From: Thomas Gleixner <tglx@linutronix.de>
To: Kurt Kanzenbach <kurt@linutronix.de>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Alejandro Colomar <alx.manpages@gmail.com>
Cc: linux-man@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Kurt Kanzenbach <kurt@linutronix.de>
Subject: Re: [PATCH v1] futex.2: Document FUTEX_LOCK_PI2
Date: Thu, 29 Jul 2021 10:18:29 +0200 [thread overview]
Message-ID: <8735rxjzxm.ffs@tglx> (raw)
In-Reply-To: <20210625101051.1206558-1-kurt@linutronix.de>
On Fri, Jun 25 2021 at 12:10, Kurt Kanzenbach wrote:
> FUTEX_LOCK_PI2 is a new futex operation which was recently introduced into the
> Linux kernel. It works exactly like FUTEX_LOCK_PI. However, it has support for
> selectable clocks for timeouts. By default CLOCK_MONOTONIC is used. If
> FUTEX_CLOCK_REALTIME is specified then the timeout is measured against
> CLOCK_REALTIME.
>
> This new operation addresses an inconsistency in the futex interface:
> FUTEX_LOCK_PI only works with timeouts based on CLOCK_REALTIME in contrast to
> all the other PI operations.
>
> Document the FUTEX_LOCK_PI2 command.
>
> Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
next prev parent reply other threads:[~2021-07-29 8:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-25 10:10 [PATCH v1] futex.2: Document FUTEX_LOCK_PI2 Kurt Kanzenbach
2021-07-29 8:18 ` Thomas Gleixner [this message]
2021-07-29 10:22 ` Alejandro Colomar (man-pages)
2021-07-29 10:58 ` Kurt Kanzenbach
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