From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Zijlstra Subject: Re: [RFC v0 0/3] Simple wait queue support Date: Fri, 7 Aug 2015 11:25:41 +0200 Message-ID: <20150807092541.GE16853@twins.programming.kicks-ass.net> References: <1438781448-10760-1-git-send-email-daniel.wagner@bmw-carit.de> <20150806192243.GD1342@windriver.com> <20150806153120.61186803@gandalf.local.home> <20150806213649.GB16853@twins.programming.kicks-ass.net> <20150806181412.5b474213@gandalf.local.home> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Paul Gortmaker , Daniel Wagner , linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org, bigeasy@linutronix.de, tglx@linutronix.de, paulmck@linux.vnet.ibm.com To: Steven Rostedt Return-path: Content-Disposition: inline In-Reply-To: <20150806181412.5b474213@gandalf.local.home> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org On Thu, Aug 06, 2015 at 06:14:12PM -0400, Steven Rostedt wrote: > On Thu, 6 Aug 2015 23:36:49 +0200 > Peter Zijlstra wrote: > > > On Thu, Aug 06, 2015 at 03:31:20PM -0400, Steven Rostedt wrote: > > > > 4) poll_wait: currently it and poll_table_entry are both hard coupled > > > > to wait_queue_head_t -- so any users of poll_wait are not eligible > > > > for conversion to simple wait. (I just happened to notice that > > > > recently.) A quick grep shows ~500 poll_wait users. > > > > > > Looks like a good candidate to test the cwait on :-) > > > > Poll uses custom wake functions, which disqualifies them on the spot. > > For cwait? That's the complex wait queue (what the current wait queues > will be called in the future). Urgh, I don't think we should go rename that.. that's going to be lots of pain for no to little gain.