src/patches/suse-2.6.27.25/patches.xen/xen-balloon-max-target

   1 From: ccoffing@novell.com
   2 Subject: Expose min/max limits of domain ballooning
   3 Patch-mainline: obsolete
   4 References: 152667, 184727
   5
   6 jb: Also added this to the sysfs representation.
   7
   8 Index: head-2008-11-25/drivers/xen/balloon/balloon.c
   9 ===================================================================
  10 --- head-2008-11-25.orig/drivers/xen/balloon/balloon.c  2008-11-25 13:33:56.000000000 +0100
  11 +++ head-2008-11-25/drivers/xen/balloon/balloon.c       2008-11-25 13:34:52.000000000 +0100
  12 @@ -194,7 +194,7 @@ static unsigned long current_target(void
  13         return target;
  14  }
  15
  16 -static unsigned long minimum_target(void)
  17 +unsigned long balloon_minimum_target(void)
  18  {
  19  #ifndef CONFIG_XEN
  20  #define max_pfn num_physpages
  21 @@ -421,7 +421,7 @@ void balloon_set_new_target(unsigned lon
  22  {
  23         /* No need for lock. Not read-modify-write updates. */
  24         bs.hard_limit   = ~0UL;
  25 -       bs.target_pages = max(target, minimum_target());
  26 +       bs.target_pages = max(target, balloon_minimum_target());
  27         schedule_work(&balloon_worker);
  28  }
  29
  30 @@ -496,11 +496,14 @@ static int balloon_read(char *page, char
  31                 page,
  32                 "Current allocation: %8lu kB\n"
  33                 "Requested target:   %8lu kB\n"
  34 +               "Minimum target:     %8lu kB\n"
  35 +               "Maximum target:     %8lu kB\n"
  36                 "Low-mem balloon:    %8lu kB\n"
  37                 "High-mem balloon:   %8lu kB\n"
  38                 "Driver pages:       %8lu kB\n"
  39                 "Xen hard limit:     ",
  40                 PAGES2KB(bs.current_pages), PAGES2KB(bs.target_pages),
  41 +               PAGES2KB(balloon_minimum_target()), PAGES2KB(num_physpages),
  42                 PAGES2KB(bs.balloon_low), PAGES2KB(bs.balloon_high),
  43                 PAGES2KB(bs.driver_pages));
  44
  45 Index: head-2008-11-25/drivers/xen/balloon/common.h
  46 ===================================================================
  47 --- head-2008-11-25.orig/drivers/xen/balloon/common.h   2007-06-12 13:13:44.000000000 +0200
  48 +++ head-2008-11-25/drivers/xen/balloon/common.h        2008-11-25 13:34:52.000000000 +0100
  49 @@ -47,6 +47,7 @@ struct balloon_stats {
  50         unsigned long balloon_high;
  51  };
  52
  53 +extern unsigned long num_physpages;
  54  extern struct balloon_stats balloon_stats;
  55  #define bs balloon_stats
  56
  57 @@ -54,5 +55,6 @@ int balloon_sysfs_init(void);
  58  void balloon_sysfs_exit(void);
  59
  60  void balloon_set_new_target(unsigned long target);
  61 +unsigned long balloon_minimum_target(void);
  62
  63  #endif /* __XEN_BALLOON_COMMON_H__ */
  64 Index: head-2008-11-25/drivers/xen/balloon/sysfs.c
  65 ===================================================================
  66 --- head-2008-11-25.orig/drivers/xen/balloon/sysfs.c    2008-11-25 13:34:32.000000000 +0100
  67 +++ head-2008-11-25/drivers/xen/balloon/sysfs.c 2008-11-25 13:34:52.000000000 +0100
  68 @@ -53,6 +53,8 @@
  69         static SYSDEV_ATTR(name, S_IRUGO, show_##name, NULL)
  70
  71  BALLOON_SHOW(current_kb, "%lu\n", PAGES2KB(bs.current_pages));
  72 +BALLOON_SHOW(min_kb, "%lu\n", PAGES2KB(balloon_minimum_target()));
  73 +BALLOON_SHOW(max_kb, "%lu\n", PAGES2KB(num_physpages));
  74  BALLOON_SHOW(low_kb, "%lu\n", PAGES2KB(bs.balloon_low));
  75  BALLOON_SHOW(high_kb, "%lu\n", PAGES2KB(bs.balloon_high));
  76  BALLOON_SHOW(hard_limit_kb,
  77 @@ -97,6 +99,8 @@ static struct sysdev_attribute *balloon_
  78
  79  static struct attribute *balloon_info_attrs[] = {
  80         &attr_current_kb.attr,
  81 +       &attr_min_kb.attr,
  82 +       &attr_max_kb.attr,
  83         &attr_low_kb.attr,
  84         &attr_high_kb.attr,
  85         &attr_hard_limit_kb.attr,