On Wed, 23 May 2007, Rafael J. Wysocki wrote:
> On Wednesday, 23 May 2007 09:48, Andrew Morton wrote:
> > On Wed, 23 May 2007 00:42:33 -0700 Andrew Morton <[email protected]> wrote:
> >
> > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.22-rc2/2.6.22-rc2-mm1/
> >
> > This is intermittently getting resume-from-RAM failures. It is not
> > sufficiently repeatable to be able to bisect.
> >
> > [ 1381.119362] PM: Preparing system for mem sleep
> > [ 2331.798452] Stopping tasks ...
> > [ 2351.760431] Stopping kernel threads timed out after 20 seconds (2 tasks refusing to freeze):
> > [ 2351.762385] ksuspend_usbd
> > [ 2351.764374] khubd
> > [ 2351.766338] Restarting tasks ... done.
>
> Hmm, that seems to be related to usb-fix-suspend-to-ram.patch (probably one of
> the threads is waiting for a completion by some other thread that has been
> frozen already).
Is it possible to get an Alt-SysRq-T stack trace during those 20
seconds? Knowing what those threads are waiting for would be a big
help.
Alan Stern
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