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authorPaul E. McKenney <paulmck@kernel.org>2019-08-15 11:43:53 -0700
committerPaul E. McKenney <paulmck@kernel.org>2019-10-05 11:50:18 -0700
commitfbbd5e358cecb5fa490550ace66463517a7577e8 (patch)
treec251b136d8d2b2f28b351d6bbbd3d31c97f2ce06 /kernel/locking
parent8b5ddf8b99dc42241d1d413c6685bce18275c40e (diff)
rcutorture: Make in-kernel-loop testing more brutal
The rcu_torture_fwd_prog_nr() tests the ability of RCU to tolerate in-kernel busy loops. It invokes rcu_torture_fwd_prog_cond_resched() within its delay loop, which, in PREEMPT && NO_HZ_FULL kernels results in the occasional direct call to schedule(). Now, this direct call to schedule() is appropriate for call_rcu() flood testing, in which either the kernel should restrain itself or userspace transitions will supply the needed restraint. But in pure in-kernel loops, the occasional cond_resched() should do the job. This commit therefore makes rcu_torture_fwd_prog_nr() use cond_resched() instead of rcu_torture_fwd_prog_cond_resched() in order to increase the brutality of this aspect of rcutorture testing. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/locking')
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