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From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Thu, 9 Mar 2017 13:16:09 +0100
Message-ID: <CAMuHMdUmHEjrLoB=S+wto6Z4mP7-DxkO83FWn37soQ6sXSSGDQ@mail.gmail.com>
Subject: Re: v4.10: kernel stack frame pointer .. has bad value (null)
To: Pavel Machek <pavel@ucw.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Andy Lutomirski <luto@amacapital.net>,
        kernel list <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@kernel.org>, Andrew Lutomirski <luto@kernel.org>,
        Borislav Petkov <bp@alien8.de>, Brian Gerst <brgerst@gmail.com>,
        Denys Vlasenko <dvlasenk@redhat.com>, Peter Anvin <hpa@zytor.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>
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Hi Pavel,

On Thu, Mar 9, 2017 at 11:56 AM, Pavel Machek <pavel@ucw.cz> wrote:
> On Thu 2017-03-09 10:38:46, Geert Uytterhoeven wrote:
>> On Wed, Mar 8, 2017 at 10:22 PM, Pavel Machek <pavel@ucw.cz> wrote:
>> > Well, I have fast CPUs, but most of the time they just compile
>> > stuff. Especially bisect is compile-heavy. I suspect going back to
>> > gcc-3.2 would bring me bigger advantages than CPU upgrade...
>>
>> I hope you do use ccache or distcc?
>
> I tried to use distcc before, but it was rather hard to maintain. No
> ccache here. Hmm. I guess ccache really makes sense for bisect.

Yes it does. So if you're not using it yet, do the below, today, not tomorrow.

If your distro supports it, prepend /usr/lib/ccache/ to your $PATH.
Create symlinks from the names of your favorite cross-compilers
to /usr/bin/ccache, and make sure they are early in your $PATH.

That's it! Enjoy!

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds