[Xen-changelog] [xen master] x86/vmx: enable PML by default

[patchbot@xxxxxxx]

commit 484c14b7254e8d8936c05e3c28e332ea825c0155
Author:     Kai Huang <kai.huang@xxxxxxxxxxxxxxx>
AuthorDate: Wed Dec 2 15:20:19 2015 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Dec 2 15:20:19 2015 +0100

    x86/vmx: enable PML by default
    
    Since PML series were merged (but disabled by default) we have conducted 
lots of
    PML tests (live migration, GUI display) and PML has been working fine, 
therefore
    turn it on by default.
    
    Document of PML command line is adjusted accordingly as well.
    
    Signed-off-by: Kai Huang <kai.huang@xxxxxxxxxxxxxxx>
    Tested-by: Robert Hu <robert.hu@xxxxxxxxx>
    Tested-by: Xudong Hao <xudong.hao@xxxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Tested-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>
---
 docs/misc/xen-command-line.markdown |    2 +-
 xen/arch/x86/hvm/vmx/vmcs.c         |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/misc/xen-command-line.markdown 
b/docs/misc/xen-command-line.markdown
index c103894..47d148a 100644
--- a/docs/misc/xen-command-line.markdown
+++ b/docs/misc/xen-command-line.markdown
@@ -715,7 +715,7 @@ Controls EPT related features.
 
 > `pml`
 
-> Default: `false`
+> Default: `true`
 
 >> PML is a new hardware feature in Intel's Broadwell Server and further
 >> platforms which reduces hypervisor overhead of log-dirty mechanism by
diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index 7a7896e..dbf284d 100644
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -64,7 +64,7 @@ integer_param("ple_gap", ple_gap);
 static unsigned int __read_mostly ple_window = 4096;
 integer_param("ple_window", ple_window);
 
-static bool_t __read_mostly opt_pml_enabled = 0;
+static bool_t __read_mostly opt_pml_enabled = 1;
 static s8 __read_mostly opt_ept_ad = -1;
 
 /*
--
generated by git-patchbot for /home/xen/git/xen.git#master

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