Date: Sun, 26 Feb 2012 22:06:08 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-scsi@freebsd.org Subject: CAM layer gets stuck when sim->refcount > 0 at UMASS detach (10-current) Message-ID: <201202262206.08378.hselasky@c2i.net>
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Hi, When running a stress test on a USB mass storage device, the CAM layer will eventually block at detach, because the refcount is not going towards zero on the SIM structure. Test script: ugenX.Y is a mass storage device #!/bin/sh while true do usbconfig -d ugenX.Y reset echo "." done After a minute or two the printouts above stops because the CAM layer is not releasing the reference count, indicating a bug somewhere during probe of the newly attached device. Any patches, ideas or things you want me to test? Please CC me hence I'm not subscribed to this list. --HPS
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