From: Carl Shapiro <cshapiro@google.com>
Date: Wed, 29 Sep 2010 03:30:42 +0000 (-0700)
Subject: After trimming, set the footprint to the number of pages in use.
X-Git-Tag: android-x86-4.0-r1~164^2~18^2~12^2
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=718509c35413c01a866c848d019d8ca28b425bf6;p=android-x86%2Fdalvik.git

After trimming, set the footprint to the number of pages in use.

A trim can decrease the an mspace footprint but it will not decrease
its max footprint.  We need to decrease the max footprint to make any
pages recovered by a trim available to external allocations.

By setting the ideal footprint after a trim we lift any soft limit in
effect and make the mspace footprint and max footprints equal.

Change-Id: Ia6eb99634ce1d732b417a90291b110d1fc46c2e3
---

diff --git a/vm/alloc/HeapSource.c b/vm/alloc/HeapSource.c
index 25e0125f2..46b1c78f3 100644
--- a/vm/alloc/HeapSource.c
+++ b/vm/alloc/HeapSource.c
@@ -1685,6 +1685,7 @@ static bool externalAllocPossible(const HeapSource *hs, size_t n)
      * Try trimming the mspace to reclaim unused pages.
      */
     dvmHeapSourceTrim(bytesTrimmed, NELEM(bytesTrimmed));
+    snapIdealFootprint();
     if (externalBytesAvailable(hs, n)) {
         return true;
     }