Author: sephe
Date: Thu Mar 24 02:15:23 2016
New Revision: 297221
URL: https://svnweb.freebsd.org/changeset/base/297221
Log:
hyperv/vmbus: Create per-cpu fast taskqueue for msg handling
Using one taskqueue does not work, since the EOM MSR must be written
on the msg's owner CPU.
Noticed by: Jun Su <junsu microsoft com>
Discussed with: Jun Su <junsu microsoft com>, Dexuan Cui <decui
microsoft com>
MFC after: 1 week
Sponsored by: Microsoft OSTC
Modified:
head/sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c
head/sys/dev/hyperv/vmbus/hv_vmbus_priv.h
Modified: head/sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c
==============================================================================
--- head/sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c Thu Mar 24 01:12:28
2016 (r297220)
+++ head/sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c Thu Mar 24 02:15:23
2016 (r297221)
@@ -204,7 +204,8 @@ hv_vmbus_isr(struct trapframe *frame)
msg = (hv_vmbus_message*) page_addr + HV_VMBUS_MESSAGE_SINT;
if (msg->header.message_type != HV_MESSAGE_TYPE_NONE) {
- taskqueue_enqueue(taskqueue_fast,
&hv_vmbus_g_context.hv_msg_task[cpu]);
+ taskqueue_enqueue(hv_vmbus_g_context.hv_msg_tq[cpu],
+ &hv_vmbus_g_context.hv_msg_task[cpu]);
}
return (FILTER_HANDLED);
@@ -531,9 +532,17 @@ vmbus_bus_init(void)
"hvevent%d", j);
/*
- * Setup tasks to handle msg
+ * Setup per-cpu tasks and taskqueues to handle msg.
*/
- TASK_INIT(&hv_vmbus_g_context.hv_msg_task[j], 0,
vmbus_msg_swintr, (void *)(long)j);
+ hv_vmbus_g_context.hv_msg_tq[j] = taskqueue_create_fast(
+ "hyperv msg", M_WAITOK, taskqueue_thread_enqueue,
+ &hv_vmbus_g_context.hv_msg_tq[j]);
+ CPU_SETOF(j, &cpu_mask);
+ taskqueue_start_threads_cpuset(&hv_vmbus_g_context.hv_msg_tq[j],
+ 1, PI_NET, &cpu_mask, "hvmsg%d", j);
+ TASK_INIT(&hv_vmbus_g_context.hv_msg_task[j], 0,
+ vmbus_msg_swintr, (void *)(long)j);
+
/*
* Prepare the per cpu msg and event pages to be called on each
cpu.
*/
Modified: head/sys/dev/hyperv/vmbus/hv_vmbus_priv.h
==============================================================================
--- head/sys/dev/hyperv/vmbus/hv_vmbus_priv.h Thu Mar 24 01:12:28 2016
(r297220)
+++ head/sys/dev/hyperv/vmbus/hv_vmbus_priv.h Thu Mar 24 02:15:23 2016
(r297221)
@@ -205,6 +205,7 @@ typedef struct {
* event and msg handling.
*/
struct taskqueue *hv_event_queue[MAXCPU];
+ struct taskqueue *hv_msg_tq[MAXCPU];
struct task hv_msg_task[MAXCPU];
/*
* Host use this vector to intrrupt guest for vmbus channel
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