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io_uring: don't reinit submit state every time
As now submit_state is retained across syscalls, we can save ourself from initialising it from ground up for each io_submit_sqes(). Set some fields during ctx allocation, and just keep them always consistent. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> [axboe: remove unnecessary zeroing of ctx members] Signed-off-by: Jens Axboe <axboe@kernel.dk>
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1 changed files with 4 additions and 5 deletions
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@ -1345,6 +1345,7 @@ static struct io_ring_ctx *io_ring_ctx_alloc(struct io_uring_params *p)
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INIT_LIST_HEAD(&ctx->rsrc_ref_list);
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INIT_DELAYED_WORK(&ctx->rsrc_put_work, io_rsrc_put_work);
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init_llist_head(&ctx->rsrc_put_llist);
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INIT_LIST_HEAD(&submit_state->comp.list);
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return ctx;
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err:
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if (ctx->fallback_req)
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@ -6661,8 +6662,10 @@ static void io_submit_state_end(struct io_submit_state *state,
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if (state->plug_started)
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blk_finish_plug(&state->plug);
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io_state_file_put(state);
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if (state->free_reqs)
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if (state->free_reqs) {
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kmem_cache_free_bulk(req_cachep, state->free_reqs, state->reqs);
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state->free_reqs = 0;
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}
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}
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/*
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@ -6672,10 +6675,6 @@ static void io_submit_state_start(struct io_submit_state *state,
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unsigned int max_ios)
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{
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state->plug_started = false;
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state->comp.nr = 0;
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INIT_LIST_HEAD(&state->comp.list);
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state->free_reqs = 0;
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state->file_refs = 0;
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state->ios_left = max_ios;
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}
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