summaryrefslogtreecommitdiffstats
path: root/io_uring/rw.c
diff options
context:
space:
mode:
authorJens Axboe <axboe@kernel.dk>2024-11-03 16:46:07 +0100
committerJens Axboe <axboe@kernel.dk>2024-11-06 21:55:36 +0100
commit6f94cbc29adacc15007c5a16295052e674099282 (patch)
treee7cd3fa78367dedba9c456a43e871af6a7250dca /io_uring/rw.c
parentio_uring/rsrc: encode node type and ctx together (diff)
downloadlinux-6f94cbc29adacc15007c5a16295052e674099282.tar.xz
linux-6f94cbc29adacc15007c5a16295052e674099282.zip
io_uring/rsrc: split io_kiocb node type assignments
Currently the io_rsrc_node assignment in io_kiocb is an array of two pointers, as two nodes may be assigned to a request - one file node, and one buffer node. However, the buffer node can co-exist with the provided buffers, as currently it's not supported to use both provided and registered buffers at the same time. This crucially brings struct io_kiocb down to 4 cache lines again, as before it spilled into the 5th cacheline. Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/rw.c')
-rw-r--r--io_uring/rw.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/io_uring/rw.c b/io_uring/rw.c
index 1ea6be2ccc90..144730344c0f 100644
--- a/io_uring/rw.c
+++ b/io_uring/rw.c
@@ -341,7 +341,8 @@ static int io_prep_rw_fixed(struct io_kiocb *req, const struct io_uring_sqe *sqe
node = io_rsrc_node_lookup(&ctx->buf_table, req->buf_index);
if (!node)
return -EFAULT;
- io_req_assign_rsrc_node(req, node);
+ io_req_assign_rsrc_node(&req->buf_node, node);
+ req->flags |= REQ_F_BUF_NODE;
io = req->async_data;
ret = io_import_fixed(ddir, &io->iter, node->buf, rw->addr, rw->len);