Remove non-multithreaded OS option. Change VM creation to be fully asynchronous....

[palacios.git] / linux_module / palacios-stubs.c

diff --git a/linux_module/palacios-stubs.c b/linux_module/palacios-stubs.c
index 05789fb..8eeeb7d 100644 (file)
--- a/linux_module/palacios-stubs.c
+++ b/linux_module/palacios-stubs.c
@@ -180,7 +180,7 @@ static int lnx_thread_target(void * arg) {
 /**
  * Creates a kernel thread.
  */
-static void 
+static void *
 palacios_start_kernel_thread(
        int (*fn)               (void * arg),
        void *                  arg,
@@ -192,8 +192,7 @@ palacios_start_kernel_thread(
     thread_info->arg = arg;
     thread_info->name = thread_name;
 
-    kthread_run( lnx_thread_target, thread_info, thread_name );
-    return;
+    return kthread_run( lnx_thread_target, thread_info, thread_name );
 }
 
 
@@ -220,12 +219,37 @@ palacios_start_thread_on_cpu(int cpu_id,
        return NULL;
     }
 
-    kthread_bind(thread, cpu_id);
+    set_cpus_allowed_ptr(thread, cpumask_of(cpu_id));
     wake_up_process(thread);
 
     return thread;
 }
 
+
+/**
+ * Rebind a kernel thread to the specified CPU
+ * The thread will be running on target CPU on return
+ * non-zero return means failure
+ */
+static int
+palacios_move_thread_to_cpu(int new_cpu_id, 
+                           void * thread_ptr) {
+    struct task_struct * thread = (struct task_struct *)thread_ptr;
+
+    printk("Moving thread (%p) to cpu %d\n", thread, new_cpu_id);
+
+    if (thread == NULL) {
+       thread = current;
+    }
+
+    /*
+     * Bind to the specified CPU.  When this call returns,
+     * the thread should be running on the target CPU.
+     */
+    return set_cpus_allowed_ptr(thread, cpumask_of(new_cpu_id));
+}
+
+
 /**
  * Returns the CPU ID that the caller is running on.
  */
@@ -461,6 +485,7 @@ static struct v3_os_hooks palacios_os_hooks = {
        .interrupt_cpu          = palacios_interrupt_cpu,
        .call_on_cpu            = palacios_xcall,
        .start_thread_on_cpu    = palacios_start_thread_on_cpu,
+       .move_thread_to_cpu = palacios_move_thread_to_cpu,
 };