linux-kernel - Re: [PATCH v3 5/5] kernel: tracepoints: add support for relative references

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Message-Id: <6AAA934E-D167-431D-8021-DD2EAF3409DD@linaro.org>
Date:   Wed, 30 Aug 2017 19:26:07 +0100
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        "H. Peter Anvin" <hpa@...or.com>, Arnd Bergmann <arnd@...db.de>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Kees Cook <keescook@...omium.org>,
        Will Deacon <will.deacon@....com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Thomas Garnier <thgarnie@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Petr Mladek <pmladek@...e.com>, Ingo Molnar <mingo@...hat.com>,
        James Morris <james.l.morris@...cle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Nicolas Pitre <nico@...aro.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jessica Yu <jeyu@...nel.org>
Subject: Re: [PATCH v3 5/5] kernel: tracepoints: add support for relative references



> On 30 Aug 2017, at 19:13, Steven Rostedt <rostedt@...dmis.org> wrote:
> 
> On Sat, 19 Aug 2017 19:10:35 +0100
> Ard Biesheuvel <ard.biesheuvel@...aro.org> wrote:
> 
>> To avoid the need for relocating absolute references to tracepoint
>> structures at boot time when running relocatable kernels (which may
>> take a disproportionate amount of space), add the option to emit
>> these tables as relative references instead.
>> 
>> Cc: Steven Rostedt <rostedt@...dmis.org>
> 
> I ran this through various tests (not my full test suite mind you), and
> it appears to work as it has before.
> 
> Acked-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
> 

Thanks!