[Xen-devel] [PATCH 3/4] xen/balloon: Clarify credit calculation

[Daniel Kiper <dkiper@xxxxxxxxxxxx>]

Move credit calculation to current_target()
and rename it to current_credit().

Signed-off-by: Daniel Kiper <dkiper@xxxxxxxxxxxx>
---
 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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