linux-kernel - Re: [regression] openSUSE 12.2 stable kernel 3.7.8-1 big USB 2.0 slowdown

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Date:	Tue, 19 Feb 2013 10:16:40 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	Anja Nützel <Anja@...tzel-hh.de>
CC:	Alan Stern <stern@...land.harvard.edu>,
	Jeff Mahoney <jeffm@...e.com>, mmarek@...e.cz,
	Dieter Nützel <Dieter@...tzel-hh.de>,
	stable <stable@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [regression] openSUSE 12.2 stable kernel 3.7.8-1 big USB 2.0
 slowdown

On 02/19/2013 03:56 AM, Alan Stern wrote:
> On Mon, 18 Feb 2013, Jiri Slaby wrote:
> 
>> On 02/18/2013 06:25 AM, Anja Nützel wrote:
>>> Maybe it startet with 3.7.7.
>>> I could copy several MB onto my USB 2.0 sticks with 3.7.6. (I think).
>>> Even with full speed.
>>>
>>> With openSUSE 12.2 DVD (kernel 3.4.x) it works OK, too.
>>>
>>> Now it degrates to 12 mbits (full-speed USB only).
>>
>> This is an upstream 3.7.7 stable regression, I think. Some of these
>> patches perhaps:
>> d7da098 USB: EHCI: fix for leaking isochronous data
>> caa891a USB: storage: optimize to match the Huawei USB storage devices
>> and support new switch command
>> 08b4bfd USB: storage: Define a new macro for USB storage match rules
>> 390077b usb: Using correct way to clear usb3.0 device's remote wakeup
>> feature.
>> 93dffb7 USB: EHCI: fix bug in scheduling periodic split transfers
>> bf79379 USB: EHCI: fix timer bug affecting port resume
>> d01875f USB: EHCI: unlink one async QH at a time
>> 269ef9f USB: EHCI: remove ASS/PSS polling timeout
>>
>> Alan, any ideas?
> 
> A lot of people have reported problems caused by the last one 
> (269ef9f).  I haven't had time to investigate yet (just got back from 
> vacation).

I reverted that one in:
http://labs.suse.cz/jslaby/bug-804367/

Anja, could you test that kernel?

-- 
js
suse labs
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