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]
Date:   Mon, 08 Aug 2022 16:01:57 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Duoming Zhou <duoming@....edu.cn>, linux-kernel@...r.kernel.org
Cc:     jstultz@...gle.com, sboyd@...nel.org, edumazet@...gle.com,
        Duoming Zhou <duoming@....edu.cn>
Subject: Re: [PATCH] timers: fix synchronization rules in comments of
 del_timer_sync

On Fri, Jul 01 2022 at 16:55, Duoming Zhou wrote:
> - * Synchronization rules: Callers must prevent restarting of the timer,
> - * otherwise this function is meaningless. It must not be called from
> - * interrupt contexts unless the timer is an irqsafe one. The caller must
> - * not hold locks which would prevent completion of the timer's
> - * handler. The timer's handler must not call add_timer_on(). Upon exit the
> - * timer is not queued and the handler is not running on any CPU.
> + * Synchronization rules: Callers must prevent restarting of the timer in
> + * other places except for the timer's handler, otherwise this function is
> + * meaningless. It must not be called from interrupt contexts unless the
> + * timer is an irqsafe one. The caller must not hold locks which would
> + * prevent completion of the timer's handler. The timer's handler must
> + * not call add_timer_on().

If we are making this correct: What's so special about add_timer_on()?

Thanks,

        tglx

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ