[Pkg-libvirt-commits] [libguestfs] 06/14: launch: direct: Use -cpu host when using KVM on x86.

[Hilko Bengen]

This is an automated email from the git hooks/post-receive script.

bengen pushed a commit to annotated tag upstream/1.27.21
in repository libguestfs.

commit 2fe74642f4b2971ea279374a72ddedde733f5e44
Author: Richard W.M. Jones <rjones at redhat.com>
Date:   Thu Jul 3 11:48:49 2014 +0100

    launch: direct: Use -cpu host when using KVM on x86.
    
    This is the same as what the libvirt backend does.
---
 src/launch-direct.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/launch-direct.c b/src/launch-direct.c
index 682b98e..bb73d19 100644
--- a/src/launch-direct.c
+++ b/src/launch-direct.c
@@ -418,6 +418,18 @@ launch_direct (guestfs_h *g, void *datav, const char *arg)
    */
   has_kvm = is_openable (g, "/dev/kvm", O_RDWR|O_CLOEXEC);
 
+#if !defined(__arm__)
+  /* It is faster to pass the CPU host model to the appliance,
+   * allowing maximum speed for things like checksums, encryption.
+   * Only do this with KVM.  It is broken in subtle ways on TCG, and
+   * fairly pointless anyway.
+   */
+  if (has_kvm && !force_tcg) {
+    ADD_CMDLINE ("-cpu");
+    ADD_CMDLINE ("host");
+  }
+#endif
+
   /* The qemu -machine option (added 2010-12) is a bit more sane
    * since it falls back through various different acceleration
    * modes, so try that first (thanks Markus Armbruster).

-- 
Alioth's /usr/local/bin/git-commit-notice on /srv/git.debian.org/git/pkg-libvirt/libguestfs.git