The following changes since commit fb34110eac72f01651543095656693f196d895ca: Merge branch 'div-by-zero' of https://github.com/vincentkfu/fio (2020-02-24 08:23:52 -0700) are available in the Git repository at: git://git.kernel.dk/fio.git master for you to fetch changes up to 58d3994d9be0783990af82571cea819b499d526c: io_uring: we should not need two write barriers for SQ updates (2020-02-26 19:54:12 -0700) ---------------------------------------------------------------- Eric Sandeen (1): fio: remove duplicate global definition of tsc_reliable Jens Axboe (1): io_uring: we should not need two write barriers for SQ updates engines/io_uring.c | 2 -- t/arch.c | 1 - t/io_uring.c | 2 -- 3 files changed, 5 deletions(-) --- Diff of recent changes: diff --git a/engines/io_uring.c b/engines/io_uring.c index 5e59f975..1efc6cff 100644 --- a/engines/io_uring.c +++ b/engines/io_uring.c @@ -374,8 +374,6 @@ static enum fio_q_status fio_ioring_queue(struct thread_data *td, if (next_tail == *ring->head) return FIO_Q_BUSY; - /* ensure sqe stores are ordered with tail update */ - write_barrier(); if (o->cmdprio_percentage) fio_ioring_prio_prep(td, io_u); ring->array[tail & ld->sq_ring_mask] = io_u->index; diff --git a/t/arch.c b/t/arch.c index bd28a848..a72cef3a 100644 --- a/t/arch.c +++ b/t/arch.c @@ -1,5 +1,4 @@ #include "../arch/arch.h" unsigned long arch_flags = 0; -bool tsc_reliable; int arch_random; diff --git a/t/io_uring.c b/t/io_uring.c index 55b75f6e..e84a2b6b 100644 --- a/t/io_uring.c +++ b/t/io_uring.c @@ -216,8 +216,6 @@ static int prep_more_ios(struct submitter *s, int max_ios) } while (prepped < max_ios); if (*ring->tail != tail) { - /* order tail store with writes to sqes above */ - write_barrier(); *ring->tail = tail; write_barrier(); }
