From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Jiri Slaby <jslaby@suse.cz>
Cc: Miroslav Benes <mbenes@suse.cz>, Jiri Kosina <jikos@kernel.org>,
Jessica Yu <jeyu@redhat.com>,
linux-kernel@vger.kernel.org, live-patching@vger.kernel.org,
Vojtech Pavlik <vojtech@suse.com>
Subject: Re: [RFC PATCH v1.9 07/14] x86/stacktrace: add function for detecting reliable stack traces
Date: Mon, 13 Jun 2016 16:58:55 -0500 [thread overview]
Message-ID: <20160613215855.66xvswctxdy2bbrj@treble> (raw)
In-Reply-To: <91e1f8fc-1a97-709c-3846-16b9ce694246@suse.cz>
On Thu, Jun 09, 2016 at 10:31:01AM +0200, Jiri Slaby wrote:
> On 04/12/2016, 05:56 PM, Josh Poimboeuf wrote:
> >> We had been using unwinder for over a decade in SUSE but it stopped
> >> working for assembly recently (for obvious reasons). So having a working
> >> and reliable unwinder again is one of the top priorities for us.
> >
> > Since you already have an unwinder in SUSE, it sounds like what you need
> > most urgently is DWARF generation support in objtool so that your
> > unwinder will work again for asm code, right? The kernel already emits
> > DWARF today (for C code), so an upstream unwinder isn't needed first.
>
> Right, that's exact.
>
> > That's high on my TODO list, and the coding is probably 70-80% done. I
> > don't want to hold up progress... But I don't really feel comfortable
> > passing the code off because it's quite a big feature with some major
> > changes to objtool. Being the objtool author, I want to make sure to
> > give it my full attention.
>
> Sure. There is going to be no pressure to merge the v1 of the changes.
> But it would be nice to see what you have now so that we can start
> reviewing and proposing patches on the top of what you have :).
The code is still quite a mess and doesn't even work yet. I think it
would be counterproductive for everybody if I were to share it at this
stage.
> > I'm spread quite thin at the moment but I do hope to have v1 of those
> > patches soon, hopefully May-ish.
>
> So I hope we will see something we can start working on now. I can
> really dedicate one-man hours to that work.
I do appreciate your offer to help. Hopefully soon I'll get it to at
least a decently working and halfway readable state, and then I'll post
it. Then any help will be much appreciated.
--
Josh
next prev parent reply other threads:[~2016-06-13 21:58 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-25 19:34 [RFC PATCH v1.9 00/14] livepatch: hybrid consistency model Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 01/14] x86/asm/head: cleanup initial stack variable Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 02/14] x86/asm/head: use a common function for starting CPUs Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 03/14] x86/asm/head: standardize the bottom of the stack for idle tasks Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 04/14] x86: move _stext marker before head code Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 05/14] sched: horrible way to detect whether a task has been preempted Josh Poimboeuf
2016-04-06 13:06 ` Petr Mladek
2016-04-06 16:33 ` Josh Poimboeuf
2016-04-07 9:47 ` Petr Mladek
2016-04-07 14:34 ` Josh Poimboeuf
2016-04-08 8:07 ` Petr Mladek
2016-04-08 14:34 ` Josh Poimboeuf
2016-04-07 21:15 ` Jessica Yu
2016-04-07 21:37 ` Jiri Kosina
2016-04-07 22:35 ` Josh Poimboeuf
2016-04-07 22:53 ` Jiri Kosina
2016-04-07 23:15 ` Jessica Yu
2016-04-08 7:05 ` Jiri Kosina
2016-04-08 8:03 ` Petr Mladek
2016-04-08 14:31 ` Josh Poimboeuf
2016-04-11 8:38 ` Petr Mladek
2016-03-25 19:34 ` [RFC PATCH v1.9 06/14] x86: add error handling to dump_trace() Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 07/14] x86/stacktrace: add function for detecting reliable stack traces Josh Poimboeuf
2016-03-31 13:03 ` Miroslav Benes
2016-04-04 17:54 ` Josh Poimboeuf
2016-04-11 14:16 ` Jiri Slaby
2016-04-12 15:56 ` Josh Poimboeuf
2016-06-09 8:31 ` Jiri Slaby
2016-06-13 21:58 ` Josh Poimboeuf [this message]
2016-12-01 20:28 ` Jiri Slaby
2016-12-01 20:59 ` Josh Poimboeuf
2017-01-17 13:08 ` Jiri Slaby
2016-04-04 15:55 ` Petr Mladek
2016-04-04 17:58 ` Josh Poimboeuf
2016-04-07 11:55 ` Petr Mladek
2016-04-07 14:46 ` Josh Poimboeuf
2016-04-08 8:24 ` Petr Mladek
2016-04-11 3:29 ` Jessica Yu
2016-03-25 19:34 ` [RFC PATCH v1.9 08/14] livepatch: separate enabled and patched states Josh Poimboeuf
2016-04-11 3:31 ` Jessica Yu
2016-04-12 14:44 ` [RFC PATCH v1.9 08/14] " Chris J Arges
2016-04-12 17:16 ` Josh Poimboeuf
2016-04-12 17:35 ` Chris J Arges
2016-04-12 18:25 ` Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 09/14] livepatch: remove unnecessary object loaded check Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 10/14] livepatch: move patching functions into patch.c Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 11/14] livepatch: store function sizes Josh Poimboeuf
2016-03-25 19:34 ` [RFC PATCH v1.9 12/14] livepatch: create per-task consistency model Josh Poimboeuf
2016-03-31 13:12 ` Miroslav Benes
2016-04-04 18:21 ` Josh Poimboeuf
2016-04-04 18:27 ` Vojtech Pavlik
2016-04-04 18:33 ` Josh Poimboeuf
2016-04-05 11:36 ` Vojtech Pavlik
2016-04-05 13:53 ` Josh Poimboeuf
2016-04-05 17:32 ` Minfei Huang
2016-04-05 21:17 ` Josh Poimboeuf
2016-04-14 9:25 ` Miroslav Benes
2016-04-14 16:39 ` Josh Poimboeuf
2016-04-15 9:17 ` Miroslav Benes
2016-03-25 19:35 ` [RFC PATCH v1.9 13/14] livepatch: add /proc/<pid>/patch_status Josh Poimboeuf
2016-03-31 9:33 ` Jiri Slaby
2016-03-31 9:40 ` Jiri Slaby
2016-04-04 16:56 ` Josh Poimboeuf
2016-03-25 19:35 ` [RFC PATCH v1.9 14/14] livepatch: update task universe when exiting kernel Josh Poimboeuf
2016-04-14 8:47 ` Miroslav Benes
2016-04-14 8:50 ` Miroslav Benes
2016-04-14 13:39 ` Josh Poimboeuf
2016-04-18 15:01 ` [RFC PATCH 0/2] s390/klp: s390 support Miroslav Benes
2016-04-18 15:01 ` [RFC PATCH 1/2] s390: livepatch, reorganize TIF bits Miroslav Benes
2016-04-18 15:01 ` [RFC PATCH 2/2] s390/klp: update task universe when exiting kernel Miroslav Benes
2016-04-18 15:17 ` [RFC PATCH 0/2] s390/klp: s390 support Josh Poimboeuf
2016-04-14 13:23 ` [RFC PATCH v1.9 14/14] livepatch: update task universe when exiting kernel Josh Poimboeuf
2016-03-31 12:54 ` [RFC PATCH v1.9 00/14] livepatch: hybrid consistency model Miroslav Benes
2016-04-04 17:03 ` Josh Poimboeuf
2016-04-05 14:24 ` Miroslav Benes
2016-04-05 14:34 ` Josh Poimboeuf
2016-04-05 14:53 ` Miroslav Benes
2016-04-01 13:34 ` Miroslav Benes
2016-04-01 13:39 ` Petr Mladek
2016-04-01 15:38 ` Petr Mladek
2016-04-05 13:44 ` Josh Poimboeuf
2016-04-06 8:15 ` Petr Mladek
2016-04-28 18:53 ` Josh Poimboeuf
2016-06-09 14:20 ` Petr Mladek
2016-04-07 12:10 ` Petr Mladek
2016-04-07 15:08 ` Josh Poimboeuf
2016-04-07 15:47 ` Jiri Kosina
2016-04-07 18:03 ` Josh Poimboeuf
2016-04-07 18:33 ` Jiri Kosina
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