From: Pavel Begunkov <[email protected]>
To: io-uring <[email protected]>, Jens Axboe <[email protected]>
Subject: [RFC] do_iopoll() and *grab_env()
Date: Thu, 11 Jun 2020 18:54:09 +0300 [thread overview]
Message-ID: <[email protected]> (raw)
io_do_iopoll() can async punt a request with io_queue_async_work(),
so doing io_req_work_grab_env(). The problem is that iopoll() can
be called from who knows what context, e.g. from a completely
different process with its own memory space, creds, etc.
io_do_iopoll() {
ret = req->poll();
if (ret == -EAGAIN)
io_queue_async_work()
...
}
I can't find it handled in io_uring. Can this even happen?
Wouldn't it be better to complete them with -EAGAIN?
--
Pavel Begunkov
next reply other threads:[~2020-06-11 15:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-11 15:54 Pavel Begunkov [this message]
2020-06-12 17:02 ` [RFC] do_iopoll() and *grab_env() Jens Axboe
2020-06-12 17:30 ` Pavel Begunkov
2020-06-12 17:55 ` Jens Axboe
2020-06-12 18:02 ` Jens Axboe
2020-06-12 18:33 ` Pavel Begunkov
2020-06-12 18:46 ` Pavel Begunkov
2020-06-12 19:42 ` Jens Axboe
2020-06-13 19:12 ` Pavel Begunkov
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