From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:37801 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752654AbbJSPJ2 (ORCPT ); Mon, 19 Oct 2015 11:09:28 -0400 Subject: Patch "sched/preempt, powerpc, kvm: Use need_resched() instead of should_resched()" has been added to the 4.2-stable tree To: khlebnikov@yandex-team.ru, agraf@suse.de, boris.ostrovsky@oracle.com, david.vrabel@citrix.com, efault@gmx.de, gregkh@linuxfoundation.org, linux@roeck-us.net, mingo@kernel.org, paulus@samba.org, peterz@infradead.org, tglx@linutronix.de, torvalds@linux-foundation.org Cc: , From: Date: Mon, 19 Oct 2015 08:09:27 -0700 Message-ID: <144526736778113@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled sched/preempt, powerpc, kvm: Use need_resched() instead of should_resched() to the 4.2-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: sched-preempt-powerpc-kvm-use-need_resched-instead-of-should_resched.patch and it can be found in the queue-4.2 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From c56dadf39761a6157239cac39e3988998c994f98 Mon Sep 17 00:00:00 2001 From: Konstantin Khlebnikov Date: Wed, 15 Jul 2015 12:52:03 +0300 Subject: sched/preempt, powerpc, kvm: Use need_resched() instead of should_resched() From: Konstantin Khlebnikov commit c56dadf39761a6157239cac39e3988998c994f98 upstream. Function should_resched() is equal to (!preempt_count() && need_resched()). In preemptive kernel preempt_count here is non-zero because of vc->lock. Signed-off-by: Konstantin Khlebnikov Signed-off-by: Peter Zijlstra (Intel) Cc: Alexander Graf Cc: Boris Ostrovsky Cc: David Vrabel Cc: Linus Torvalds Cc: Mike Galbraith Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/20150715095203.12246.72922.stgit@buzz Signed-off-by: Ingo Molnar Cc: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/kvm/book3s_hv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -2178,7 +2178,7 @@ static int kvmppc_run_vcpu(struct kvm_ru vc->runner = vcpu; if (n_ceded == vc->n_runnable) { kvmppc_vcore_blocked(vc); - } else if (should_resched()) { + } else if (need_resched()) { vc->vcore_state = VCORE_PREEMPT; /* Let something else run */ cond_resched_lock(&vc->lock); Patches currently in stable-queue which might be from khlebnikov@yandex-team.ru are queue-4.2/sched-preempt-fix-cond_resched_lock-and-cond_resched_softirq.patch queue-4.2/sched-preempt-xen-use-need_resched-instead-of-should_resched.patch queue-4.2/sched-preempt-powerpc-kvm-use-need_resched-instead-of-should_resched.patch