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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Yuri Norov If CPU runs isolated task, there's no any backlog on it, and so we don't need to flush it. Currently flush_all_backlogs() enqueues corresponding work on all CPUs including ones that run isolated tasks. It leads to breaking task isolation for nothing. In this patch, backlog flushing is enqueued only on non-isolated CPUs. Signed-off-by: Yuri Norov [abelits@marvell.com: use safe task_isolation_on_cpu() implementation] Signed-off-by: Alex Belits --- net/core/dev.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/net/core/dev.c b/net/core/dev.c index 90b59fc50dc9..83a282f7453d 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -74,6 +74,7 @@ #include #include #include +#include #include #include #include @@ -5624,9 +5625,13 @@ static void flush_all_backlogs(void) get_online_cpus(); - for_each_online_cpu(cpu) + smp_rmb(); + for_each_online_cpu(cpu) { + if (task_isolation_on_cpu(cpu)) + continue; queue_work_on(cpu, system_highpri_wq, per_cpu_ptr(&flush_works, cpu)); + } for_each_online_cpu(cpu) flush_work(per_cpu_ptr(&flush_works, cpu)); -- 2.26.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel