From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg Kroah-Hartman Subject: Re: RFC on fixing mutex spinning on owner Date: Wed, 16 Mar 2016 16:35:30 -0700 Message-ID: <20160316233530.GA8731@kroah.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-rt-users@vger.kernel.org, Linux Kernel Mailing List , kernelnewbies , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Thomas Gleixner To: Joel Fernandes Return-path: Received: from out2-smtp.messagingengine.com ([66.111.4.26]:43896 "EHLO out2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934515AbcCPXff (ORCPT ); Wed, 16 Mar 2016 19:35:35 -0400 Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id A39E820F0F for ; Wed, 16 Mar 2016 19:35:34 -0400 (EDT) Content-Disposition: inline In-Reply-To: Sender: linux-rt-users-owner@vger.kernel.org List-ID: On Wed, Mar 16, 2016 at 04:22:17PM -0700, Joel Fernandes wrote: > Hi, > > On a fairly recent kernel and android userspace, I am seeing that with > i915 driver is in a spin loop waiting for mutex owner to release it > (mutex_spin_on_owner). Why not provide a backtrace to the drm and i915 developers so that they can work on this? The mailing lists you sent this to can't do much about this, sorry... thanks, greg k-h