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Date:   Wed, 15 Jan 2020 12:26:53 -0400
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Christoph Hellwig <hch@....de>
Cc:     linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Waiman Long <longman@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-ext4@...r.kernel.org, cluster-devel@...hat.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: RFC: hold i_rwsem until aio completes

On Wed, Jan 15, 2020 at 04:36:14PM +0100, Christoph Hellwig wrote:

> synchronous and currently hack that up, so a version of the percpu_ref
> that actually waits for the other references to away like we hacked
> up various places seems to exactly suit your requirements.

Ah, yes, sounds like a similar goal, many cases I'm thinking about
also hack up a kref to trigger a completion to make it
synchronous.

Jason

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