linux-kernel - Re: [PATCH] Kconfig: default to CC_OPTIMIZE_FOR_PERFORMANCE

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Message-ID: <20200508113336.2vdfdnc6tqyx4pu6@butterfly.localdomain>
Date:   Fri, 8 May 2020 13:33:36 +0200
From:   Oleksandr Natalenko <oleksandr@...hat.com>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Kconfig: default to CC_OPTIMIZE_FOR_PERFORMANCE_O3 for
 gcc >= 10

On Fri, May 08, 2020 at 05:21:47AM -0600, Jason A. Donenfeld wrote:
> > Should we untangle -O3 from depending on ARC first maybe?
> 
> Oh, hah, good point. Yes, I'll do that for a v2, but will wait another
> day for feedback first.

Just keep in mind that my previous attempt [1] failed because of too
many false positive warnings despite -O3 really uncovered a couple of
bugs in the codebase.

Lets hope your attempt will be more successfull. I'll happily offer my
review tag ;).

Also Cc'ing Andrew who (IIRC) tried to took my sumbission and Arnd who
tried to clean up the mess afterwards.

[1] https://lore.kernel.org/lkml/20191211104619.114557-1-oleksandr@redhat.com/

-- 
  Best regards,
    Oleksandr Natalenko (post-factum)
    Principal Software Maintenance Engineer