Frederic Weisbecker f268c3737e tick/nohz: Only check for RCU deferred wakeup on user/guest entry when needed ... Checking for and processing RCU-nocb deferred wakeup upon user/guest entry is only relevant when nohz_full runs on the local CPU, otherwise the periodic tick should take care of it. Make sure we don't needlessly pollute these fast-paths as a -3% performance regression on a will-it-scale.per_process_ops has been reported so far. Fixes: 47b8ff194c (entry: Explicitly flush pending rcuog wakeup before last rescheduling point) Fixes: 4ae7dc97f7 (entry/kvm: Explicitly flush pending rcuog wakeup before last rescheduling point) Reported-by: kernel test robot <oliver.sang@intel.com> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Paul E. McKenney <paulmck@kernel.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20210527113441.465489-1-frederic@kernel.org		2021-05-31 10:14:49 +02:00
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Makefile	kernel: Implement selective syscall userspace redirection	2020-12-02 15:07:56 +01:00
common.c	tick/nohz: Only check for RCU deferred wakeup on user/guest entry when needed	2021-05-31 10:14:49 +02:00
common.h	kernel: Implement selective syscall userspace redirection	2020-12-02 15:07:56 +01:00
kvm.c	Merge branch 'core/urgent' into core/entry	2020-11-04 18:14:52 +01:00
syscall_user_dispatch.c	entry: Use different define for selector variable in SUD	2021-02-06 00:21:42 +01:00