From mboxrd@z Thu Jan 1 00:00:00 1970 From: Takuya Yoshikawa Subject: Re: [RFC] sched: make callers check lock contention for cond_resched_lock() Date: Fri, 11 May 2012 07:03:57 +0900 Message-ID: <20120511070357.9bf8f9b6636a12927f26bfed@gmail.com> References: <20120503171244.2debdd80931ccf35f387c5fe@gmail.com> <1336034127.13683.197.camel@twins> <20120503212244.6abbfa8bc3f46a7f7a932bb7@gmail.com> <1336048150.22523.17.camel@twins> <20120503220050.e91938418f882b4075526e08@gmail.com> <1336060050.22523.23.camel@twins> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, kvm@vger.kernel.org, avi@redhat.com, mtosatti@redhat.com, yoshikawa.takuya@oss.ntt.co.jp To: Peter Zijlstra , mingo@kernel.org Return-path: In-Reply-To: <1336060050.22523.23.camel@twins> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org Replaced Ingo's address with kernel.org one, On Thu, 03 May 2012 17:47:30 +0200 Peter Zijlstra wrote: > On Thu, 2012-05-03 at 22:00 +0900, Takuya Yoshikawa wrote: > > But as I could not see why spin_needbreak() was differently > > implemented > > depending on CONFIG_PREEMPT, I wanted to understand the meaning. > > Its been that way since before voluntary preemption was introduced, so > its possible Ingo simply missed that spot and nobody noticed until now. > > Ingo, do you have any recollections from back when? ping Takuya