linux-kernel - Re: [linux-usb-devel] OOM and USB, latest Linux 2.6

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Message-ID: <Pine.LNX.4.44L0.0702171634140.18992-100000@netrider.rowland.org>
Date:	Sat, 17 Feb 2007 16:36:46 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Dan Aloni <da-x@...atomic.org>
cc:	Linux Kernel List <linux-kernel@...r.kernel.org>,
	<linux-usb-devel-bounces@...ts.sourceforge.net>
Subject: Re: [linux-usb-devel] OOM and USB, latest Linux 2.6

On Sat, 17 Feb 2007, Dan Aloni wrote:

> You are right, I looked over this state with kdb, and usb-storage
> waited in usb_stor_bulk_transfer_sg, which does pass GFP_NOIO
> at this scenario.
...

> BTW, soft-rebooting the machine in that state made the USB
> storage device (LEXAR,  JD LIGHTNING II) inaccessible to the
> BIOS. I had to do a complete power cycle in order or the BIOS
> to see it again.

That's the fault of the BIOS and/or the Lexar device.  The BIOS ought to 
do a complete reset of the USB controller and a reset of the device.  If 
the device remains unusable after that, there isn't anything we can do 
about it.

Alan Stern

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