Messages in this thread Patch in this message | | | From | "Paul E. McKenney" <> | Subject | [PATCH tip/core/rcu 16/48] rcu: permit discontiguous cpu_possible_mask CPU numbering | Date | Tue, 4 May 2010 13:19:26 -0700 |
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TREE_RCU assumes that CPU numbering is contiguous, but some users need large holes in the numbering to better map to hardware layout. This patch makes TREE_RCU (and TREE_PREEMPT_RCU) tolerate large holes in the CPU numbering. However, NR_CPUS must still be greater than the largest CPU number.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> --- kernel/rcutree.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/rcutree.c b/kernel/rcutree.c index f391886..c60fd74 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -1913,7 +1913,7 @@ static void __init rcu_init_one(struct rcu_state *rsp) rnp = rsp->level[NUM_RCU_LVLS - 1]; for_each_possible_cpu(i) { - if (i > rnp->grphi) + while (i > rnp->grphi) rnp++; rsp->rda[i]->mynode = rnp; rcu_boot_init_percpu_data(i, rsp); -- 1.7.0
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