Commit-ID: 5ab07a8df4d6c958ca63640d3f2ef896f0679c05
Gitweb: https://git.kernel.org/tip/5ab07a8df4d6c958ca63640d3f2ef896f0679c05
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Tue, 22 May 2018 12:28:04 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Mon, 25 Jun 2018 11:26:24 -0700
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: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/rcu/srcutree.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c
index 37bef2fe80e6..5a1a9a07b407 100644
--- a/kernel/rcu/srcutree.c
+++ b/kernel/rcu/srcutree.c
@@ -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;
}
--
To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
|