[Xen-changelog] [xen-unstable] xend: Do not give up auto-ballooning if ballooning is proceeding okay.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1181553414 -3600
# Node ID 6f06bd06ef473726b4132e6fe95309fce6963fd5
# Parent  a43a03d53781e159da41f79d8cc615905b95ab80
xend: Do not give up auto-ballooning if ballooning is proceeding okay.
Under a loaded system, don't give up ballooning dom0 unless it's not
responding at all.

Signed-off-by: Ryan Scott <ryan.scott@xxxxxxx>
---
 tools/python/xen/xend/balloon.py |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletion(-)

diff -r a43a03d53781 -r 6f06bd06ef47 tools/python/xen/xend/balloon.py
--- a/tools/python/xen/xend/balloon.py  Mon Jun 11 10:14:54 2007 +0100
+++ b/tools/python/xen/xend/balloon.py  Mon Jun 11 10:16:54 2007 +0100
@@ -102,6 +102,7 @@ def free(need_mem):
         retries = 0
         sleep_time = SLEEP_TIME_GROWTH
         last_new_alloc = None
+        last_free = None
         rlimit = RETRY_LIMIT
         while retries < rlimit:
             physinfo = xc.physinfo()
@@ -140,7 +141,9 @@ def free(need_mem):
             time.sleep(sleep_time)
             if retries < 2 * RETRY_LIMIT:
                 sleep_time += SLEEP_TIME_GROWTH
-            retries += 1
+            if last_free != None and last_free >= free_mem + scrub_mem:
+                retries += 1
+            last_free = free_mem + scrub_mem
 
         # Not enough memory; diagnose the problem.
         if dom0_min_mem == 0:

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