This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / linux / vs_sched.h

diff --git a/include/linux/vs_sched.h b/include/linux/vs_sched.h
new file mode 100644 (file)
index 0000000..0eb1ee6
--- /dev/null
+++ b/include/linux/vs_sched.h
@@ -0,0 +1,73 @@
+#ifndef _VX_VS_SCHED_H
+#define _VX_VS_SCHED_H
+
+
+#include "vserver/sched.h"
+
+
+#define VAVAVOOM_RATIO          50
+
+#define MAX_PRIO_BIAS           20
+#define MIN_PRIO_BIAS          -20
+
+
+static inline int vx_tokens_avail(struct vx_info *vxi)
+{
+       return atomic_read(&vxi->sched.tokens);
+}
+
+static inline void vx_consume_token(struct vx_info *vxi)
+{
+       atomic_dec(&vxi->sched.tokens);
+}
+
+static inline int vx_need_resched(struct task_struct *p)
+{
+#ifdef CONFIG_VSERVER_HARDCPU
+       struct vx_info *vxi = p->vx_info;
+#endif
+       int slice = --p->time_slice;
+
+#ifdef CONFIG_VSERVER_HARDCPU
+       if (vxi) {
+               int tokens;
+
+               if ((tokens = vx_tokens_avail(vxi)) > 0)
+                       vx_consume_token(vxi);
+               /* for tokens > 0, one token was consumed */
+               if (tokens < 2)
+                       return 1;
+       }
+#endif
+       return (slice == 0);
+}
+
+
+static inline void vx_onhold_inc(struct vx_info *vxi)
+{
+       int onhold = atomic_read(&vxi->cvirt.nr_onhold);
+
+       atomic_inc(&vxi->cvirt.nr_onhold);
+       if (!onhold)
+               vxi->cvirt.onhold_last = jiffies;
+}
+
+static inline void __vx_onhold_update(struct vx_info *vxi)
+{
+       int cpu = smp_processor_id();
+       uint32_t now = jiffies;
+       uint32_t delta = now - vxi->cvirt.onhold_last;
+
+       vxi->cvirt.onhold_last = now;
+       vxi->sched.cpu[cpu].hold_ticks += delta;
+}
+
+static inline void vx_onhold_dec(struct vx_info *vxi)
+{
+       if (atomic_dec_and_test(&vxi->cvirt.nr_onhold))
+               __vx_onhold_update(vxi);
+}
+
+#else
+#warning duplicate inclusion
+#endif