linux-kernel - Re: 0e334db6bb4b1fd1e2d72c1f3d8f004313cd9f94 (posix-timers: Fix, division by zero bug). Problems with glibc.

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Message-ID: <1682db6c-0e70-f4d2-ecc7-6dabbccdcccc@cs.ucla.edu>
Date:   Sat, 2 Feb 2019 22:28:49 -0800
From:   Paul Eggert <eggert@...ucla.edu>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Alex Branham <alex.branham@...il.com>, Alan Mackenzie <acm@....de>,
        Eli Zaretskii <eliz@....org>, linux-kernel@...r.kernel.org,
        34235@...bugs.gnu.org
Subject: Re: 0e334db6bb4b1fd1e2d72c1f3d8f004313cd9f94 (posix-timers: Fix,
 division by zero bug). Problems with glibc.

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.