Fix for when slice has been idle for a long time

diff --git a/linux-2.6-210-vserver-cpu-sched.patch b/linux-2.6-210-vserver-cpu-sched.patch
index 3ecfd30..5f2054b 100644 (file)
--- a/linux-2.6-210-vserver-cpu-sched.patch
+++ b/linux-2.6-210-vserver-cpu-sched.patch
@@ -1,7 +1,27 @@
 diff -Nurp linux-2.6.22-200/kernel/vserver/sched.c linux-2.6.22-210/kernel/vserver/sched.c
---- linux-2.6.22-200/kernel/vserver/sched.c    2008-03-31 17:57:47.000000000 -0400
-+++ linux-2.6.22-210/kernel/vserver/sched.c    2008-03-31 18:22:46.000000000 -0400
-@@ -91,7 +91,7 @@ int vx_tokens_recalc(struct _vx_sched_pc
+--- linux-2.6.22-200/kernel/vserver/sched.c    2008-04-02 14:03:20.000000000 -0400
++++ linux-2.6.22-210/kernel/vserver/sched.c    2008-04-02 15:53:44.000000000 -0400
+@@ -18,7 +18,6 @@
+ 
+ #include <asm/uaccess.h>
+ 
+-
+ #define vxd_check_range(val, min, max) do {           \
+       vxlprintk((val < min) || (val > max),           \
+               "check_range(%ld,%ld,%ld)",             \
+@@ -78,6 +77,11 @@ int vx_tokens_recalc(struct _vx_sched_pc
+       /* how much time did pass? */
+       delta = *norm_time - sched_pc->norm_time;
+       vxd_check_range(delta, 0, INT_MAX);
++      if (delta < 0) {
++              /* vserver is new or idle for a really long time */
++              sched_pc->norm_time = *norm_time;
++              delta = 0;
++      }
+ 
+       if (delta >= sched_pc->interval[0]) {
+               long tokens, integral;
+@@ -91,7 +97,7 @@ int vx_tokens_recalc(struct _vx_sched_pc
                vxd_check_range(delta_min[0], 0, sched_pc->interval[0]);
  #endif
                /* advance time */
@@ -10,7 +30,21 @@ diff -Nurp linux-2.6.22-200/kernel/vserver/sched.c linux-2.6.22-210/kernel/vserv
  
                /* add tokens */
                sched_pc->tokens += tokens;
-@@ -161,10 +161,12 @@ on_hold:
+@@ -106,7 +112,12 @@ int vx_tokens_recalc(struct _vx_sched_pc
+       /* how much was the idle skip? */
+       delta = *idle_time - sched_pc->idle_time;
+       vxd_check_range(delta, 0, INT_MAX);
+-
++      if (delta < 0) {
++              /* vserver is new or idle for a really long time */
++              sched_pc->idle_time = *idle_time;
++              delta = 0;
++      }
++      
+       if (delta >= sched_pc->interval[1]) {
+               long tokens, integral;
+ 
+@@ -161,10 +173,12 @@ on_hold:
        /* next interval? */
        if (!sched_pc->fill_rate[0])
                delta_min[0] = HZ;
@@ -27,7 +61,7 @@ diff -Nurp linux-2.6.22-200/kernel/vserver/sched.c linux-2.6.22-210/kernel/vserv
                delta_min[0] = sched_pc->interval[0] - delta_min[0];
        vxd_check_range(delta_min[0], 0, INT_MAX);
  
-@@ -175,10 +177,12 @@ on_hold:
+@@ -175,10 +189,12 @@ on_hold:
        /* next interval? */
        if (!sched_pc->fill_rate[1])
                delta_min[1] = HZ;