[Bug 101838] [BAT][ELK] The machine fails to resume after 4.13-rc1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101838

--- Comment #9 from Martin Peres <martin.peres at free.fr> ---
(In reply to latalante from comment #8)
> (In reply to Martin Peres from comment #7)
> > Thanks, I communicated that to the developers. I hope it helps.
> 
> Sorry for the unnecessary misleading.
> In my case, hanging out after sleep is related to - mq-deadline/ext4 IO
> hangs.
> https://lkml.org/lkml/2017/6/25/248
> 
> I have no idea why he disappeared default CFQ scheduler, though in the
> configuration it is:
> CONFIG_IOSCHED_CFQ=y
> CONFIG_DEFAULT_CFQ=y
> CONFIG_DEFAULT_IOSCHED="cfq"
> 
> 4.12.3
> cat /sys/block/sda/queue/scheduler
> [cfq]
> 
> 4.13-rc2
> cat /sys/block/sda/queue/scheduler
> [mq-deadline] bfq none
> 
> After
> echo none > /sys/block/sda/queue/scheduler
> I did not noticed any hang on the kernel 4.13-rc2 (out after sleep).

Thanks for the info!

The following patch fixes the issue for us: https://lkml.org/lkml/2017/7/27/653

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