Date: Fri, 7 Oct 2011 12:30:01 +0800 From: Adrian Chadd <adrian@freebsd.org> To: freebsd-current <freebsd-current@freebsd.org> Cc: Hans Petter Selasky <hselasky@freebsd.org> Subject: USB storage corruption/panic when doing file IO and unplugging (another, non-storage) device Message-ID: <CAJ-Vmo=0_X1-jZ%2BqNXT-BjCUrF%2B6KQMXmJXRphpT0tZ20hKEDA@mail.gmail.com>
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Hi, I've noticed a strange issue with 9.0-BETA3. I haven't tried this on any previous 9.0 installs, I'm sorry, so I don't know when it began. If I'm doing some disk IO (say svn checkout, kernel building, watching a movie) on a USB device, whilst adding/removing non-storage USB devices (specifically here, unsupported wifi devices so I can get their device/vendor IDs), I reliably see failed read/write IO transactions. This ends up causing an eventual panic. 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.) Thanks, Adrian
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