Prereq: x86: slightly reduce Meltdown band-aid overhead (https://lists.xenproject.org/archives/html/xen-devel/2018-01/msg01609.html)
The overall effect of this series is smaller than that of the single patch above (up to 1% in my measurements, but again instead of the almost 40% loss of performance George has seen that system showed a 10-13% decline "only"), but perhaps still worth considering. 1: remove CR reads from exit-to-guest path 2: eliminate most XPTI entry/exit code when it's not in use 3: re-organize toggle_guest_*() 4: avoid double CR3 reload when switching to guest user mode Signed-off-by: Jan Beulich <jbeul...@suse.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
