From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933736AbcI2KLA (ORCPT ); Thu, 29 Sep 2016 06:11:00 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:43873 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932607AbcI2KK7 (ORCPT ); Thu, 29 Sep 2016 06:10:59 -0400 Date: Thu, 29 Sep 2016 12:10:40 +0200 From: Peter Zijlstra To: Pan Xinhui Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, virtualization@lists.linux-foundation.org, linux-s390@vger.kernel.org, xen-devel-request@lists.xenproject.org, kvm@vger.kernel.org, benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, mingo@redhat.com, paulmck@linux.vnet.ibm.com, will.deacon@arm.com, kernellwp@gmail.com, jgross@suse.com, pbonzini@redhat.com, bsingharora@gmail.com Subject: Re: [PATCH v3 0/4] implement vcpu preempted check Message-ID: <20160929101040.GV5016@twins.programming.kicks-ass.net> References: <1469101514-49475-1-git-send-email-xinhui.pan@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1469101514-49475-1-git-send-email-xinhui.pan@linux.vnet.ibm.com> User-Agent: Mutt/1.5.23.1 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jul 21, 2016 at 07:45:10AM -0400, Pan Xinhui wrote: > change from v2: > no code change, fix typos, update some comments > > change from v1: > a simplier definition of default vcpu_is_preempted > skip mahcine type check on ppc, and add config. remove dedicated macro. > add one patch to drop overload of rwsem_spin_on_owner and mutex_spin_on_owner. > add more comments > thanks boqun and Peter's suggestion. > > This patch set aims to fix lock holder preemption issues. So I really like the concept, but I would also really like to see support for more hypervisors included before we can move forward with this. Please consider s390 and (x86/arm) KVM. Once we have a few, more can follow later, but I think its important to not only have PPC support for this.