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From: Peter Zijlstra <peterz@infradead.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@kernel.org>, "H . Peter Anvin" <hpa@zytor.com>,
	the arch/x86 maintainers <x86@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Andy Lutomirski <luto@amacapital.net>,
	Steven Rostedt <rostedt@goodmis.org>,
	Brian Gerst <brgerst@gmail.com>,
	Kees Cook <keescook@chromium.org>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Byungchul Park <byungchul.park@lge.com>,
	Nilay Vaish <nilayvaish@gmail.com>
Subject: Re: [PATCH 3/6] x86/dumpstack: make printk_stack_address() more generally useful
Date: Wed, 24 Aug 2016 20:22:20 +0200	[thread overview]
Message-ID: <20160824182220.GB10153@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CA+55aFyaLgbocKa4Ec1J4Z12p4-N66MQGOj-HLaxP8RSW8NOrw@mail.gmail.com>

On Wed, Aug 24, 2016 at 02:03:58PM -0400, Linus Torvalds wrote:

> 
> For the non-kallsyms case we _could_ also just make the '%pB' format
> add the [<>] markers back in case somebody still uses the user-space
> kallsyms script that looks up hex numbers.
> 
> Right now the hex numbers are not only useless in stack dumps (since
> you can't look up symbols using them anyway thanks to randomization),
> they are noise that makes the stack traces harder to read. So let's
> just remove them?

I actively disable KASLR on my dev box and feed these hex numbers into
addr2line -ie vmlinux to find where in the function we are.

Having the option to make %pB generate them works for me.

  reply	other threads:[~2016-08-24 18:49 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-24 16:50 [PATCH 0/6] x86/dumpstack: more stack dump improvements Josh Poimboeuf
2016-08-24 16:50 ` [PATCH 1/6] perf/x86: check perf_callchain_store() error Josh Poimboeuf
2016-09-08  9:48   ` [tip:x86/asm] perf/x86: Check " tip-bot for Josh Poimboeuf
2016-08-24 16:50 ` [PATCH 2/6] oprofile/x86: add regs->ip to oprofile trace Josh Poimboeuf
2016-08-30 11:30   ` Robert Richter
2016-09-08  9:48   ` [tip:x86/asm] oprofile/x86: Add " tip-bot for Josh Poimboeuf
2016-08-24 16:50 ` [PATCH 3/6] x86/dumpstack: make printk_stack_address() more generally useful Josh Poimboeuf
2016-08-24 17:28   ` Joe Perches
2016-08-24 18:43     ` Josh Poimboeuf
2016-08-24 19:07       ` Joe Perches
2016-08-24 19:24         ` Josh Poimboeuf
2016-08-24 19:57           ` Joe Perches
2016-08-24 18:03   ` Linus Torvalds
2016-08-24 18:22     ` Peter Zijlstra [this message]
2016-08-24 18:37       ` Linus Torvalds
2016-08-24 19:37         ` Josh Poimboeuf
2016-08-25 17:49           ` Josh Poimboeuf
2016-08-25 20:41             ` Kees Cook
2016-08-25 21:07               ` Josh Poimboeuf
     [not found]                 ` <CA+55aFy3sgA4=ZPhiDWiRMvWj9QPhUd0JBdUr1hm_6G0aSC6uw@mail.gmail.com>
2016-08-26  2:19                   ` Kees Cook
2016-08-26  3:19                   ` Josh Poimboeuf
2016-08-26  4:40                     ` Linus Torvalds
2016-08-26  5:56                       ` Josh Poimboeuf
     [not found]                         ` <CA+55aFy8FPRiEr-4p++TGj+keTNsg781q1E1FQZ7z4+nAs0ZaQ@mail.gmail.com>
2016-08-26 13:30                           ` Josh Poimboeuf
2016-08-31 16:53         ` Josh Poimboeuf
2016-08-31 17:15           ` Linus Torvalds
2016-09-01 13:09             ` Josh Poimboeuf
2016-09-01 16:30               ` Linus Torvalds
2016-09-08  9:49   ` [tip:x86/asm] x86/dumpstack: Make " tip-bot for Josh Poimboeuf
2016-08-24 16:50 ` [PATCH 4/6] x86/dumpstack: add get_stack_pointer() and get_frame_pointer() Josh Poimboeuf
2016-09-08  9:49   ` [tip:x86/asm] x86/dumpstack: Add " tip-bot for Josh Poimboeuf
2016-08-24 16:50 ` [PATCH 5/6] x86/dumpstack: remove unnecessary stack pointer arguments Josh Poimboeuf
2016-09-08  9:50   ` [tip:x86/asm] x86/dumpstack: Remove " tip-bot for Josh Poimboeuf
2016-08-24 16:50 ` [PATCH 6/6] x86/dumpstack: allow preemption in show_stack_log_lvl() and dump_trace() Josh Poimboeuf
2016-09-08  7:04   ` Ingo Molnar
2016-09-08 21:47     ` Josh Poimboeuf
2016-09-08 21:49       ` [PATCH v2] " Josh Poimboeuf
2016-09-13 18:29         ` Ingo Molnar
2016-09-13 19:38           ` Josh Poimboeuf
2016-09-14 17:39         ` [tip:x86/asm] x86/dumpstack: Allow " tip-bot for Josh Poimboeuf
2016-09-09  6:11       ` [PATCH 6/6] x86/dumpstack: allow " Ingo Molnar
2016-09-01 13:13 ` [PATCH 0/6] x86/dumpstack: more stack dump improvements Josh Poimboeuf

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