[PATCH for-5.15 v2] io_uring: don't free request to slab
From: Hao Xu <hidden>
Date: 2021-08-25 17:59:04
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
It's not necessary to free the request back to slab when we fail to get sqe, just move it to state->free_list. Signed-off-by: Hao Xu <redacted> --- fs/io_uring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 74b606990d7e..c53b084668fc 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c@@ -6899,7 +6899,7 @@ static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr) } sqe = io_get_sqe(ctx); if (unlikely(!sqe)) { - kmem_cache_free(req_cachep, req); + list_add(&req->inflight_entry, &ctx->submit_state.free_list); break; } /* will complete beyond this point, count as submitted */
--
2.24.4