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From: Kevin Wolf <kwolf@redhat.com>
To: "Denis V. Lunev" <den@openvz.org>
Cc: qemu-devel@nongnu.org,
	Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>,
	Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 1/1] hmp: acquire aio_context in hmp_qemu_io
Date: Tue, 14 Jun 2016 10:44:58 +0200	[thread overview]
Message-ID: <20160614084458.GD4916@noname.str.redhat.com> (raw)
In-Reply-To: <575FC184.4090903@openvz.org>

Am 14.06.2016 um 10:34 hat Denis V. Lunev geschrieben:
> On 06/08/2016 02:23 PM, Kevin Wolf wrote:
> >Am 08.06.2016 um 11:39 hat Denis V. Lunev geschrieben:
> >>From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> >>
> >>Acquire aio context before run command, this is mandatory for unit tests.
> >>
> >>Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> >>Signed-off-by: Denis V. Lunev <den@openvz.org>
> >>CC: Kevin Wolf <kwolf@redhat.com>
> >>CC: Paolo Bonzini <pbonzini@redhat.com>
> >Looks right to me, but why "mandatory for unit tests"? Does this fix an
> >observable bug in unit tests? If so, we should be more specific in the
> >commit message.
> >
> >But in fact, I would only expect it to make a difference for dataplane
> >and I don't think we have test cases that use both the 'qemu-io' HMP
> >command and dataplane.
> >
> >Kevin
> the problem is that it is usually difficult to understand that
> the problem is in locking and find where the locking is missed.
> Here we do have a place, which is used by unit testing, with
> a locking missed.
> 
> May be now tests are not failing, but IMHO these tests MUST
> be fixed to accommodate future changes and thus this patch
> is mandatory for them.

I was never objecting to the patch, but just curious about the details
of a possible failure you were seeing because I didn't see how to hit
it in practice without dataplane.

Sorry for forgetting about the patch, I've applied it now.

Kevin

  reply	other threads:[~2016-06-14  8:45 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-08  9:39 [Qemu-devel] [PATCH 1/1] hmp: acquire aio_context in hmp_qemu_io Denis V. Lunev
2016-06-08 11:23 ` Kevin Wolf
2016-06-08 11:31   ` Denis V. Lunev
2016-06-14  8:34   ` Denis V. Lunev
2016-06-14  8:44     ` Kevin Wolf [this message]
2016-06-14  9:00       ` Denis V. Lunev
2016-06-15 20:31       ` Denis V. Lunev

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