From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: To: linux-kernel@vger.kernel.org From: Holger =?iso-8859-1?q?Hoffst=E4tte?= Subject: Re: [PATCH 3.17 00/25] 3.17.1-stable review Date: Wed, 19 Nov 2014 20:19:40 +0000 (UTC) Message-ID: References: <20141013022454.289398272@linuxfoundation.org> <20141013112834.GA10826@khazad-dum.debian.net> <20141013082319.175d90bb@as> <20141119172235.GA31260@kroah.com> <20141119194414.GN5050@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: stable@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: On Wed, 19 Nov 2014 11:44:14 -0800, Paul E. McKenney wrote: > On Wed, Nov 19, 2014 at 09:22:35AM -0800, Greg Kroah-Hartman wrote: >> >> Doesn't build in 3.17 properly :( > > Older kernels can use rcu_note_context_switch() instead of > rcu_note_voluntary_context_switch(), which didn't show up until quite > recently. Please note that rcu_note_context_switch() is quite a bit > more heavy-weight than is rcu_note_voluntary_context_switch(), but it > should be OK in this context. When I tried this in 3.14.x the kernel would lock up immediately during boot (not even a console). This may or may not have to do with me also using the BFS scheduler, but it's IMHO something that should be double-checked. I also tried to backport the necessary macros but that went nowhere fast, since they ended up pulling in most of the rcu-task stuff.. -h