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Subject: Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
From: Mike Galbraith <efault@gmx.de>
To: Paolo Valente <paolo.valente@linaro.org>
Cc: Jens Axboe <axboe@kernel.dk>,
        Oleksandr Natalenko <oleksandr@natalenko.name>,
        stable <stable@vger.kernel.org>
Date: Mon, 19 Feb 2018 14:18:18 +0100
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On Mon, 2018-02-19 at 10:37 +0100, Paolo Valente wrote:
> 
> > Il giorno 19 feb 2018, alle ore 06:34, Mike Galbraith <efault@gmx.de> ha scritto:
> > 
> > FWIW, my box spent the weekend running a kbuild marathon with a52a69ea
> > reverted, has convinced me that it _is_ the source of the hang woes
> > (directly or indirectly).  No outright stalls, no stall for way too
> > long but then recover, nada, not the slightest hint of trouble.
> > 
> 
> ok, after this piece of evidence, and while waiting for more
> authoritative suggestions, I have investigated a little bit how to
> reduce the number of your angry tags available, to hopefully push your
> system so close to failure to have your problem reproduced reliably
> and quickly.

Neither wish came true.

	-Mike