Date: Fri, 6 Apr 2012 11:16:53 -0500 From: Terence Telkamp <Terence_Telkamp@DELL.com> To: "freebsd-usb@freebsd.org" <freebsd-usb@freebsd.org> Subject: Impact of changes made to umass.c at r232358 Message-ID: <975552A94CBC0F4DA60ED7B36C949CBA03DB0C8BA5@shandy.Beer.Town>
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I am seeing a kernel panic in FreeBSD 8.1, which is reproduced after physically attaching and detaching a USB device several times. The kernel debugger shows that the panic happens in camisr where the cam_sim and its associated mutex are clearly destroyed. sim->refcount is 0, sim->softc is 1 (UMASS_GONE), and the sim->mtx is destroyed (mtx_lock = 6). This looks very similar to FreeBSD PR kern/153514, which is unfortunately unresolved. http://www.freebsd.org/cgi/query-pr.cgi?pr=153514 Is it possible that the changes made to umass.c at r232358 might fix this issue? Terence Telkamp Storage Development Associate Engineer II Dell | Compellent
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