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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-07-18 22:52:18 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-07-25 01:04:18 +0200 |
| commit | 96036c43066a04c99353abb4a342cc38a52d36f2 (patch) | |
| tree | fddf8ad685ec40fc96f87cdbebff859a4833cc04 /kernel/rcu | |
| parent | rcutorture: Eliminate unused ts_rem local from rcu_trace_clock_local() (diff) | |
| download | linux-96036c43066a04c99353abb4a342cc38a52d36f2.tar.xz linux-96036c43066a04c99353abb4a342cc38a52d36f2.zip | |
rcu: Add last-CPU to GP-kthread starvation messages
This commit augments the grace-period-kthread starvation debugging
messages by adding the last CPU that ran the kthread.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 51d4c3acf32d..48c6ab5ca164 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1358,12 +1358,13 @@ static void rcu_check_gp_kthread_starvation(struct rcu_state *rsp) j = jiffies; gpa = READ_ONCE(rsp->gp_activity); if (j - gpa > 2 * HZ) { - pr_err("%s kthread starved for %ld jiffies! g%lu c%lu f%#x %s(%d) ->state=%#lx\n", + pr_err("%s kthread starved for %ld jiffies! g%lu c%lu f%#x %s(%d) ->state=%#lx ->cpu=%d\n", rsp->name, j - gpa, rsp->gpnum, rsp->completed, rsp->gp_flags, gp_state_getname(rsp->gp_state), rsp->gp_state, - rsp->gp_kthread ? rsp->gp_kthread->state : ~0); + rsp->gp_kthread ? rsp->gp_kthread->state : ~0, + rsp->gp_kthread ? task_cpu(rsp->gp_kthread) : -1); if (rsp->gp_kthread) { sched_show_task(rsp->gp_kthread); wake_up_process(rsp->gp_kthread); |