linux-kernel - Re: blk_mq_sched_insert_request: inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage

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Message-ID: <c4fb0293-d0cb-ebff-cddf-a4e301826fbc@kernel.dk>
Date:   Tue, 1 Aug 2017 09:26:09 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Bart Van Assche <Bart.VanAssche@....com>,
        Brian J King <bjking1@...ibm.com>
Cc:     "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>
Subject: Re: blk_mq_sched_insert_request: inconsistent {SOFTIRQ-ON-W} ->
 {IN-SOFTIRQ-W} usage

On 08/01/2017 12:55 AM, Michael Ellerman wrote:
> Jens Axboe <axboe@...nel.dk> writes:
> ...
>>
>> Can you try the below fix? Should be more palatable than the previous
>> one. Brian, maybe you can take a look at the IRQ issue mentioned above?
> 
> Given the patch from Brian fixed the lockdep warning, do you still want
> me to try and test this one?

Nope, we don't have to do that. I'd much rather just add a WARN_ON()
or similar to make sure we catch buggy users earlier. scsi_run_queue()
needs a

WARN_ON(in_interrupt());

but it might be better to put that in __blk_mq_run_hw_queue().

-- 
Jens Axboe