Initial support for explicit write barriers
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/io_u.c b/io_u.c
index baa961b..6d539a0 100644
--- a/io_u.c
+++ b/io_u.c
@@ -501,6 +501,17 @@
return td->rwmix_ddir;
}
+static void set_rw_ddir(struct thread_data *td, struct io_u *io_u)
+{
+ io_u->ddir = get_rw_ddir(td);
+
+ if (io_u->ddir == DDIR_WRITE && (td->io_ops->flags & FIO_BARRIER) &&
+ td->o.barrier_blocks &&
+ !(td->io_issues[DDIR_WRITE] % td->o.barrier_blocks) &&
+ td->io_issues[DDIR_WRITE])
+ io_u->flags |= IO_U_F_BARRIER;
+}
+
void put_file_log(struct thread_data *td, struct fio_file *f)
{
int ret = put_file(td, f);
@@ -560,7 +571,7 @@
if (td->io_ops->flags & FIO_NOIO)
goto out;
- io_u->ddir = get_rw_ddir(td);
+ set_rw_ddir(td, io_u);
/*
* fsync() or fdatasync() or trim etc, we are done
@@ -963,7 +974,7 @@
if (io_u) {
assert(io_u->flags & IO_U_F_FREE);
io_u->flags &= ~(IO_U_F_FREE | IO_U_F_FREE_DEF);
- io_u->flags &= ~IO_U_F_TRIMMED;
+ io_u->flags &= ~(IO_U_F_TRIMMED | IO_U_F_BARRIER);
io_u->error = 0;
flist_del(&io_u->list);