Daniel Kiper
2011-Mar-28 09:34 UTC
[Xen-devel] [PATCH 3/4] xen/balloon: Clarify credit calculation
Move credit calculation to current_target()
and rename it to current_credit().
Signed-off-by: Daniel Kiper <dkiper@net-space.pl>
---
drivers/xen/balloon.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 42a0ba0..a6d8e59 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -193,7 +193,7 @@ static enum bp_state update_schedule(enum bp_state state)
return BP_EAGAIN;
}
-static unsigned long current_target(void)
+static long current_credit(void)
{
unsigned long target = balloon_stats.target_pages;
@@ -202,7 +202,7 @@ static unsigned long current_target(void)
balloon_stats.balloon_low +
balloon_stats.balloon_high);
- return target;
+ return target - balloon_stats.current_pages;
}
static enum bp_state increase_reservation(unsigned long nr_pages)
@@ -337,7 +337,7 @@ static void balloon_process(struct work_struct *work)
mutex_lock(&balloon_mutex);
do {
- credit = current_target() - balloon_stats.current_pages;
+ credit = current_credit();
if (credit > 0)
state = increase_reservation(credit);
@@ -420,7 +420,7 @@ void free_xenballooned_pages(int nr_pages, struct page**
pages)
}
/* The balloon may be too large now. Shrink it if needed. */
- if (current_target() != balloon_stats.current_pages)
+ if (current_credit())
schedule_delayed_work(&balloon_worker, 0);
mutex_unlock(&balloon_mutex);
--
1.5.6.5
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