linux-kernel - Re: [PATCH 1/2] x86, sched: Prevent divisions by zero in frequency invariant accounting

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Message-ID: <20200518222037.GA14829@ranerica-svr.sc.intel.com>
Date:   Mon, 18 May 2020 15:20:37 -0700
From:   Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To:     Giovanni Gherdovich <ggherdovich@...e.cz>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...e.de>,
        Len Brown <lenb@...nel.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>, x86@...nel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 1/2] x86, sched: Prevent divisions by zero in frequency
 invariant accounting

On Sat, May 02, 2020 at 04:25:00PM +0200, Giovanni Gherdovich wrote:
> > 
> > I've changed the patch like so.. OK?
> > 
> > (ok, perhaps I went a little overboard with the paranoia ;-)
> 
> Right, I wasn't really checking for overflow, only for when the product
> "mcnt * arch_max_freq_ratio" becomes zero.
> 
> Thanks for your edit (I took note of the macros check_*_overflow, didn't know
> them). I fully subscribe to the paranoid approach.
> 
> I understand you've already edited the patches in your tree, so I am not
> resending, just confirming my
> 
> Signed-off-by: Giovanni Gherdovich <ggherdovich@...e.cz>

Hi, have these changes been merged? I still don't see them in the tip or
Linus' tree.

Thanks and BR,
Ricardo