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io_uring: don't free request to slab

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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 <haoxu@linux.alibaba.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/20210825175856.194299-1-haoxu@linux.alibaba.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Hao Xu 2021-08-26 01:58:56 +08:00 committed by Jens Axboe
parent aaa4db12ef
commit 0c6e1d7fd5
1 changed files with 1 additions and 1 deletions
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2
fs/io_uring.c
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@ -6889,7 +6889,7 @@ 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 */