Just like what is being done on the recv side, if we only map a single
segment, then use ITER_UBUF for mapping it. That's more efficient than
using an ITER_IOVEC.
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
---
io_uring/net.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/io_uring/net.c b/io_uring/net.c
index 594490a1389b..668e2fda95cc 100644
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -617,13 +617,22 @@ int io_send(struct io_kiocb *req, unsigned int issue_flags)
if (unlikely(ret < 0))
return ret;
- sr->len = arg.out_len;
- iov_iter_init(&kmsg->msg.msg_iter, ITER_SOURCE, arg.iovs, ret,
- arg.out_len);
if (arg.iovs != &kmsg->fast_iov && arg.iovs != kmsg->free_iov) {
kmsg->free_iov_nr = ret;
kmsg->free_iov = arg.iovs;
}
+ sr->len = arg.out_len;
+
+ if (ret == 1) {
+ sr->buf = arg.iovs[0].iov_base;
+ ret = import_ubuf(ITER_SOURCE, sr->buf, sr->len,
+ &kmsg->msg.msg_iter);
+ if (unlikely(ret))
+ return ret;
+ } else {
+ iov_iter_init(&kmsg->msg.msg_iter, ITER_SOURCE,
+ arg.iovs, ret, arg.out_len);
+ }
}
/*
--
2.43.0
