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Subject: Re: 0e334db6bb4b1fd1e2d72c1f3d8f004313cd9f94 (posix-timers: Fix,
 division by zero bug). Problems with glibc.
To:     Thomas Gleixner <tglx@linutronix.de>
Cc:     Alex Branham <alex.branham@gmail.com>, Alan Mackenzie <acm@muc.de>,
        Eli Zaretskii <eliz@gnu.org>, linux-kernel@vger.kernel.org,
        34235@debbugs.gnu.org
References: <17880b13-2fde-764d-a284-11cf0caf1cec@cs.ucla.edu>
 <alpine.DEB.2.21.1902021020020.8200@nanos.tec.linutronix.de>
From:   Paul Eggert <eggert@cs.ucla.edu>
Organization: UCLA Computer Science Department
Message-ID: <1682db6c-0e70-f4d2-ecc7-6dabbccdcccc@cs.ucla.edu>
Date:   Sat, 2 Feb 2019 22:28:49 -0800
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Thomas Gleixner wrote:
> Can you please verify whether the issue is fixed with 4.19.19?

It depends on what you mean by "verify". I looked at the Linux kernel source 
code and checked that the "posix-cpu-timers: Unbreak timer rearming" patch is in 
4.19.19 (but not 4.19.18) and in 4.20.6 (but not 4.20.5). I did not test Emacs's 
CPU profiler on these kernels, as I don't have them installed. I expect to 
upgrade soon to 4.20.6 (whenever Fedora 29 release does - 4.20.6 was submitted 
for testing a couple of days ago) and plan to give it a try then.