From: Jens Axboe <[email protected]>
To: Glauber Costa <[email protected]>
Cc: [email protected], Avi Kivity <[email protected]>
Subject: Re: crash on connect
Date: Thu, 20 Feb 2020 08:38:59 -0800 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAD-J=zbRDiK2PfXW4B=gHjKtqX1SdXHHne9TsD-NVvp-uznkHg@mail.gmail.com>
On 2/20/20 9:34 AM, Glauber Costa wrote:
> On Thu, Feb 20, 2020 at 11:29 AM Jens Axboe <[email protected]> wrote:
>>
>> On 2/20/20 9:17 AM, Jens Axboe wrote:
>>> On 2/20/20 7:19 AM, Glauber Costa wrote:
>>>> Hi there, me again
>>>>
>>>> Kernel is at 043f0b67f2ab8d1af418056bc0cc6f0623d31347
>>>>
>>>> This test is easier to explain: it essentially issues a connect and a
>>>> shutdown right away.
>>>>
>>>> It currently fails due to no fault of io_uring. But every now and then
>>>> it crashes (you may have to run more than once to get it to crash)
>>>>
>>>> Instructions are similar to my last test.
>>>> Except the test to build is now "tests/unit/connect_test"
>>>> Code is at [email protected]:glommer/seastar.git branch io-uring-connect-crash
>>>>
>>>> Run it with ./build/release/tests/unit/connect_test -- -c1
>>>> --reactor-backend=uring
>>>>
>>>> Backtrace attached
>>>
>>> Perfect thanks, I'll take a look!
>>
>> Haven't managed to crash it yet, but every run complains:
>>
>> got to shutdown of 10 with refcnt: 2
>> Refs being all dropped, calling forget for 10
>> terminate called after throwing an instance of 'fmt::v6::format_error'
>> what(): argument index out of range
>> unknown location(0): fatal error: in "unixdomain_server": signal: SIGABRT (application abort requested)
>>
>> Not sure if that's causing it not to fail here.
>
> Ok, that means it "passed". (I was in the process of figuring out
> where I got this wrong when I started seeing the crashes)
Can you do, in your kernel dir:
$ gdb vmlinux
[...]
(gdb) l *__io_queue_sqe+0x4a
and see what it says?
--
Jens Axboe
next prev parent reply other threads:[~2020-02-20 16:39 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-20 14:19 crash on connect Glauber Costa
2020-02-20 16:17 ` Jens Axboe
2020-02-20 16:29 ` Jens Axboe
2020-02-20 16:34 ` Glauber Costa
2020-02-20 16:38 ` Jens Axboe [this message]
2020-02-20 16:52 ` Glauber Costa
2020-02-20 17:28 ` Jens Axboe
2020-02-20 17:33 ` Glauber Costa
[not found] ` <CAD-J=zbdrZJ2nKgH3Ob=QAAM9Ci439T9DduNxvetK9B_52LDOQ@mail.gmail.com>
2020-02-20 19:12 ` Jens Axboe
2020-02-20 19:19 ` Glauber Costa
2020-02-20 19:36 ` Glauber Costa
2020-02-20 20:08 ` Jens Axboe
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