From: Jens Axboe <axboe@kernel.dk>
To: Stefano Garzarella <sgarzare@redhat.com>
Cc: io-uring@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH liburing 1/1] test: add epoll test case
Date: Mon, 27 Jan 2020 09:32:43 -0700 [thread overview]
Message-ID: <b1b26e79-507a-b339-2850-d2686661e669@kernel.dk> (raw)
In-Reply-To: <20200127161701.153625-2-sgarzare@redhat.com>
On 1/27/20 9:17 AM, Stefano Garzarella wrote:
> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
You're not reaping CQ events, and hence you overflow the ring. Once
overflown, an attempt to submit new IO will returns in a -16/-EBUSY
return value. This is io_uring telling you that it won't submit more
IO until you've emptied the completion ring so io_uring can flush
the overflown entries to the ring.
--
Jens Axboe
next prev parent reply other threads:[~2020-01-27 16:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-27 16:17 [PATCH liburing 0/1] test: add epoll test case Stefano Garzarella
2020-01-27 16:17 ` [PATCH liburing 1/1] " Stefano Garzarella
2020-01-27 16:32 ` Jens Axboe [this message]
2020-01-27 18:25 ` Stefano Garzarella
2020-01-27 18:46 ` Jens Axboe
2020-01-27 18:50 ` Stefano Garzarella
2020-01-28 13:06 ` Stefano Garzarella
2020-01-27 16:26 ` [PATCH liburing 0/1] " Jens Axboe
2020-01-27 18:00 ` Stefano Garzarella
2020-01-27 18:07 ` Jens Axboe
2020-01-27 18:28 ` Stefano Garzarella
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