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[Xen-changelog] [xen-unstable] tmem: (re-)enable by default

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1271694043 -3600
# Node ID 0be8bd195318744e2181235ae31d14c9235cc467
# Parent  f1313dd68da4077ccd4f5530a7bc79d649bdffab
tmem: (re-)enable by default

Late in the 4.0 release it was discovered that certain order>0
allocations could fail and had no fallback.  This conflicted with
tmem especially when combined with aggressive ballooning.
A hack-y workaround patch was added in time for 4.0 that has
reduced (but not completely eliminated) the problem but
tmem was left disabled-by-default for the 4.0 release.

Re-enable it in xen-unstable by default to help identify cases
where the workaround is insufficient.   Tmem can be
disabled with the no-tmem Xen boot option.  Please report
failures (that are fixed with the no-tmem option) to me.

Signed-off-by: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
 xen/common/tmem_xen.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r f1313dd68da4 -r 0be8bd195318 xen/common/tmem_xen.c
--- a/xen/common/tmem_xen.c     Mon Apr 19 11:47:59 2010 +0100
+++ b/xen/common/tmem_xen.c     Mon Apr 19 17:20:43 2010 +0100
@@ -14,7 +14,7 @@
 #define EXPORT /* indicates code other modules are dependent upon */
-EXPORT int opt_tmem = 0;
+EXPORT int opt_tmem = 1;
 boolean_param("tmem", opt_tmem);
 EXPORT int opt_tmem_compress = 0;

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