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io_uring: use correct "is IO worker" helper

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Since we switched to io-wq, the dependent link optimization for when to
pass back work inline has been broken. Fix this by providing a suitable
io-wq helper for io_uring to use to detect when to do this.

Fixes: 561fb04a6a ("io_uring: replace workqueue usage with io-wq")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2019-11-12 07:56:39 -07:00
parent 76a46e066e
commit 960e432dfa
2 changed files with 5 additions and 1 deletions
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4
fs/io-wq.h
View File

@ -62,4 +62,8 @@ static inline void io_wq_worker_running(struct task_struct *tsk)
}
#endif
static inline bool io_wq_current_is_worker(void)
{
return in_task() && (current->flags & PF_IO_WORKER);
}
#endif

2
fs/io_uring.c
View File

@ -872,7 +872,7 @@ static void io_req_link_next(struct io_kiocb *req, struct io_kiocb **nxtptr)
/* we dropped this link, get next */
nxt = list_first_entry_or_null(&req->link_list,
struct io_kiocb, list);
} else if (nxtptr && current_work()) {
} else if (nxtptr && io_wq_current_is_worker()) {
*nxtptr = nxt;
break;
} else {