Mathieu Desnoyers e250f2b6aa sched/membarrier: Call sync_core only before usermode for same mm ... [ Upstream commit 2840cf02fa ] When the prev and next task's mm change, switch_mm() provides the core serializing guarantees before returning to usermode. The only case where an explicit core serialization is needed is when the scheduler keeps the same mm for prev and next. Suggested-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Christoph Lameter <cl@linux.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Kirill Tkhai <tkhai@yandex.ru> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul E. McKenney <paulmck@linux.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russell King - ARM Linux admin <linux@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20190919173705.2181-4-mathieu.desnoyers@efficios.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-10-11 18:21:21 +02:00
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autogroup.h
clock.h
coredump.h	oom, oom_reaper: do not enqueue same task twice	2019-02-06 17:30:14 +01:00
cpufreq.h
cputime.h
deadline.h
debug.h
hotplug.h
idle.h
init.h
isolation.h
jobctl.h
loadavg.h
mm.h	sched/membarrier: Call sync_core only before usermode for same mm	2019-10-11 18:21:21 +02:00
nohz.h
numa_balancing.h	sched/fair: Don't free p->numa_faults with concurrent readers	2019-08-04 09:30:56 +02:00
prio.h
rt.h
signal.h	ptrace: take into account saved_sigmask in PTRACE{GET,SET}SIGMASK	2019-05-04 09:20:22 +02:00
smt.h	x86/speculation: Rework SMT state change	2018-12-05 19:32:02 +01:00
stat.h
sysctl.h	kernel/hung_task.c: allow to set checking interval separately from timeout	2018-08-22 10:52:47 -07:00
task.h
task_stack.h
topology.h	sched/topology: Fix percpu data types in struct sd_data & struct s_data	2019-04-05 22:33:09 +02:00
user.h	userns: use refcount_t for reference counting instead atomic_t	2018-08-22 10:52:46 -07:00
wake_q.h
xacct.h