From: "Carter Li 李通洲" <carter.li@eoitek.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: io-uring <io-uring@vger.kernel.org>
Subject: Re: Questions about IORING_OP_ASYNC_CANCEL usage
Date: Fri, 21 Aug 2020 05:20:53 +0000 [thread overview]
Message-ID: <C78150AD-A5CB-4876-B5AA-BA737325F519@eoitek.com> (raw)
In-Reply-To: <1B338A13-1D60-4E7A-94C4-BDF06F20975B@eoitek.com>
Sorry, please ignore this mail, I’ll send a new one
> 2020年8月21日 下午1:17，Carter Li 李通洲 <carter.li@eoitek.com> 写道：
>
> Hi Jens,
>
> I have some ( maybe stupid ) questions about IORING_OP_ASYNC_CANCEL:
>
> 1. Does IORING_OP_ASYNC_CANCEL always complete inline ( i.e. finishes before the io_uring_enter syscall returns )?
>
> 2. Does recent changes of async buffered reads have any impact with cancelation? Can we cancel a buffered IORING_OP_READV operation after it’s started? Although the disk->kernel DMA operation is not cancelable, can we cancel the kernel->userland data copy?
>
> 3. I heard that all buffered writes are serialized on the inode mutex. If a buffered IORING_OP_WRITEV is blocked on the node mutex, can we cancel it?
>
> Thanks in advance,
> Carter
next prev parent reply other threads:[~2020-08-21 5:21 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-25 0:39 [RFC] single cqe per link Pavel Begunkov
2020-02-25 2:14 ` Carter Li 李通洲
2020-02-25 2:36 ` Jens Axboe
2020-02-25 3:13 ` Jens Axboe
2020-02-25 10:12 ` Pavel Begunkov
2020-02-25 20:20 ` Jens Axboe
2020-02-25 21:13 ` Pavel Begunkov
2020-08-21 5:17 ` Questions about IORING_OP_ASYNC_CANCEL usage Carter Li 李通洲
2020-08-21 5:20 ` Carter Li 李通洲 [this message]
2020-02-25 2:24 ` [RFC] single cqe per link Jens Axboe
2020-08-21 5:22 Questions about IORING_OP_ASYNC_CANCEL usage Carter Li 李通洲
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