From: luca abeni <luca.abeni@unitn.it>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, Juri Lelli <juri.lelli@arm.com>,
Daniel Bristot de Oliveira <bristot@redhat.com>
Subject: Re: Doubt about push_dl_task() / find_lock_later_rq()
Date: Thu, 5 Jan 2017 13:19:26 +0100 [thread overview]
Message-ID: <20170105131926.52b5fe37@sweethome> (raw)
In-Reply-To: <20170105114838.GJ3093@worktop>
On Thu, 5 Jan 2017 12:48:38 +0100
Peter Zijlstra <peterz@infradead.org> wrote:
> On Thu, Jan 05, 2017 at 08:29:23AM +0100, luca abeni wrote:
[...]
> > I was confused by the fact that in some cases I saw
> > rq->dl.earliest_dl.curr != rq->curr->dl.deadline
> >
> > I still do not understand how this can happen (I am not changing
> > tasks affinities), and I am investigating this.
>
>
> I'm having trouble spotting code that does that...
I think I might have found the issue (switched_to_dl() adjusting the
task's deadline without dequeueing/re-enqueueing it)... I am working on
a patch, and I'll send it this afternoon.
Thanks,
Luca
prev parent reply other threads:[~2017-01-05 12:20 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-04 14:49 Doubt about push_dl_task() / find_lock_later_rq() luca abeni
2017-01-05 7:29 ` luca abeni
2017-01-05 11:48 ` Peter Zijlstra
2017-01-05 12:19 ` luca abeni [this message]
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