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This patch series includes a series of bugs related to p2m, ept, and PoD code which were found as part of our XenServer product testing. Each of these fixes actual bugs, and the 3.4-based version of the patch has been tested thoroughly. (There may be bugs in porting the patches, but most of them are simple enough as to make it unlikely.) Each patch is conceptually independent, so they can each

...Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com> diff -r 3caed2112c65 -r 56b32e6fd315 xen/arch/x86/mm/hap/p2m-ept.c --- a/xen/arch/x86/mm/hap/p2m-ept.c Tue Mar 15 10:14:27 2011 +0000 +++ b/xen/arch/x86/mm/hap/p2m-ept.c Tue Mar 15 15:41:17 2011 +0000 @@ -374,7 +374,9 @@ needs_sync = 0; /* If we''re replacing a non-leaf entry with a leaf entry (1GiB or 2MiB), - * the intermediate tables will be freed below after the ept flush */ + * the intermediate tables will be freed below after the ept flush + * + * Read-then-write is OK...

From: Zhang Xiantao <xiantao.zhang@intel.com> With virtual EPT support, L1 hyerpvisor can use EPT hardware for L2 guest''s memory virtualization. In this way, L2 guest''s performance can be improved sharply. According to our testing, some benchmarks can show > 5x performance gain. Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com> Zhang Xiantao (11):