From: Jens Axboe <[email protected]>
To: Jeff Moyer <[email protected]>
Cc: [email protected], [email protected]
Subject: Re: [PATCHSET 0/2] io_uring: handle short reads internally
Date: Thu, 13 Aug 2020 14:41:36 -0600 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On 8/13/20 2:37 PM, Jens Axboe wrote:
> On 8/13/20 2:33 PM, Jens Axboe wrote:
>> On 8/13/20 2:25 PM, Jeff Moyer wrote:
>>> Jens Axboe <[email protected]> writes:
>>>
>>>> Since we've had a few cases of applications not dealing with this
>>>> appopriately, I believe the safest course of action is to ensure that
>>>> we don't return short reads when we really don't have to.
>>>>
>>>> The first patch is just a prep patch that retains iov_iter state over
>>>> retries, while the second one actually enables just doing retries if
>>>> we get a short read back.
>>>
>>> Have you run this through the liburing regression tests?
>>>
>>> Tests <eeed8b54e0df-test> <timeout-overflow> <read-write> failed
>>>
>>> I'll take a look at the failures, but wanted to bring it to your
>>> attention sooner rather than later. I was using your io_uring-5.9
>>> branch.
>>
>> The eed8b54e0df-test failure is known with this one, pretty sure it
>> was always racy, but I'm looking into it.
>>
>> The timeout-overflow test needs fixing, it's just an ordering thing
>> with the batched completions done through submit. Not new with these
>> patches.
>>
>> The read-write one I'm interested in, what did you run it on? And
>> what was the failure?
>
> BTW, what git sha did you run?
I do see a failure with dm on that, I'll take a look.
--
Jens Axboe
next prev parent reply other threads:[~2020-08-13 20:41 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-13 17:56 [PATCHSET 0/2] io_uring: handle short reads internally Jens Axboe
2020-08-13 17:56 ` [PATCH 1/2] io_uring: retain iov_iter state over io_read/io_write calls Jens Axboe
2020-08-13 17:56 ` [PATCH 2/2] io_uring: internally retry short reads Jens Axboe
2020-08-13 20:25 ` [PATCHSET 0/2] io_uring: handle short reads internally Jeff Moyer
2020-08-13 20:33 ` Jens Axboe
2020-08-13 20:37 ` Jens Axboe
2020-08-13 20:41 ` Jens Axboe [this message]
2020-08-13 20:49 ` Jeff Moyer
2020-08-13 22:08 ` Jens Axboe
2020-08-13 22:21 ` Jeff Moyer
2020-08-13 22:31 ` Jens Axboe
2020-08-17 20:55 ` Jeff Moyer
2020-08-17 20:57 ` Jens Axboe
2020-08-18 17:55 ` Jeff Moyer
2020-08-18 18:00 ` Jens Axboe
2020-08-18 18:07 ` Jeff Moyer
2020-08-18 18:10 ` Jens Axboe
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