Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: 2.6.23 regression: do_nanosleep will not return | Date | Mon, 8 Oct 2007 21:23:06 +0200 |
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On Monday, 8 October 2007 17:01, Bernd Schubert wrote: > On Monday 08 October 2007 16:32:52 Rik van Riel wrote: > > On Mon, 08 Oct 2007 15:20:26 +0200 > > > > Bernd Schubert <bs@q-leap.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.
I've created a bugzilla entry for this regression at
http://bugzilla.kernel.org/show_bug.cgi?id=9134
Please add a summary of your observations to it.
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