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rcu: Fix CPU-offline trace in rcutree_dying_cpu

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The condition in the trace_rcu_grace_period() in rcutree_dying_cpu() is
backwards, so that it uses the string "cpuofl" when the offline CPU is
blocking the current grace period and "cpuofl-bgp" otherwise.  Given that
the "-bgp" stands for "blocking grace period", this is at best misleading.
This commit therefore switches these strings in order to correctly trace
whether the outgoing cpu blocks the current grace period.

Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Neeraj Upadhyay 2021-01-11 17:15:58 +05:30 committed by Paul E. McKenney
parent d3ad5bbc4d
commit 47fcbc8dd6
1 changed files with 1 additions and 1 deletions
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2
kernel/rcu/tree.c
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@ -2413,7 +2413,7 @@ int rcutree_dying_cpu(unsigned int cpu)
blkd = !!(rnp->qsmask & rdp->grpmask);
trace_rcu_grace_period(rcu_state.name, READ_ONCE(rnp->gp_seq),
blkd ? TPS("cpuofl") : TPS("cpuofl-bgp"));
blkd ? TPS("cpuofl-bgp") : TPS("cpuofl"));
return 0;
}