From 59d8cc6b2e375ff486b030da6703b1d481e186e6 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Sat, 25 Jan 2020 12:00:40 -0800 Subject: [PATCH] rcu: Forgive slow expedited grace periods at boot time Boot-time processing often loops in the kernel longer than one might prefer, which can prevent expedited grace periods from completing in a timely manner. This in turn triggers a splat In nohz_full CPUs One could argue that long-looping code should be fixed, but on the other hand, boot time is a bit special. This commit therefore removes the splat. Later commits will add the splat back in, but in a way that removes false positives. Reported-by: Borislav Petkov Signed-off-by: Paul E. McKenney --- kernel/rcu/tree_exp.h | 1 - 1 file changed, 1 deletion(-) diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h index 6935a9e2b094..dcbd75791f39 100644 --- a/kernel/rcu/tree_exp.h +++ b/kernel/rcu/tree_exp.h @@ -508,7 +508,6 @@ static void synchronize_rcu_expedited_wait(void) tick_dep_set_cpu(cpu, TICK_DEP_BIT_RCU_EXP); } } - WARN_ON_ONCE(1); } for (;;) {