org>
On 3/24/21 3:04 AM, Stephen Boyd wrote:
> 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.
>
> This also includes some patches to make the buildid.c file use more
> const arguments and consolidate logic into buildid.c from kdump. These
> are left to the end as they were mostly cleanup patches. I don't know
> who exactly maintains this so I guess Andrew is the best option to merge
> all this code.
>
> 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)
> pstate: 00400009 (nzcv daif +PAN -UAO -TCO BTYPE=--)
> pc : lkdtm_WARNING+0x28/0x30 [lkdtm]
> lr : lkdtm_do_action+0x24/0x40 [lkdtm]
> sp : ffffffc0134fbca0
> x29: ffffffc0134fbca0 x28: ffffff92d53ba240
> x27: 0000000000000000 x26: 0000000000000000
> x25: 0000000000000000 x24: ffffffe3622352c0
> x23: 0000000000000020 x22: ffffffe362233366
> x21: ffffffe3622352e0 x20: ffffffc0134fbde0
> x19: 0000000000000008 x18: 0000000000000000
> x17: ffffff929b6536fc x16: 0000000000000000
> x15: 0000000000000000 x14: 0000000000000012
> x13: ffffffe380ed892c x12: ffffffe381d05068
> x11: 0000000000000000 x10: 0000000000000000
> x9 : 0000000000000001 x8 : ffffffe362237000
> x7 : aaaaaaaaaaaaaaaa x6 : 0000000000000000
> x5 : 0000000000000000 x4 : 0000000000000001
> x3 : 0000000000000008 x2 : ffffff93fef25a70
> x1 : ffffff93fef15788 x0 : ffffffe3622352e0
> Call trace:
> lkdtm_WARNING+0x28/0x30 [lkdtm ed5019fdf5e53be37cb1ba7899292d7e143b259e]
> direct_entry+0x16c/0x1b4 [lkdtm ed5019fdf5e53be37cb1ba7899292d7e143b259e]
> full_proxy_write+0x74/0xa4
> vfs_write+0xec/0x2e8
> ksys_write+0x84/0xf0
> __arm64_sys_write+0x24/0x30
> el0_svc_common+0xf4/0x1c0
> do_el0_svc_compat+0x28/0x3c
> el0_svc_compat+0x10/0x1c
> el0_sync_compat_handler+0xa8/0xcc
> el0_sync_compat+0x178/0x180
> ---[ end trace 3d95032303e59e68 ]---
How will this work with the ftrace?
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next prev parent reply other threads:[~2021-03-25 11:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-24 2:04 [PATCH v2 00/12] Add build ID to stacktraces Stephen Boyd
2021-03-24 2:04 ` [PATCH v2 05/12] arm64: stacktrace: Use %pSb for backtrace printing Stephen Boyd
2021-03-24 8:55 ` [PATCH v2 00/12] Add build ID to stacktraces Christoph Hellwig
2021-03-25 11:06 ` peter enderborg
2021-03-25 23:21 ` Stephen Boyd
2021-03-30 10:59 ` Petr Mladek
[not found] ` <32011616573677@mail.yandex-team.ru>
2021-03-24 19:04 ` Stephen Boyd
2021-03-25 11:14 ` peter enderborg [this message]
2021-03-25 23:18 ` Stephen Boyd
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