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rcu: Fix typo and add additional debug 

This commit fixes a typo and adds some additional debugging to the
message emitted when a task blocking the current grace period is listed
as blocking it when either that grace period ends or the next grace
period begins.  This commit also reformats the console message for
readability.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2018-05-01 15:00:10 -07:00
parent c74859d1eb
commit 77cfc7bf24
2 changed files with 9 additions and 2 deletions
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1
kernel/rcu/tree.c
View File

@ -2316,6 +2316,7 @@ static void rcu_report_unblock_qs_rnp(struct rcu_state *rsp,
return; /* Still need more quiescent states! */
}
rnp->completedqs = rnp->gp_seq;
rnp_p = rnp->parent;
if (rnp_p == NULL) {
/*

10
kernel/rcu/tree_plugin.h
View File

@ -856,8 +856,14 @@ static void dump_blkd_tasks(struct rcu_node *rnp, int ncheck)
struct list_head *lhp;
raw_lockdep_assert_held_rcu_node(rnp);
pr_info("%s: grp: %d-%d level: %d ->qamask %#lx ->gp_tasks %p ->boost_tasks %p ->exp_tasks %p &->blkd_tasks: %p offset: %u\n", __func__, rnp->grplo, rnp->grphi, rnp->level, rnp->qsmask, rnp->gp_tasks, rnp->boost_tasks, rnp->exp_tasks, &rnp->blkd_tasks, (unsigned int)offsetof(typeof(*rnp), blkd_tasks));
pr_cont("\t->blkd_tasks");
pr_info("%s: grp: %d-%d level: %d ->gp_seq %#lx ->completedqs %#lx\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);
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__);
i = 0;
list_for_each(lhp, &rnp->blkd_tasks) {
pr_cont(" %p", lhp);