linux-kernel - Re: can we move USB_DEVICEFS to non-embedded?

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Message-ID: <21d7e9970907080420h41375e36q1efacb9f3555b9de@mail.gmail.com>
Date:	Wed, 8 Jul 2009 21:20:04 +1000
From:	Dave Airlie <airlied@...il.com>
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	Greg KH <gregkh@...e.de>, Jeff Chua <jeff.chua.linux@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Scott James Remnant <scott@...onical.com>,
	Dave Jones <davej@...hat.com>, Peter Jones <pjones@...hat.com>
Subject: Re: can we move USB_DEVICEFS to non-embedded?

On Wed, Jul 8, 2009 at 9:03 PM, Kay Sievers<kay.sievers@...y.org> wrote:
> On Wed, Jul 8, 2009 at 12:54, Dave Airlie<airlied@...il.com> wrote:
>
>> Okay can we revert this for a better reason? it seems to have unhidden a race
>> condition on booting some of my machines. I've booted some other machines
>> with the same USB disk and the same kernel fine.
>
> Are you sure? USBFS is for userspace USB drivers, booting from
> usb-storage devices should be fully handled by the kernel.
>

Yes, changing just this option means the difference between a bootable
and stuck in initrd system. maybe Peter knows if our initrd does something
otherwise I suspect we have a race that usbfs was hiding.

Dave.
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