Date: Mon, 10 Oct 2011 17:25:18 +0200 From: Hans Petter Selasky <hselasky@freebsd.org> To: Adrian Chadd <adrian@freebsd.org> Cc: Garrett Cooper <yanegomi@gmail.com>, freebsd-current <freebsd-current@freebsd.org> Subject: Re: USB storage corruption/panic when doing file IO and unplugging (another, non-storage) device Message-ID: <201110101725.18195.hselasky@freebsd.org> In-Reply-To: <CAJ-Vmom1Mq7sRmGSftiEsvjGFAYHMSNcF7LtchLq33TiWhnRkg@mail.gmail.com> References: <CAGH67wTtLqVyKRynOHDF4yD7%2B6J38%2Bk507BUeTjsvrG6HuaAGw@mail.gmail.com> <CAJ-Vmom1Mq7sRmGSftiEsvjGFAYHMSNcF7LtchLq33TiWhnRkg@mail.gmail.com>
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On Friday 07 October 2011 08:32:40 Adrian Chadd wrote: > On 7 October 2011 13:55, Garrett Cooper <yanegomi@gmail.com> wrote: > >> Has anyone seen this before? > >> > >> This is _not_ plug/unplug the active storage device, or another > >> storage device. This is when doing IO on a storage device (whether the > >> root device or a media device) whilst plug/unplug a non-storage USB > >> device (wifi chipsets w/ no driver.) > > > > Yeah. Ran into it earlier on in the 9.x cycle with twa unplugging > > a USB keyboard when I was rebooting a machine; the panic was fixed in > > twa, not ukbd. I suppose my question is: does this only happen with > > USB, or is firewire affected, and why aren't the devices being > > properly masked against interrupts [in the same queue??] [by > > newbus???]? > > Let's wait for hps to get back to us. This seems like something he can > replicate very quickly. Hi, Could you send me the backtrace of the panic. USB is a broadcast system and connecting and disconnecting devices might cause interference. Make sure your driver is self powered. I have not seen this issue before. I'm using a USB disk every day. --HPS
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