src/patches/suse-2.6.27.31/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 --- sle11-2009-06-29.orig/drivers/xen/balloon/balloon.c 2009-06-29 15:30:29.000000000 +0200
   9 +++ sle11-2009-06-29/drivers/xen/balloon/balloon.c      2009-06-29 15:44:49.000000000 +0200
  10 @@ -194,7 +194,7 @@ static unsigned long current_target(void
  11         return target;
  12  }
  13
  14 -static unsigned long minimum_target(void)
  15 +unsigned long balloon_minimum_target(void)
  16  {
  17  #ifndef CONFIG_XEN
  18  #define max_pfn num_physpages
  19 @@ -406,7 +406,7 @@ static void balloon_process(struct work_
  20  void balloon_set_new_target(unsigned long target)
  21  {
  22         /* No need for lock. Not read-modify-write updates. */
  23 -       bs.target_pages = max(target, minimum_target());
  24 +       bs.target_pages = max(target, balloon_minimum_target());
  25         schedule_work(&balloon_worker);
  26  }
  27
  28 @@ -481,10 +481,13 @@ static int balloon_read(char *page, char
  29                 page,
  30                 "Current allocation: %8lu kB\n"
  31                 "Requested target:   %8lu kB\n"
  32 +               "Minimum target:     %8lu kB\n"
  33 +               "Maximum target:     %8lu kB\n"
  34                 "Low-mem balloon:    %8lu kB\n"
  35                 "High-mem balloon:   %8lu kB\n"
  36                 "Driver pages:       %8lu kB\n",
  37                 PAGES2KB(bs.current_pages), PAGES2KB(bs.target_pages),
  38 +               PAGES2KB(balloon_minimum_target()), PAGES2KB(num_physpages),
  39                 PAGES2KB(bs.balloon_low), PAGES2KB(bs.balloon_high),
  40                 PAGES2KB(bs.driver_pages));
  41
  42 --- sle11-2009-06-29.orig/drivers/xen/balloon/common.h  2009-06-29 15:24:00.000000000 +0200
  43 +++ sle11-2009-06-29/drivers/xen/balloon/common.h       2009-06-29 15:43:29.000000000 +0200
  44 @@ -52,5 +52,6 @@ int balloon_sysfs_init(void);
  45  void balloon_sysfs_exit(void);
  46
  47  void balloon_set_new_target(unsigned long target);
  48 +unsigned long balloon_minimum_target(void);
  49
  50  #endif /* __XEN_BALLOON_COMMON_H__ */
  51 --- sle11-2009-06-29.orig/drivers/xen/balloon/sysfs.c   2009-06-29 15:31:06.000000000 +0200
  52 +++ sle11-2009-06-29/drivers/xen/balloon/sysfs.c        2009-06-29 15:43:35.000000000 +0200
  53 @@ -31,6 +31,7 @@
  54  #include <linux/capability.h>
  55  #include <linux/errno.h>
  56  #include <linux/init.h>
  57 +#include <linux/mm.h>
  58  #include <linux/stat.h>
  59  #include <linux/string.h>
  60  #include <linux/sysdev.h>
  61 @@ -53,6 +54,8 @@
  62         static SYSDEV_ATTR(name, S_IRUGO, show_##name, NULL)
  63
  64  BALLOON_SHOW(current_kb, "%lu\n", PAGES2KB(bs.current_pages));
  65 +BALLOON_SHOW(min_kb, "%lu\n", PAGES2KB(balloon_minimum_target()));
  66 +BALLOON_SHOW(max_kb, "%lu\n", PAGES2KB(num_physpages));
  67  BALLOON_SHOW(low_kb, "%lu\n", PAGES2KB(bs.balloon_low));
  68  BALLOON_SHOW(high_kb, "%lu\n", PAGES2KB(bs.balloon_high));
  69  BALLOON_SHOW(driver_kb, "%lu\n", PAGES2KB(bs.driver_pages));
  70 @@ -94,6 +97,8 @@ static struct sysdev_attribute *balloon_
  71
  72  static struct attribute *balloon_info_attrs[] = {
  73         &attr_current_kb.attr,
  74 +       &attr_min_kb.attr,
  75 +       &attr_max_kb.attr,
  76         &attr_low_kb.attr,
  77         &attr_high_kb.attr,
  78         &attr_driver_kb.attr,