On Thu, Oct 08, 2015 at 07:01:37PM +0900, AKASHI Takahiro wrote:

This is the third patch series for fixing stack tracer on arm64.
The original issue was reported by Jungseok[1], and then I found more
issues[2].
(Steven, Jungseok, sorry for not replying to your comments directly.)

I address here all the issues and implement fixes described in [2] except
for interrupt-triggered problems, ie. II-3). Recent discussions[3] about
introducing a dedicated interrupt stack suggests that we may avoid walking
through from an interrupt stack to a process stack.
(So interrupt-stack patch is a prerequisite.)

Basically,
patch1 corresponds to the original issue.
patch2 is a proactive improvement of function_graph tracer. 
patch3 corresponds to II-4(functions under function_graph tracer).
patch4 corresponds to II-5(leaf function).
patch5, 6 and 7 correspond to II-1(slurping stack) and II-2(differences
between x86 and arm64).

Each fix can be applied independently, but if patch5, 6 and 7 are
acceptable, patch1 is not necessary because patch7 replaces a default
stack tracer.

Given the comments and kbuild robot build errors, do you plan to post a
new version of this series?

Will