linux-kernel - Re: [IB/srpt] c804af2c1d: last_state.test.blktests.exit

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Message-ID: <20200824133019.GH1152540@nvidia.com>
Date:   Mon, 24 Aug 2020 10:30:19 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Bart Van Assche <bvanassche@....org>
CC:     Sagi Grimberg <sagi@...mberg.me>,
        Yamin Friedman <yaminf@...lanox.com>,
        kernel test robot <rong.a.chen@...el.com>,
        Max Gurtovoy <maxg@...lanox.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg+lists@...pe.ca>,
        <linux-rdma@...r.kernel.org>, <lkp@...ts.01.org>
Subject: Re: [IB/srpt] c804af2c1d: last_state.test.blktests.exit_code.143

On Sun, Aug 23, 2020 at 02:18:41PM -0700, Bart Van Assche wrote:
 
> The patch below is sufficient to unbreak blktests. I think that the
> deadlock while unloading rdma_rxe happens because the RDMA core waits for
> all ib_dev references to be dropped before dealloc_driver is called.

Which is required, yes

> The rdma_rxe dealloc_driver implementation drops an ib_dev
> reference. 

Where does it do that? I didn't notice it?

Jason