linux-kernel - Re: 2.6.27-rc2: unable to suspend

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Date:	Sat, 9 Aug 2008 23:53:55 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Andrey Borzenkov <arvidjaar@...l.ru>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-usb@...r.kernel.org, Alan Stern <stern@...land.harvard.edu>
Subject: Re: 2.6.27-rc2: unable to suspend - one task not freezed

On Saturday, 9 of August 2008, Andrey Borzenkov wrote:
> 2.6.27-rc2 + unrevert of e872154921a6b5256a3c412dd69158ac0b135176
> (USB: don't explicitly reenable root-hub status interrupts) + fix
> of above from Alan Stern (OHCI: fix system hang caused by earlier patch).

Why do you have to unrevert commit e872154921a6b5256a3c412dd69158ac0b135176
exactly?

> System cannot be suspended - some task cannot be freezed. I think it is
> khubd ...

Yes, it is.

It looks like khubd is running in a loop without checking TIF_FREEZE.

> dmesg and config attached.

Hm.  Is this 100% reproducible?

Rafael
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