Re: [Xen-devel] [PATCH] x86: Adjust rdtsc inline assembly

2015-02-18 Thread Andrew Cooper
On 18/02/15 13:11, Jan Beulich wrote: On 18.02.15 at 13:25, wrote: >> The single use of the old rdtsc() in emulate_privileged_op() is altered to >> use >> the new rdtsc() and the rdmsr_writeback path to set eax/edx appropriately. > I'm not entirely sure about this one - the current code sure

Re: [Xen-devel] [PATCH] x86: Adjust rdtsc inline assembly

2015-02-18 Thread Jan Beulich
>>> On 18.02.15 at 13:25, wrote: > The single use of the old rdtsc() in emulate_privileged_op() is altered to use > the new rdtsc() and the rdmsr_writeback path to set eax/edx appropriately. I'm not entirely sure about this one - the current code surely is slightly faster than the replacement. Qu