Re: __get_user slower than get_user (was Re: [RFC PATCH V3 0/5] Hi:)

2019-01-08 Thread Linus Torvalds
On Tue, Jan 8, 2019 at 8:31 PM Michael S. Tsirkin wrote: > > Linus, given that you just changed all users of access_ok anyway, do > you still think that the access_ok() conversion to return a speculation > sanitized pointer or NULL is too big a conversion? I didn't actually change a single access

__get_user slower than get_user (was Re: [RFC PATCH V3 0/5] Hi:)

2019-01-08 Thread Michael S. Tsirkin
On Mon, Jan 07, 2019 at 02:44:24PM -0800, Dan Williams wrote: > On Mon, Jan 7, 2019 at 2:25 PM Michael S. Tsirkin wrote: > > > > On Mon, Jan 07, 2019 at 01:39:15PM -0800, Dan Williams wrote: > > > On Mon, Jan 7, 2019 at 6:11 AM Michael S. Tsirkin wrote: > > > > > > > > On Sun, Jan 06, 2019 at 11: