linux-kernel - Re: Regression: USB is nfg after suspend/resume(RAM) cycle on Intel chipset

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Message-ID: <465C6E9B.2040605@rtr.ca>
Date:	Tue, 29 May 2007 14:19:07 -0400
From:	Mark Lord <lkml@....ca>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: Regression: USB is nfg after suspend/resume(RAM) cycle on Intel
 chipset

Linus Torvalds wrote:
> 
> On Tue, 29 May 2007, Mark Lord wrote:
>> Okay, just to make it trivial,
>> I've narrowed it down to only this commit from Alan Stern:
>>
>> 7ed92f1a149dddc3cb537ccd7441e98adac12c3e USB: make the autosuspend workqueue
>> thread freezable
> 
> Heh. Have I mentioned how much I *hate* those kernel threads being frozen?
> 
> Just for fun, could you try if the patch that just rips out the freezer 
> calls from the STR code just fixes the problem too (instead of reverting 
> that commit?)
> 
> It was done by Matthew Garrett <mjg59@...f.ucam.org>, and you should be 
> able to find it in the kernel archives under the subject
> 
> 	Re: pcmcia resume 60 second hang. Re: [patch 00/69] -stable review
> 	Message-ID: <20070527184402.GA21161@...f.ucam.org>

Okay, I tried that one, but the machine just hung on the VGA console screen
at suspend time.  No alt-sysrq or anything.  Power-cycled it to recover.

> and it would be interesting to hear if that just solves the problem for 
> you too.
> 
> There's a different (but related to all the same freezer problems) patch 
> by Rafael Wysocki <rjw@...k.pl>:
> 
> 	Re: [RFC][PATCH][EXPERIMENTAL] Make kernel threads nonfreezable by default
> 	Message-Id: <200705291415.31970.rjw@...k.pl>

I'll hunt for Rafael's patch next.
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