>>> On 24.09.18 at 14:18, <[email protected]> wrote: >> From: Jan Beulich [mailto:[email protected]] >> Sent: 24 September 2018 13:16 >> >> All writes to the ring occur strictly before the update of the tail >> pointer > > ...unless the compiler decides to re-order. There's no barrier.
But there is (an implied) one, inside writel() (due to the "volatile"). Everything ahead of the writel() invocation may be stored in any order. Jan _______________________________________________ Xen-devel mailing list [email protected] https://lists.xenproject.org/mailman/listinfo/xen-devel
