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 <[email protected]> --- kernel/rcu/tree_plugin.h | 10 ++++++---- 1 file 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__); -- 2.17.1
