On 28/08/15 16:41, "Anshul Makkar anshul.makkar"@citrix.com wrote: > From: anshulma <[email protected]> > > Sandybridge or earlier processors don't have huge page support for > IOTLB which leads to fallback on 4k pages and causes performance issues. > > Shared EPT will be disabled only if the user has not provided explicit > choice on the command line. > > Signed-off-by: Anshul Makkar <[email protected]>
As a note concerning the performance issues, for some IO workloads, this nets a 40% throughput improvement. We did not observe any IO workloads which had a worse performance as a result of disabling shared ept. Reviewed-by: Andrew Cooper <[email protected]> ~Andrew _______________________________________________ Xen-devel mailing list [email protected] http://lists.xen.org/xen-devel
