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| author |   Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | 2019-09-19 13:37:04 -0400 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2019-09-25 17:42:31 +0200 |
| commit | c6d68c1c4a4d6611fc0f8145d764226571d737ca (patch) | |
| tree | f808d18297778aa54b35e5cd6bf838b2636d2f8d /kernel/groups.c | |
| parent | selftests, sched/membarrier: Add multi-threaded test (diff) | |
| download | linux-dev-c6d68c1c4a4d6611fc0f8145d764226571d737ca.tar.xz linux-dev-c6d68c1c4a4d6611fc0f8145d764226571d737ca.zip | |
sched/membarrier: Skip IPIs when mm->mm_users == 1
If there is only a single mm_user for the mm, the private expedited
membarrier command can skip the IPIs, because only a single thread
is using the mm.
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: Oleg Nesterov <oleg@redhat.com>
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/20190919173705.2181-7-mathieu.desnoyers@efficios.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/groups.c')
0 files changed, 0 insertions, 0 deletions