diff options
Diffstat (limited to 'drivers/hv/channel_mgmt.c')
| -rw-r--r-- | drivers/hv/channel_mgmt.c | 52 |
1 files changed, 47 insertions, 5 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index 90d65455643..ed9350d4276 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -149,6 +149,7 @@ static struct vmbus_channel *alloc_channel(void) spin_lock_init(&channel->sc_lock); INIT_LIST_HEAD(&channel->sc_list); + INIT_LIST_HEAD(&channel->percpu_list); channel->controlwq = create_workqueue("hv_vmbus_ctl"); if (!channel->controlwq) { @@ -188,7 +189,20 @@ static void free_channel(struct vmbus_channel *channel) queue_work(vmbus_connection.work_queue, &channel->work); } +static void percpu_channel_enq(void *arg) +{ + struct vmbus_channel *channel = arg; + int cpu = smp_processor_id(); + + list_add_tail(&channel->percpu_list, &hv_context.percpu_list[cpu]); +} +static void percpu_channel_deq(void *arg) +{ + struct vmbus_channel *channel = arg; + + list_del(&channel->percpu_list); +} /* * vmbus_process_rescind_offer - @@ -210,6 +224,12 @@ static void vmbus_process_rescind_offer(struct work_struct *work) msg.header.msgtype = CHANNELMSG_RELID_RELEASED; vmbus_post_msg(&msg, sizeof(struct vmbus_channel_relid_released)); + if (channel->target_cpu != smp_processor_id()) + smp_call_function_single(channel->target_cpu, + percpu_channel_deq, channel, true); + else + percpu_channel_deq(channel); + if (channel->primary_channel == NULL) { spin_lock_irqsave(&vmbus_connection.channel_lock, flags); list_del(&channel->listentry); @@ -245,6 +265,7 @@ static void vmbus_process_offer(struct work_struct *work) work); struct vmbus_channel *channel; bool fnew = true; + bool enq = false; int ret; unsigned long flags; @@ -264,12 +285,22 @@ static void vmbus_process_offer(struct work_struct *work) } } - if (fnew) + if (fnew) { list_add_tail(&newchannel->listentry, &vmbus_connection.chn_list); + enq = true; + } spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags); + if (enq) { + if (newchannel->target_cpu != smp_processor_id()) + smp_call_function_single(newchannel->target_cpu, + percpu_channel_enq, + newchannel, true); + else + percpu_channel_enq(newchannel); + } if (!fnew) { /* * Check to see if this is a sub-channel. @@ -282,6 +313,14 @@ static void vmbus_process_offer(struct work_struct *work) spin_lock_irqsave(&channel->sc_lock, flags); list_add_tail(&newchannel->sc_list, &channel->sc_list); spin_unlock_irqrestore(&channel->sc_lock, flags); + + if (newchannel->target_cpu != smp_processor_id()) + smp_call_function_single(newchannel->target_cpu, + percpu_channel_enq, + newchannel, true); + else + percpu_channel_enq(newchannel); + newchannel->state = CHANNEL_OPEN_STATE; if (channel->sc_creation_callback != NULL) channel->sc_creation_callback(newchannel); @@ -365,7 +404,7 @@ static u32 next_vp; * performance critical channels (IDE, SCSI and Network) will be uniformly * distributed across all available CPUs. */ -static u32 get_vp_index(const uuid_le *type_guid) +static void init_vp_index(struct vmbus_channel *channel, const uuid_le *type_guid) { u32 cur_cpu; int i; @@ -387,10 +426,13 @@ static u32 get_vp_index(const uuid_le *type_guid) * Also if the channel is not a performance critical * channel, bind it to cpu 0. */ - return 0; + channel->target_cpu = 0; + channel->target_vp = 0; + return; } cur_cpu = (++next_vp % max_cpus); - return hv_context.vp_index[cur_cpu]; + channel->target_cpu = cur_cpu; + channel->target_vp = hv_context.vp_index[cur_cpu]; } /* @@ -438,7 +480,7 @@ static void vmbus_onoffer(struct vmbus_channel_message_header *hdr) offer->connection_id; } - newchannel->target_vp = get_vp_index(&offer->offer.if_type); + init_vp_index(newchannel, &offer->offer.if_type); memcpy(&newchannel->offermsg, offer, sizeof(struct vmbus_channel_offer_channel)); |