[Xen-devel] [PATCH] re-enable tmem by default in xen-unstable

[Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>]

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>


diff -r 7ee8bb40200a xen/common/tmem_xen.c
--- a/xen/common/tmem_xen.c     Thu Apr 15 19:11:16 2010 +0100
+++ b/xen/common/tmem_xen.c     Mon Apr 19 08:30:11 2010 -0600
@@ -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;

Attachment: tmem-enable.patch
Description: Binary data

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