linux-kernel - Re: Revised futex(2) man page for review

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Message-ID: <871tk6os1y.fsf@rustcorp.com.au>
Date:	Tue, 31 Mar 2015 12:18:41 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	"Michael Kerrisk \(man-pages\)" <mtk.manpages@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Darren Hart <dvhart@...ux.intel.com>
Cc:	mtk.manpages@...il.com, Carlos O'Donell <carlos@...hat.com>,
	Darren Hart <dvhart@...ux.intel.com>,
	Ingo Molnar <mingo@...e.hu>, Jakub Jelinek <jakub@...hat.com>,
	"linux-man\@vger.kernel.org" <linux-man@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Davidlohr Bueso <dave@...olabs.net>,
	Arnd Bergmann <arnd@...db.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Linux API <linux-api@...r.kernel.org>,
	Torvald Riegel <triegel@...hat.com>,
	Roland McGrath <roland@...k.frob.com>,
	Darren Hart <dvhart@...radead.org>,
	Anton Blanchard <anton@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Eric Dumazet <edumazet@...gle.com>,
	bill o gallmeister <bgallmeister@...il.com>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Daniel Wagner <wagi@...om.org>, Rich Felker <dalias@...c.org>,
	Andy Lutomirski <luto@...capital.net>,
	bert hubert <bert.hubert@...herlabs.nl>,
	Heinrich Schuchardt <xypron.glpk@....de>
Subject: Re: Revised futex(2) man page for review

"Michael Kerrisk (man-pages)" <mtk.manpages@...il.com> writes:
> When executing a futex operation that requests to block a thread,
> the kernel will only block if the futex word has the value that the
> calling thread supplied as expected value.
> The load from the futex word, the comparison with
> the expected value,
> and the actual blocking will happen atomically and totally
> ordered with respect to concurrently executing futex operations
> on the same futex word,
> such as operations that wake threads blocked on this futex word.
> Thus, the futex word is used to connect the synchronization in user spac

Missing 'e' in "space".

> .\" FIXME Please confirm that the following is correct:
> No guarantee is provided about which waiters are awoken
> (e.g., a waiter with a higher scheduling priority is not guaranteed
> to be awoken in preference to a waiter with a lower priority).

This is true.

I didn't read the rest, as that stuff was all written by others.
Documenting them is pretty heroic; good job!

Thanks,
Rusty.
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