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io_uring: add helper for task work execution code

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Add a helper for task work execution code. We will use it later.

Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Hao Xu <haoxu@linux.alibaba.com>
Link: https://lore.kernel.org/r/20211207093951.247840-4-haoxu@linux.alibaba.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Hao Xu 2021-12-07 17:39:49 +08:00 committed by Jens Axboe
parent 4813c37792
commit 9f8d032a36
1 changed files with 20 additions and 16 deletions
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36
fs/io_uring.c
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@ -2217,6 +2217,25 @@ static void ctx_flush_and_put(struct io_ring_ctx *ctx, bool *locked)
percpu_ref_put(&ctx->refs);
}
static void handle_tw_list(struct io_wq_work_node *node, struct io_ring_ctx **ctx, bool *locked)
{
do {
struct io_wq_work_node *next = node->next;
struct io_kiocb *req = container_of(node, struct io_kiocb,
io_task_work.node);
if (req->ctx != *ctx) {
ctx_flush_and_put(*ctx, locked);
*ctx = req->ctx;
/* if not contended, grab and improve batching */
*locked = mutex_trylock(&(*ctx)->uring_lock);
percpu_ref_get(&(*ctx)->refs);
}
req->io_task_work.func(req, locked);
node = next;
} while (node);
}
static void tctx_task_work(struct callback_head *cb)
{
bool locked = false;
@ -2239,22 +2258,7 @@ static void tctx_task_work(struct callback_head *cb)
if (!node)
break;
do {
struct io_wq_work_node *next = node->next;
struct io_kiocb *req = container_of(node, struct io_kiocb,
io_task_work.node);
if (req->ctx != ctx) {
ctx_flush_and_put(ctx, &locked);
ctx = req->ctx;
/* if not contended, grab and improve batching */
locked = mutex_trylock(&ctx->uring_lock);
percpu_ref_get(&ctx->refs);
}
req->io_task_work.func(req, &locked);
node = next;
} while (node);
handle_tw_list(node, &ctx, &locked);
cond_resched();
}