Date: Wed, 18 Feb 2009 21:04:03 -0800 From: Andrew Thompson <thompsa@FreeBSD.org> To: Giorgos Keramidas <keramida@ceid.upatras.gr> Cc: FreeBSD Current <freebsd-current@freebsd.org>, Daichi GOTO <daichi@ongs.co.jp>, Masanori OZAWA <ozawa@ongs.co.jp>, Hans Petter Selasky <hselasky@c2i.net> Subject: Re: USB2: booting from usb memory issue, including a foolish patch Message-ID: <20090219050403.GB84647@citylink.fud.org.nz> In-Reply-To: <87skmb8564.fsf@kobe.laptop> References: <499CC89E.2040408@ongs.co.jp> <87skmb8564.fsf@kobe.laptop>
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On Thu, Feb 19, 2009 at 05:41:07AM +0200, Giorgos Keramidas wrote: > On Thu, 19 Feb 2009 11:49:02 +0900, Daichi GOTO <daichi@ongs.co.jp> wrote: > > Hi usb2 folks, first please give me a time to say congratulations! I'm > > very glad that usb2 is default usb stack right now :) > > > > Well but, bad news I have. > > > > I have known that usb2 stack have a issue around boot from usb > > devices. System has been engaging root filesystem mount treatment > > before completion of device proving in kernel main thread. It leads > > root mount fail, then system boot fails from usb device. > > > > So I have made a patch included. That patch sleeps 30 seconds before > > root mount treatment while a kernel thread doing usb2 device probing. > > > > Yes you know, very foolish patch but I have no idea to fix it in other > > way. If you have better ideas, please try and commit that. > > Delaying *all* boots for such a long time doesn't seem very good. > > It may be a good idea to patch usb2 to install a SYSINIT handler with > SI_SUB_CONFIGURE, so that it gets a chance to hook itself at the end of > the device configuration. I'll try to do this, unless Hans beats me to > it of course :) There has already been a thread about this on usb@, maybe have a read first. http://lists.freebsd.org/pipermail/freebsd-usb/2009-February/006242.html Andrew
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