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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2012-04-23 15:52:53 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2012-07-02 12:33:20 -0700
commitf885b7f2b2de70be266d2cecc476f773a1e2ca5d (patch)
treec4f4d03ca1469f22701b848274034a74c5ae2b04 /kernel/rcutree_trace.c
parentcba6d0d64ee53772b285d0c0c288deefbeaf7775 (diff)
downloadlinaro-lsk-f885b7f2b2de70be266d2cecc476f773a1e2ca5d.tar.gz
rcu: Control RCU_FANOUT_LEAF from boot-time parameter
Although making RCU_FANOUT_LEAF a kernel configuration parameter rather than a fixed constant makes it easier for people to decrease cache-miss overhead for large systems, it is of little help for people who must run a single pre-built kernel binary. This commit therefore allows the value of RCU_FANOUT_LEAF to be increased (but not decreased!) via a boot-time parameter named rcutree.rcu_fanout_leaf. Reported-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcutree_trace.c')
-rw-r--r--kernel/rcutree_trace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
index d4bc16ddd1d..a3556a2d842 100644
--- a/kernel/rcutree_trace.c
+++ b/kernel/rcutree_trace.c
@@ -278,7 +278,7 @@ static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp)
rsp->n_force_qs, rsp->n_force_qs_ngp,
rsp->n_force_qs - rsp->n_force_qs_ngp,
rsp->n_force_qs_lh, rsp->qlen_lazy, rsp->qlen);
- for (rnp = &rsp->node[0]; rnp - &rsp->node[0] < NUM_RCU_NODES; rnp++) {
+ for (rnp = &rsp->node[0]; rnp - &rsp->node[0] < rcu_num_nodes; rnp++) {
if (rnp->level != level) {
seq_puts(m, "\n");
level = rnp->level;