Message-ID: <1429195375.6795.46.camel@stgolabs.net>
Subject: Re: [PATCH 2/3 v2] futex: avoid double wake up in futex_wake() on
 -RT
From: Davidlohr Bueso <dave@stgolabs.net>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
        Darren Hart <darren@dvhart.com>, Steven Rostedt <rostedt@goodmis.org>,
        fredrik.markstrom@windriver.com,
        Manfred Spraul <manfred@colorfullife.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>
Date: Thu, 16 Apr 2015 07:42:55 -0700
In-Reply-To: <20150416101637.GC5029@twins.programming.kicks-ass.net>
References: <1428419030-20030-1-git-send-email-bigeasy@linutronix.de>
	 <1428419030-20030-3-git-send-email-bigeasy@linutronix.de>
	 <alpine.DEB.2.11.1504072131400.3845@nanos>
	 <20150410161135.GF3057@linutronix.de>
	 <1428894155.16668.6.camel@stgolabs.net>
	 <1429160982.6795.35.camel@stgolabs.net>
	 <alpine.DEB.2.11.1504161112420.3845@nanos>
	 <20150416101637.GC5029@twins.programming.kicks-ass.net>
Content-Type: text/plain; charset="UTF-8"
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 704
Lines: 20

On Thu, 2015-04-16 at 12:16 +0200, Peter Zijlstra wrote:
> But if we decide we want to go do this, I'd propose we reintroduce this
> delayed wake list thing again.

Given that futexes aren't the only potential users, I definitely agree.
Lemme cleanup the patches and I'll resend. Now, one thing I wonder about
is if we should bother making it a delayed list a plist instead -- as
not all users would consider rt-tasks like futexes do.

Thanks,
Davidlohr

 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/