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io_uring: rename 'in_idle' to 'in_cancel' 

This better describes what it does - it's incremented when the task is
currently undergoing a cancelation operation, due to exiting or exec'ing.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2023-02-17 08:27:23 -07:00
parent ce8e04f6e5
commit 8d664282a0
3 changed files with 11 additions and 11 deletions
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2
include/linux/io_uring_types.h
View File

@ -58,7 +58,7 @@ struct io_uring_task {
struct xarray xa;
struct wait_queue_head wait;
atomic_t in_idle;
atomic_t in_cancel;
atomic_t inflight_tracked;
struct percpu_counter inflight;

18
io_uring/io_uring.c
View File

@ -719,7 +719,7 @@ static void io_put_task_remote(struct task_struct *task, int nr)
struct io_uring_task *tctx = task->io_uring;
percpu_counter_sub(&tctx->inflight, nr);
if (unlikely(atomic_read(&tctx->in_idle)))
if (unlikely(atomic_read(&tctx->in_cancel)))
wake_up(&tctx->wait);
put_task_struct_many(task, nr);
}
@ -1258,8 +1258,8 @@ void tctx_task_work(struct callback_head *cb)
ctx_flush_and_put(ctx, &uring_locked);
/* relaxed read is enough as only the task itself sets ->in_idle */
if (unlikely(atomic_read(&tctx->in_idle)))
/* relaxed read is enough as only the task itself sets ->in_cancel */
if (unlikely(atomic_read(&tctx->in_cancel)))
io_uring_drop_tctx_refs(current);
trace_io_uring_task_work_run(tctx, count, loops);
@ -1291,7 +1291,7 @@ static void io_req_local_work_add(struct io_kiocb *req)
/* needed for the following wake up */
smp_mb__after_atomic();
if (unlikely(atomic_read(&req->task->io_uring->in_idle))) {
if (unlikely(atomic_read(&req->task->io_uring->in_cancel))) {
io_move_task_work_from_local(ctx);
goto put_ref;
}
@ -2937,12 +2937,12 @@ static __cold void io_tctx_exit_cb(struct callback_head *cb)
work = container_of(cb, struct io_tctx_exit, task_work);
/*
* When @in_idle, we're in cancellation and it's racy to remove the
* When @in_cancel, we're in cancellation and it's racy to remove the
* node. It'll be removed by the end of cancellation, just ignore it.
* tctx can be NULL if the queueing of this task_work raced with
* work cancelation off the exec path.
*/
if (tctx && !atomic_read(&tctx->in_idle))
if (tctx && !atomic_read(&tctx->in_cancel))
io_uring_del_tctx_node((unsigned long)work->ctx);
complete(&work->completion);
}
@ -3210,7 +3210,7 @@ __cold void io_uring_cancel_generic(bool cancel_all, struct io_sq_data *sqd)
if (tctx->io_wq)
io_wq_exit_start(tctx->io_wq);
atomic_inc(&tctx->in_idle);
atomic_inc(&tctx->in_cancel);
do {
bool loop = false;
@ -3261,9 +3261,9 @@ __cold void io_uring_cancel_generic(bool cancel_all, struct io_sq_data *sqd)
if (cancel_all) {
/*
* We shouldn't run task_works after cancel, so just leave
* ->in_idle set for normal exit.
* ->in_cancel set for normal exit.
*/
atomic_dec(&tctx->in_idle);
atomic_dec(&tctx->in_cancel);
/* for exec all current's requests should be gone, kill tctx */
__io_uring_free(current);
}

2
io_uring/tctx.c
View File

@ -83,7 +83,7 @@ __cold int io_uring_alloc_task_context(struct task_struct *task,
xa_init(&tctx->xa);
init_waitqueue_head(&tctx->wait);
atomic_set(&tctx->in_idle, 0);
atomic_set(&tctx->in_cancel, 0);
atomic_set(&tctx->inflight_tracked, 0);
task->io_uring = tctx;
init_llist_head(&tctx->task_list);