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From: Andrey Borzenkov <arvidjaar@mail.ru>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Subject: Re: 2.6.27-rc2: unable to suspend - one task not freezed
Date: Sun, 10 Aug 2008 10:40:54 +0400
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Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       linux-usb@vger.kernel.org, Alan Stern <stern@rowland.harvard.edu>
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On Sunday 10 August 2008, Rafael J. Wysocki wrote:
> 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=
).
>=20
> Why do you have to unrevert commit e872154921a6b5256a3c412dd69158ac0b1351=
76
> exactly?
>=20

This commit caused my system to hang after ohci_usb was loaded. It was
reverted in 2.6.26 after my report. Later Alan sent the fix for it which I
have been testing. This commit (with fix) is scheduled back in 2.6.27.

This is regression because 2.6.26 + two patches mentioned above suspend and
resume just fine.=20

> > System cannot be suspended - some task cannot be freezed. I think it is
> > khubd ...
>=20
> Yes, it is.
>=20
> It looks like khubd is running in a loop without checking TIF_FREEZE.
>=20
> > dmesg and config attached.
>=20
> Hm.  Is this 100% reproducible?
>=20

So far yes.


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