linux-kernel - Re: waitqueue lockdep annotation V3

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Message-ID: <20180717142437.GA20286@lst.de>
Date:   Tue, 17 Jul 2018 16:24:37 +0200
From:   Christoph Hellwig <hch@....de>
To:     Davidlohr Bueso <dave@...olabs.net>
Cc:     Christoph Hellwig <hch@....de>, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Jason Baron <jbaron@...mai.com>, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: waitqueue lockdep annotation V3

On Thu, Jul 12, 2018 at 12:17:53PM -0700, Davidlohr Bueso wrote:
> On Thu, 14 Dec 2017, Christoph Hellwig wrote:
>
>> Hi all,
>>
>> this series adds a strategic lockdep_assert_held to __wake_up_common
>> to ensure callers really do hold the wait_queue_head lock when calling
>> the unlocked wake_up variants.  It turns out epoll did not do this
>> for a fairly common path (hit all the time by systemd during bootup),
>> so the second patch fixed this instance as well.
>
> I ran into these changes because of patch 1 getting rid of ep->lock. Is
> there any reason why this series was never picked up?

I'd love to see this merged, but I never heard back about it.