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Re: [Qemu-block] [PATCH v2] nbd/server: attach client channel to the exp
From: |
Eric Blake |
Subject: |
Re: [Qemu-block] [PATCH v2] nbd/server: attach client channel to the export's AioContext |
Date: |
Fri, 20 Sep 2019 17:03:31 -0500 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 |
On 9/20/19 2:11 PM, Eric Blake wrote:
> On 9/20/19 1:49 PM, John Snow wrote:
>>
>
>>>> To fix this, as soon we have the export corresponding to the client,
>>>> we call qio_channel_attach_aio_context() to attach the QIOChannel
>>>> context to the export's AioContext. This matches with the logic at
>>>> blk_aio_attached().
>>>>
>
>>>
>>> I assume this patch has been superseded by Eric's later patches?
>>
>> Nevermind -- my filtering got messed up slightly and I missed the
>> followup. I see that Eric staged this.
>
> I actually think both patches are needed: this one covers transactions,
> while my later patch was on top of this to protect shutdown. But now
> you've made me curious; I'll see if my patch hoisted in front still
> solves everything, or if we really do need both.
>
Nope, both patches are still needed. Sergio's fixes the assertion:
(qemu) qemu-kvm: io/channel.c:411: qio_channel_restart_read:
Assertion `qemu_get_current_aio_context() ==
qemu_coroutine_get_aio_context(co)' failed.
while mine fixes:
+qemu: qemu_mutex_unlock_impl: Operation not permitted
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
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