linux-kernel - Re: [PATCH 1/2] x86: Fix return value in frequency invariance setup for XEON_PHI

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Date:   Mon, 23 May 2022 11:57:23 +0200
From:   Giovanni Gherdovich <ggherdovich@...e.cz>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Borislav Petkov <bp@...en8.de>, Ingo Molnar <mingo@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] x86: Fix return value in frequency invariance setup
 for XEON_PHI_KNL/KNM

On Sat, 2022-05-21 at 12:02 +0200, Peter Zijlstra wrote:
> On Fri, May 20, 2022 at 06:10:21PM +0200, Giovanni Gherdovich wrote:
> > knl_set_max_freq_ratio() should return true on success and false
> > otherwise. If the last line of the function body is reached, it means no
> > appropriate value for turbo_freq was found: the setup is unsuccessful and
> > it should return false.
> > 
> > Fixes: 8bea0dfb4a82 ("x86, sched: Add support for frequency invariance on XEON_PHI_KNL/KNM")
> > Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
> > Signed-off-by: Giovanni Gherdovich <ggherdovich@...e.cz>
> > ---
> >  arch/x86/kernel/smpboot.c | 2 +-
> 
> You seems to have missed all that code moved in tip. This no longer
> applies.

Right. I'll rebase and resend. Plus, as per Dave Hansen's comments on
the other patch, I need to have a second look at it.

Giovanni