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Commit 5ab07a8d authored by Paul E. McKenney's avatar Paul E. McKenney
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srcu: Add address of first callback to rcutorture output 



This commit adds the address of the first callback to the per-CPU rcutorture
output in order to allow lost wakeups to be more efficiently tracked down.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 17294ce6

kernel/rcu/srcutree.c

+8 −7
Original line number Diff line number Diff line
@@ -1271,11 +1271,11 @@ void srcu_torture_stats_print(struct srcu_struct *sp, char *tt, char *tf) 
		unsigned long l0, l1;

		unsigned long u0, u1;

		long c0, c1;

		struct srcu_data *counts;

		struct srcu_data *sdp;



		counts = per_cpu_ptr(sp->sda, cpu);

		u0 = counts->srcu_unlock_count[!idx];

		u1 = counts->srcu_unlock_count[idx];

		sdp = per_cpu_ptr(sp->sda, cpu);

		u0 = sdp->srcu_unlock_count[!idx];

		u1 = sdp->srcu_unlock_count[idx];



		/*

		 * Make sure that a lock is always counted if the corresponding
@@ -1283,12 +1283,13 @@ void srcu_torture_stats_print(struct srcu_struct *sp, char *tt, char *tf) 
		 */

		smp_rmb();



		l0 = counts->srcu_lock_count[!idx];

		l1 = counts->srcu_lock_count[idx];

		l0 = sdp->srcu_lock_count[!idx];

		l1 = sdp->srcu_lock_count[idx];



		c0 = l0 - u0;

		c1 = l1 - u1;

		pr_cont(" %d(%ld,%ld)", cpu, c0, c1);

		pr_cont(" %d(%ld,%ld %1p)",

			cpu, c0, c1, rcu_segcblist_head(&sdp->srcu_cblist));

		s0 += c0;

		s1 += c1;

	}