linux-kernel - Re: WARNING: at arch/x86/kernel/stacktrace.c:132 save_stack_trace_tsk

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Message-ID: <20170825150158.knqumqgshzgnisps@treble>
Date:   Fri, 25 Aug 2017 10:01:58 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Jiri Slaby <jslaby@...e.cz>
Cc:     "x86@...nel.org" <x86@...nel.org>,
        Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: WARNING: at arch/x86/kernel/stacktrace.c:132
 save_stack_trace_tsk_reliable

On Fri, Aug 25, 2017 at 03:54:12PM +0200, Jiri Slaby wrote:
> So now, there are two things:
> 1) how to fix orc_find & unwind_init properly?
> 2) how to generate an EMPTY hint for secondary_startup_64 and maybe
> later REGS hint after the rsp setup there? The function seems to be a
> pretty killer for orc generate (among others in head_64.S):

I think the solution is to get head_64.S annotated properly.  Then there
won't be a gap between _stext and the first ORC entry, and we won't need
to fix __orc_find().

I can work up a patch for you to test with.

-- 
Josh