| Message ID | 20230609122031.183730-7-hao.xu@linux.dev (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | fixed worker | expand |
On 6/9/23 13:20, Hao Xu wrote: > From: Hao Xu <howeyxu@tencent.com> > > After creating a io worker inline successfully, return the io_worker > structure. This is used by fixed worker. > > Signed-off-by: Hao Xu <howeyxu@tencent.com> > --- > io_uring/io-wq.c | 20 ++++++++++---------- > 1 file changed, 10 insertions(+), 10 deletions(-) > > diff --git a/io_uring/io-wq.c b/io_uring/io-wq.c > index 048856eef4d4..4338e5b23b07 100644 > --- a/io_uring/io-wq.c > +++ b/io_uring/io-wq.c > @@ -137,7 +137,7 @@ struct io_cb_cancel_data { > bool cancel_all; > }; > > -static bool create_io_worker(struct io_wq *wq, int index, bool fixed); > +static struct io_worker *create_io_worker(struct io_wq *wq, int index, bool fixed); > static void io_wq_dec_running(struct io_worker *worker); > static bool io_acct_cancel_pending_work(struct io_wq *wq, > struct io_wq_acct *acct, > @@ -284,8 +284,8 @@ static bool io_wq_activate_free_worker(struct io_wq *wq, > * We need a worker. If we find a free one, we're good. If not, and we're > * below the max number of workers, create one. > */ > -static bool io_wq_create_worker(struct io_wq *wq, struct io_wq_acct *acct, > - bool fixed) > +static struct io_worker *io_wq_create_worker(struct io_wq *wq, > + struct io_wq_acct *acct, bool fixed) > { > /* > * Most likely an attempt to queue unbounded work on an io_wq that > @@ -297,7 +297,7 @@ static bool io_wq_create_worker(struct io_wq *wq, struct io_wq_acct *acct, > raw_spin_lock(&wq->lock); > if (acct->nr_workers >= acct->max_workers) { > raw_spin_unlock(&wq->lock); > - return true; > + return NULL; Something is not right here. The function could succeed even if it didn't create a new worker. Now it's a failure. > } > acct->nr_workers++; > raw_spin_unlock(&wq->lock); > @@ -809,11 +809,11 @@ static void io_workqueue_create(struct work_struct *work) > kfree(worker); > } > > -static bool create_io_worker(struct io_wq *wq, int index, bool fixed) > +static struct io_worker *create_io_worker(struct io_wq *wq, int index, bool fixed) > { > struct io_wq_acct *acct = &wq->acct[index]; > struct io_worker *worker; > - struct task_struct *tsk; > + struct task_struct *tsk = NULL; > > __set_current_state(TASK_RUNNING); > > @@ -825,7 +825,7 @@ static bool create_io_worker(struct io_wq *wq, int index, bool fixed) > acct->nr_workers--; > raw_spin_unlock(&wq->lock); > io_worker_ref_put(wq); > - return false; > + return tsk ? (struct io_worker *)tsk : ERR_PTR(-ENOMEM); How it this conversion valid? I don't remember us overlaying struct io_worker onto task_struct > } > > refcount_set(&worker->ref, 1); > @@ -841,8 +841,8 @@ static bool create_io_worker(struct io_wq *wq, int index, bool fixed) > > tsk = create_io_thread(io_wq_worker, worker, NUMA_NO_NODE); > if (!IS_ERR(tsk)) { > - if (!fixed) > - io_init_new_worker(wq, worker, tsk); > + io_init_new_worker(wq, worker, tsk); > + return worker; > } else if (fixed || !io_should_retry_thread(PTR_ERR(tsk))) { > kfree(worker); > goto fail; > @@ -851,7 +851,7 @@ static bool create_io_worker(struct io_wq *wq, int index, bool fixed) > schedule_work(&worker->work); > } > > - return true; > + return (struct io_worker *)tsk; > } > > /*
diff --git a/io_uring/io-wq.c b/io_uring/io-wq.c index 048856eef4d4..4338e5b23b07 100644 --- a/io_uring/io-wq.c +++ b/io_uring/io-wq.c @@ -137,7 +137,7 @@ struct io_cb_cancel_data { bool cancel_all; }; -static bool create_io_worker(struct io_wq *wq, int index, bool fixed); +static struct io_worker *create_io_worker(struct io_wq *wq, int index, bool fixed); static void io_wq_dec_running(struct io_worker *worker); static bool io_acct_cancel_pending_work(struct io_wq *wq, struct io_wq_acct *acct, @@ -284,8 +284,8 @@ static bool io_wq_activate_free_worker(struct io_wq *wq, * We need a worker. If we find a free one, we're good. If not, and we're * below the max number of workers, create one. */ -static bool io_wq_create_worker(struct io_wq *wq, struct io_wq_acct *acct, - bool fixed) +static struct io_worker *io_wq_create_worker(struct io_wq *wq, + struct io_wq_acct *acct, bool fixed) { /* * Most likely an attempt to queue unbounded work on an io_wq that @@ -297,7 +297,7 @@ static bool io_wq_create_worker(struct io_wq *wq, struct io_wq_acct *acct, raw_spin_lock(&wq->lock); if (acct->nr_workers >= acct->max_workers) { raw_spin_unlock(&wq->lock); - return true; + return NULL; } acct->nr_workers++; raw_spin_unlock(&wq->lock); @@ -809,11 +809,11 @@ static void io_workqueue_create(struct work_struct *work) kfree(worker); } -static bool create_io_worker(struct io_wq *wq, int index, bool fixed) +static struct io_worker *create_io_worker(struct io_wq *wq, int index, bool fixed) { struct io_wq_acct *acct = &wq->acct[index]; struct io_worker *worker; - struct task_struct *tsk; + struct task_struct *tsk = NULL; __set_current_state(TASK_RUNNING); @@ -825,7 +825,7 @@ static bool create_io_worker(struct io_wq *wq, int index, bool fixed) acct->nr_workers--; raw_spin_unlock(&wq->lock); io_worker_ref_put(wq); - return false; + return tsk ? (struct io_worker *)tsk : ERR_PTR(-ENOMEM); } refcount_set(&worker->ref, 1); @@ -841,8 +841,8 @@ static bool create_io_worker(struct io_wq *wq, int index, bool fixed) tsk = create_io_thread(io_wq_worker, worker, NUMA_NO_NODE); if (!IS_ERR(tsk)) { - if (!fixed) - io_init_new_worker(wq, worker, tsk); + io_init_new_worker(wq, worker, tsk); + return worker; } else if (fixed || !io_should_retry_thread(PTR_ERR(tsk))) { kfree(worker); goto fail; @@ -851,7 +851,7 @@ static bool create_io_worker(struct io_wq *wq, int index, bool fixed) schedule_work(&worker->work); } - return true; + return (struct io_worker *)tsk; } /*