From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:47006 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751393AbbJWXQW (ORCPT ); Fri, 23 Oct 2015 19:16:22 -0400 Subject: Patch "sched/preempt, xen: Use need_resched() instead of should_resched()" has been added to the 4.1-stable tree To: khlebnikov@yandex-team.ru, agraf@suse.de, boris.ostrovsky@oracle.com, david.vrabel@citrix.com, efault@gmx.de, gregkh@linuxfoundation.org, mingo@kernel.org, paulus@samba.org, peterz@infradead.org, tglx@linutronix.de, torvalds@linux-foundation.org Cc: , From: Date: Fri, 23 Oct 2015 16:16:20 -0700 Message-ID: <144564218016697@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, xen: Use need_resched() instead of should_resched() to the 4.1-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-xen-use-need_resched-instead-of-should_resched.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 0fa2f5cb2b0ecd8d56baa51f35f09aab234eb0bf Mon Sep 17 00:00:00 2001 From: Konstantin Khlebnikov Date: Wed, 15 Jul 2015 12:52:01 +0300 Subject: sched/preempt, xen: Use need_resched() instead of should_resched() From: Konstantin Khlebnikov commit 0fa2f5cb2b0ecd8d56baa51f35f09aab234eb0bf upstream. This code is used only when CONFIG_PREEMPT=n and only in non-atomic context: xen_in_preemptible_hcall is set only in privcmd_ioctl_hypercall(). Thus preempt_count is zero and should_resched() is equal to need_resched(). 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/20150715095201.12246.49283.stgit@buzz Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- drivers/xen/preempt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/xen/preempt.c +++ b/drivers/xen/preempt.c @@ -31,7 +31,7 @@ EXPORT_SYMBOL_GPL(xen_in_preemptible_hca asmlinkage __visible void xen_maybe_preempt_hcall(void) { if (unlikely(__this_cpu_read(xen_in_preemptible_hcall) - && should_resched())) { + && need_resched())) { /* * Clear flag as we may be rescheduled on a different * cpu. Patches currently in stable-queue which might be from khlebnikov@yandex-team.ru are queue-4.1/ovs-do-not-allocate-memory-from-offline-numa-node.patch queue-4.1/sched-preempt-xen-use-need_resched-instead-of-should_resched.patch queue-4.1/sched-preempt-fix-cond_resched_lock-and-cond_resched_softirq.patch