> Il giorno 13 feb 2017, alle ore 23:38, Bart Van Assche 
> <[email protected]> ha scritto:
> 
> On Mon, 2017-02-13 at 22:07 +0000, Bart Van Assche wrote:
>> On Mon, 2017-02-13 at 22:07 +0100, Paolo Valente wrote:
>>> but what do you think about trying this fix?
>> 
>> Sorry but with ... the same server I used for the previous test still
>> didn't boot up properly. A screenshot is available at
>> https://goo.gl/photos/Za9QVGCNe2BJBwxVA.
>> 
>>> Otherwise, if you have no news or suggestions, would you be willing to
>>> try my micro-logging proposal https://github.com/Algodev-github/bfq-mq?
>> 
>> Sorry but it's not clear to me what logging mechanism you are referring
>> to and how to enable it? Are you perhaps referring to
>> CONFIG_BFQ_REDIRECT_TO_CONSOLE?
> 
> Anyway, a second screenshot has been added to the same album after I had
> applied the following patch:
> 

Hi Bart,
thanks for this second attempt of yours.  Although, unfortunately, not
providing some clear indication of the exact cause of your hang (apart
from a possible deadlock), your log helped me notice another bug.

At any rate, as I have just written to Jens, I have pushed a new
version of the branch [1] (not just added new commits, but also
integrated some old commit with new changes, to make it more quickly).
The branch now contains both a fix for the above bug, and, more
importantly, a fix for the circular dependencies that were still
lurking around.  Could you please test it?

Crossing my fingers,
Paolo

[1] https://github.com/Algodev-github/bfq-mq

> diff --git a/block/Makefile b/block/Makefile
> index 1c04fe19e825..bf472ac82c08 100644
> --- a/block/Makefile
> +++ b/block/Makefile
> @@ -2,6 +2,8 @@
> # Makefile for the kernel block layer
> #
>  
> +KBUILD_CFLAGS += -DCONFIG_BFQ_REDIRECT_TO_CONSOLE
> +
> 
> obj-$(CONFIG_BLOCK) := bio.o elevator.o blk-core.o blk-tag.o blk-sysfs.o \
>                        blk-flush.o blk-settings.o blk-ioc.o blk-map.o \
>                        blk-exec.o blk-merge.o blk-softirq.o blk-timeout.o \
> 
> Bart.
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