linux-kernel - Re: [PATCH v2 21/25] timekeeping: Rework timekeeping_resume() to use shadow

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CANDhNCpGPfuLYj_jPPV7Vj-ncEqV36K7-PLPeFufF1MuCJMJBg@mail.gmail.com>
Date: Thu, 24 Oct 2024 15:18:28 -0700
From: John Stultz <jstultz@...gle.com>
To: Anna-Maria Behnsen <anna-maria@...utronix.de>
Cc: Frederic Weisbecker <frederic@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, 
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
	Miroslav Lichvar <mlichvar@...hat.com>, Richard Cochran <richardcochran@...il.com>, 
	Christopher S Hall <christopher.s.hall@...el.com>
Subject: Re: [PATCH v2 21/25] timekeeping: Rework timekeeping_resume() to use shadow_timekeeper

On Wed, Oct 9, 2024 at 1:29 AM Anna-Maria Behnsen
<anna-maria@...utronix.de> wrote:
>
> From: Anna-Maria Behnsen <anna-maria@...utronix.de>
>
> Updates of the timekeeper can be done by operating on the shadow timekeeper
> and afterwards copying the result into the real timekeeper. This has the
> advantage, that the sequence count write protected region is kept as small
> as possible.
>
> While the sequence count held time is not relevant for the resume path as
> there is no concurrency, there is no reason to have this function
> different than all the other update sites.
>
> Convert timekeeping_inject_offset() to use this scheme and cleanup the
> variable declaration while at it.
>
> Signed-off-by: Anna-Maria Behnsen <anna-maria@...utronix.de>

Other than the tk_shadow naming nit from earlier,
Acked-by: John Stultz <jstultz@...gle.com>