linux-kernel - Re: disabling secondary CPU hangs / system fails to suspend with kernel 4.19+

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Message-ID: <9a345d3c-c17c-95b2-dcbe-af72dee42a1a@mathtm.de>
Date:   Fri, 12 Apr 2019 07:30:15 +0200
From:   Thomas Müller <thomas@...htm.de>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: disabling secondary CPU hangs / system fails to suspend with
 kernel 4.19+

Hi,

good news: starting with 5.0.6 suspend is working again.

Best regards
Thomas

Am 29.03.19 um 10:22 schrieb Thomas Müller:
> Hi,
> 
> Am 18.03.19 um 12:57 schrieb Peter Zijlstra:
>> On Fri, Mar 15, 2019 at 09:21:02PM +0100, Thomas Müller wrote:
>>> I've just re-tested with runlevel 3.
>>> Not a real VGA console, but at least no Wayland or Gnome to interfere...
>>>
>>> `echo 0 > /sys/...` just blocks and no message whatsoever is visible in dmesg.
>>>
>>> I've executed `echo 0 > ...` in the background to keep my console functional and I can e.g. echo
>>> something to /dev/kmsg and it shows up, so reading/updating the log buffer appears to be working
>>> just fine.
>>
>> Damn.. Thanks for trying. I'll see if I can come up with something, but
>> I'm out of idea for now :/
>>
> Any new ideas so far?
> 
> For reference:
> I've just tested a vanilla 5.0.5 with localmodconfig (attached)... same behavior :(
> 
> 
> Best regards
> Thomas
>