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authorPaul E. McKenney <paul.mckenney@linaro.org>2010-11-29 21:56:39 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-05-05 23:16:54 -0700
commit12f5f524cafef3ab689929b118f2dfb8bf2be321 (patch)
tree639473556b6edf9b79e0a18d5ba58f80eea76519 /kernel/rcutree_trace.c
parente59fb3120becfb36b22ddb8bd27d065d3cdca499 (diff)
downloadlinaro-lsk-12f5f524cafef3ab689929b118f2dfb8bf2be321.tar.gz
rcu: merge TREE_PREEPT_RCU blocked_tasks[] lists
Combine the current TREE_PREEMPT_RCU ->blocked_tasks[] lists in the rcu_node structure into a single ->blkd_tasks list with ->gp_tasks and ->exp_tasks tail pointers. This is in preparation for RCU priority boosting, which will add a third dimension to the combinatorial explosion in the ->blocked_tasks[] case, but simply a third pointer in the new ->blkd_tasks case. Also update documentation to reflect blocked_tasks[] merge Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcutree_trace.c')
-rw-r--r--kernel/rcutree_trace.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
index 4a21ca55ef7..1cedf94e2c4 100644
--- a/kernel/rcutree_trace.c
+++ b/kernel/rcutree_trace.c
@@ -161,7 +161,6 @@ static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp)
{
unsigned long gpnum;
int level = 0;
- int phase;
struct rcu_node *rnp;
gpnum = rsp->gpnum;
@@ -178,13 +177,11 @@ static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp)
seq_puts(m, "\n");
level = rnp->level;
}
- phase = gpnum & 0x1;
- seq_printf(m, "%lx/%lx %c%c>%c%c %d:%d ^%d ",
+ seq_printf(m, "%lx/%lx %c%c>%c %d:%d ^%d ",
rnp->qsmask, rnp->qsmaskinit,
- "T."[list_empty(&rnp->blocked_tasks[phase])],
- "E."[list_empty(&rnp->blocked_tasks[phase + 2])],
- "T."[list_empty(&rnp->blocked_tasks[!phase])],
- "E."[list_empty(&rnp->blocked_tasks[!phase + 2])],
+ ".G"[rnp->gp_tasks != NULL],
+ ".E"[rnp->exp_tasks != NULL],
+ ".T"[!list_empty(&rnp->blkd_tasks)],
rnp->grplo, rnp->grphi, rnp->grpnum);
}
seq_puts(m, "\n");