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authorDexuan Cui <decui@microsoft.com>2015-08-05 00:52:39 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-08-05 11:44:28 -0700
commit3b71107d73b16074afa7658f3f0fcf837aabfe24 (patch)
treed2a7a477f04342c280ec6b430828f62dfd796e2e /drivers
parent9f01ec53458d9e9b68f1c555e773b5d1a1f66e94 (diff)
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Drivers: hv: vmbus: Further improve CPU affiliation logic
Keep track of CPU affiliations of sub-channels within the scope of the primary channel. This will allow us to better distribute the load amongst available CPUs. Signed-off-by: Dexuan Cui <decui@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/hv/channel_mgmt.c20
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 39c5afc7970c..2f9aead4ecfc 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -448,8 +448,24 @@ static void init_vp_index(struct vmbus_channel *channel, const uuid_le *type_gui
cpumask_xor(&available_mask, alloced_mask,
cpumask_of_node(primary->numa_node));
- cur_cpu = cpumask_next(-1, &available_mask);
- cpumask_set_cpu(cur_cpu, alloced_mask);
+ cur_cpu = -1;
+ while (true) {
+ cur_cpu = cpumask_next(cur_cpu, &available_mask);
+ if (cur_cpu >= nr_cpu_ids) {
+ cur_cpu = -1;
+ cpumask_copy(&available_mask,
+ cpumask_of_node(primary->numa_node));
+ continue;
+ }
+
+ if (!cpumask_test_cpu(cur_cpu,
+ &primary->alloced_cpus_in_node)) {
+ cpumask_set_cpu(cur_cpu,
+ &primary->alloced_cpus_in_node);
+ cpumask_set_cpu(cur_cpu, alloced_mask);
+ break;
+ }
+ }
channel->target_cpu = cur_cpu;
channel->target_vp = hv_context.vp_index[cur_cpu];