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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 18 Mar 2019 12:57:28 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Thomas Müller <thomas@...htm.de>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: disabling secondary CPU hangs / system fails to suspend with
 kernel 4.19+

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 :/