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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-05-08 12:50:14 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-07-12 15:39:08 -0700 |
| commit | ff3cee39088b1931a432587059d66cd505f785dc (patch) | |
| tree | 1596e62fe98219c882b61e397669015c92854cbb /kernel/rcu/tree_plugin.h | |
| parent | e05121ba5b81e2f85349f038642410578457f6db (diff) | |
| download | lwn-ff3cee39088b1931a432587059d66cd505f785dc.tar.gz lwn-ff3cee39088b1931a432587059d66cd505f785dc.zip | |
rcu: Add up-tree information to dump_blkd_tasks() diagnostics
This commit updates dump_blkd_tasks() to print out quiescent-state
bitmasks for the rcu_node structures further up the tree. This
information helps debugging of interactions between CPU-hotplug
operations and RCU grace-period initialization.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/tree_plugin.h')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 6b85ce936ad4..f45ff97b0d51 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -858,13 +858,15 @@ static void dump_blkd_tasks(struct rcu_node *rnp, int ncheck) { int i; struct list_head *lhp; + struct rcu_node *rnp1; raw_lockdep_assert_held_rcu_node(rnp); - pr_info("%s: grp: %d-%d level: %d ->gp_seq %#lx ->completedqs %#lx\n", + pr_info("%s: grp: %d-%d level: %d ->gp_seq %ld ->completedqs %ld\n", __func__, rnp->grplo, rnp->grphi, rnp->level, - rnp->gp_seq, rnp->completedqs); - pr_info("%s: ->qsmask %#lx ->qsmaskinit %#lx ->qsmaskinitnext %#lx\n", - __func__, rnp->qsmask, rnp->qsmaskinit, rnp->qsmaskinitnext); + (long)rnp->gp_seq, (long)rnp->completedqs); + for (rnp1 = rnp; rnp1; rnp1 = rnp1->parent) + pr_info("%s: %d:%d ->qsmask %#lx ->qsmaskinit %#lx ->qsmaskinitnext %#lx\n", + __func__, rnp1->grplo, rnp1->grphi, rnp1->qsmask, rnp1->qsmaskinit, rnp1->qsmaskinitnext); pr_info("%s: ->gp_tasks %p ->boost_tasks %p ->exp_tasks %p\n", __func__, rnp->gp_tasks, rnp->boost_tasks, rnp->exp_tasks); pr_info("%s: ->blkd_tasks", __func__); |