linux-kernel - Re: 2.6.23 regression: do

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]

Message-Id: <200710081701.34368.bs@q-leap.de>
Date:	Mon, 8 Oct 2007 17:01:34 +0200
From:	Bernd Schubert <bs@...eap.de>
To:	Rik van Riel <riel@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.23 regression: do_nanosleep will not return

On Monday 08 October 2007 16:32:52 Rik van Riel wrote:
> On Mon, 08 Oct 2007 15:20:26 +0200
>
> Bernd Schubert <bs@...eap.de> wrote:
> > Bernd Schubert wrote:
> > > we have a system here were e.g. "sleep 1" will never finish. This
> > > is an issue of 2.6.23, on all older kernel versions it did work
> > > fine.
> > >
> > > Seems to hang in do_nanosleep()
> >
> > Update: Enabling hpet in the bios and setting clocksource=hpet as
> > command line parameter will fix it, but still its not nice that
> > something that worked without a problem in 2.6.22 and below suddenly
> > doesn't work in 2.6.23.
>
> Which timer source is in use when the system hangs?

Well, not the systems hangs, only processes running nanosleep. Well, since the 
system is booted diskless, one of the very first commands is to 
run "/etc/init.d/portmap start", which has a sleep call in its script and so 
it will halt the boot process.

The problematic timer source is acpi_pm. Its also interesting that setting the 
timer source 
via /sys/devices/system/clocksource/clocksource0/current_clocksource won't 
fix that problem. Only the boot option clocksource={other than acpi_pm} does 
help.

Thanks,
Bernd

-- 
Bernd Schubert
Q-Leap Networks GmbH
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/