Date: Sat, 17 Aug 2013 19:41:39 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Hans Petter Selasky <hps@bitfrost.no> Cc: Alexander Panyushkin <vsityz@gmail.com>, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: USB no proper work Message-ID: <520FA7C3.2060708@FreeBSD.org> In-Reply-To: <520F16B6.1070106@bitfrost.no> References: <520E8602.5050408@gmail.com> <520E8842.4020609@bitfrost.no> <520E8DE1.1090609@gmail.com> <520F16B6.1070106@bitfrost.no>
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On 17.08.2013 09:22, Hans Petter Selasky wrote: > On 08/16/13 22:38, Alexander Panyushkin wrote: >> ========This deatach========== >> Aug 16 23:24:05 scorpion kernel: ugen1.2: <Generic> at usbus1 >> (disconnected) >> Aug 16 23:24:05 scorpion kernel: umass0: at uhub0, port 4, addr 2 >> (disconnected) >> Aug 16 23:24:05 scorpion kernel: (da0:umass-sim0:0:0:0): lost device - 0 >> outstanding, 2 refs > > Hi, > > The 2 refs is a problem that someone is keeping the device opened. > That's the problem and that's what is stopping the enumeration thread. 2 refs may be not a CAM bug. One of them can be GEOM reference and another is open device reference. What were the file systems on the device and were they active/mounted during detach? Just recently I tested hot-plug device with ZFS on 10-CURRENT using USB sticks and found no problems in either CAM or USB stack around device disconnect. -- Alexander Motin
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