On Thu, 28 Apr 2011 19:46:00 -0700 Andi Kleen <andi@xxxxxxxxxxxxxx> wrote: > Avi Kivity <avi@xxxxxxxxxx> writes: > > > > Good optimization. copy_from_user() really isn't optimized for short > > buffers, I expect much of the improvement comes from that. > > Actually it is equivalent to get_user for the lenghts supported by > get_user, assuming you pass in a constant length. You probably do not. > > -Andi Weird, I actually measured some changes even after dropping other parts than get_user() usage. Only I can guess for that reason is the reduction of some function calls by inlining some functions. Takuya -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
