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Re: [Qemu-block] [PATCH 1/2] iotests: 030 TestParallelOps non-shared bas

From: Alberto Garcia
Subject: Re: [Qemu-block] [PATCH 1/2] iotests: 030 TestParallelOps non-shared base node
Date: Thu, 21 Mar 2019 15:51:12 +0100
User-agent: Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu)

On Thu 21 Mar 2019 12:53:57 PM CET, Vladimir Sementsov-Ogievskiy wrote:
>>> Yes, we probably need to rethink this scenario a bit.
>> But yes, even with a counter, the other problem would still remain
>> (that the first job can't remove the filter on completion because the
>> second one has frozen its link to the filter).
>> I don't think that's a case we want to just forbid because nobody
>> needs this anyway. It's a sign of a more fundamental problem in our
>> design, and I'm sure it will bite us in other places, too.
> Does it mean that we now have problems with other jobs which already
> has filter if use them in parallel with stream?

I think if there's a job that can insert a filter above the 'base' node
then we have a problem.

I was checking the tests that run commit and stream in parallel in 030,
but they do commit on the upper images and stream on the lower ones, so
that's safe. I'll try to run them the other way around because we might
have a problem there.


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