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authorPavel Begunkov <asml.silence@gmail.com>2021-08-09 20:18:11 +0100
committerJens Axboe <axboe@kernel.dk>2021-08-09 13:47:12 -0600
commit7bd2e29d63ebec4e0b90b89dea928a19aad75bf4 (patch)
treef7714f8c237d53de4b044762b59f51406d1b4940
parentf60d3044cbe617d1b8cd72fd825b489f0bc88a83 (diff)
io_uring: inline struct io_comp_state
Inline struct io_comp_state into struct io_submit_state. They are already coupled tightly, together with mixed responsibilities it only brings confusion having them separately. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/e55bba77426b399e3a2e54e3c6c267c6a0fc4b57.1628536684.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--fs/io_uring.c61
1 files changed, 27 insertions, 34 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 039ef580aabe..d07b70e4a813 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -299,13 +299,6 @@ struct io_sq_data {
#define IO_REQ_CACHE_SIZE 32
#define IO_REQ_ALLOC_BATCH 8
-struct io_comp_state {
- struct io_kiocb *reqs[IO_COMPL_BATCH];
- unsigned int nr;
- /* inline/task_work completion list, under ->uring_lock */
- struct list_head free_list;
-};
-
struct io_submit_link {
struct io_kiocb *head;
struct io_kiocb *last;
@@ -326,7 +319,10 @@ struct io_submit_state {
/*
* Batch completion logic
*/
- struct io_comp_state comp;
+ struct io_kiocb *compl_reqs[IO_COMPL_BATCH];
+ unsigned int compl_nr;
+ /* inline/task_work completion list, under ->uring_lock */
+ struct list_head free_list;
/*
* File reference cache
@@ -1206,7 +1202,7 @@ static struct io_ring_ctx *io_ring_ctx_alloc(struct io_uring_params *p)
INIT_DELAYED_WORK(&ctx->rsrc_put_work, io_rsrc_put_work);
init_llist_head(&ctx->rsrc_put_llist);
INIT_LIST_HEAD(&ctx->tctx_list);
- INIT_LIST_HEAD(&ctx->submit_state.comp.free_list);
+ INIT_LIST_HEAD(&ctx->submit_state.free_list);
INIT_LIST_HEAD(&ctx->locked_free_list);
INIT_DELAYED_WORK(&ctx->fallback_work, io_fallback_req_func);
return ctx;
@@ -1735,10 +1731,10 @@ static void io_preinit_req(struct io_kiocb *req, struct io_ring_ctx *ctx)
}
static void io_flush_cached_locked_reqs(struct io_ring_ctx *ctx,
- struct io_comp_state *cs)
+ struct io_submit_state *state)
{
spin_lock_irq(&ctx->completion_lock);
- list_splice_init(&ctx->locked_free_list, &cs->free_list);
+ list_splice_init(&ctx->locked_free_list, &state->free_list);
ctx->locked_free_nr = 0;
spin_unlock_irq(&ctx->completion_lock);
}
@@ -1747,7 +1743,6 @@ static void io_flush_cached_locked_reqs(struct io_ring_ctx *ctx,
static bool io_flush_cached_reqs(struct io_ring_ctx *ctx)
{
struct io_submit_state *state = &ctx->submit_state;
- struct io_comp_state *cs = &state->comp;
int nr;
/*
@@ -1756,11 +1751,11 @@ static bool io_flush_cached_reqs(struct io_ring_ctx *ctx)
* side cache.
*/
if (READ_ONCE(ctx->locked_free_nr) > IO_COMPL_BATCH)
- io_flush_cached_locked_reqs(ctx, cs);
+ io_flush_cached_locked_reqs(ctx, state);
nr = state->free_reqs;
- while (!list_empty(&cs->free_list)) {
- struct io_kiocb *req = list_first_entry(&cs->free_list,
+ while (!list_empty(&state->free_list)) {
+ struct io_kiocb *req = list_first_entry(&state->free_list,
struct io_kiocb, inflight_entry);
list_del(&req->inflight_entry);
@@ -1947,7 +1942,7 @@ static void ctx_flush_and_put(struct io_ring_ctx *ctx)
{
if (!ctx)
return;
- if (ctx->submit_state.comp.nr) {
+ if (ctx->submit_state.compl_nr) {
mutex_lock(&ctx->uring_lock);
io_submit_flush_completions(ctx);
mutex_unlock(&ctx->uring_lock);
@@ -2144,19 +2139,19 @@ static void io_req_free_batch(struct req_batch *rb, struct io_kiocb *req,
if (state->free_reqs != ARRAY_SIZE(state->reqs))
state->reqs[state->free_reqs++] = req;
else
- list_add(&req->inflight_entry, &state->comp.free_list);
+ list_add(&req->inflight_entry, &state->free_list);
}
static void io_submit_flush_completions(struct io_ring_ctx *ctx)
__must_hold(&req->ctx->uring_lock)
{
- struct io_comp_state *cs = &ctx->submit_state.comp;
- int i, nr = cs->nr;
+ struct io_submit_state *state = &ctx->submit_state;
+ int i, nr = state->compl_nr;
struct req_batch rb;
spin_lock_irq(&ctx->completion_lock);
for (i = 0; i < nr; i++) {
- struct io_kiocb *req = cs->reqs[i];
+ struct io_kiocb *req = state->compl_reqs[i];
__io_cqring_fill_event(ctx, req->user_data, req->result,
req->compl.cflags);
@@ -2167,7 +2162,7 @@ static void io_submit_flush_completions(struct io_ring_ctx *ctx)
io_init_req_batch(&rb);
for (i = 0; i < nr; i++) {
- struct io_kiocb *req = cs->reqs[i];
+ struct io_kiocb *req = state->compl_reqs[i];
/* submission and completion refs */
if (req_ref_sub_and_test(req, 2))
@@ -2175,7 +2170,7 @@ static void io_submit_flush_completions(struct io_ring_ctx *ctx)
}
io_req_free_batch_finish(ctx, &rb);
- cs->nr = 0;
+ state->compl_nr = 0;
}
/*
@@ -6485,10 +6480,10 @@ issue_sqe:
/* drop submission reference */
if (req->flags & REQ_F_COMPLETE_INLINE) {
struct io_ring_ctx *ctx = req->ctx;
- struct io_comp_state *cs = &ctx->submit_state.comp;
+ struct io_submit_state *state = &ctx->submit_state;
- cs->reqs[cs->nr++] = req;
- if (cs->nr == ARRAY_SIZE(cs->reqs))
+ state->compl_reqs[state->compl_nr++] = req;
+ if (state->compl_nr == ARRAY_SIZE(state->compl_reqs))
io_submit_flush_completions(ctx);
} else {
io_put_req(req);
@@ -6691,7 +6686,7 @@ static void io_submit_state_end(struct io_submit_state *state,
{
if (state->link.head)
io_queue_sqe(state->link.head);
- if (state->comp.nr)
+ if (state->compl_nr)
io_submit_flush_completions(ctx);
if (state->plug_started)
blk_finish_plug(&state->plug);
@@ -8636,19 +8631,17 @@ static void io_req_cache_free(struct list_head *list)
static void io_req_caches_free(struct io_ring_ctx *ctx)
{
- struct io_submit_state *submit_state = &ctx->submit_state;
- struct io_comp_state *cs = &ctx->submit_state.comp;
+ struct io_submit_state *state = &ctx->submit_state;
mutex_lock(&ctx->uring_lock);
- if (submit_state->free_reqs) {
- kmem_cache_free_bulk(req_cachep, submit_state->free_reqs,
- submit_state->reqs);
- submit_state->free_reqs = 0;
+ if (state->free_reqs) {
+ kmem_cache_free_bulk(req_cachep, state->free_reqs, state->reqs);
+ state->free_reqs = 0;
}
- io_flush_cached_locked_reqs(ctx, cs);
- io_req_cache_free(&cs->free_list);
+ io_flush_cached_locked_reqs(ctx, state);
+ io_req_cache_free(&state->free_list);
mutex_unlock(&ctx->uring_lock);
}