Date: Thu, 3 Nov 2011 21:06:20 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-current@freebsd.org Cc: Jan Henrik Sylvester <me@janh.de> Subject: Re: USB3 express card panics on 9.0-RC1 Message-ID: <201111032106.20278.hselasky@c2i.net> In-Reply-To: <201111032104.23332.hselasky@c2i.net> References: <4EB1602C.6030807@janh.de> <201111031942.30498.hselasky@c2i.net> <201111032104.23332.hselasky@c2i.net>
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On Thursday 03 November 2011 21:04:23 Hans Petter Selasky wrote: > On Thursday 03 November 2011 19:42:30 Hans Petter Selasky wrote: > > On Thursday 03 November 2011 13:30:19 Jan Henrik Sylvester wrote: > > > After reading http://www.unixguide.net/freebsd/faq/18.13.shtml , I > > > found that ffffffff806e8040 t usb_process is the last symbol before > > > instruction pointer = 0x20:0xffffffff806e80aa. Does this help? > > > > Try add: > > > > options KDB # Enable kernel debugger support. > > options DDB # Support DDB. > > Hi, > > Looks like it panics at: > > mtx_lock(up->up_mtx); > > In "usb_process()" which is created by the "xhci0" instance. > > I would really like to see a dump of "up" and "up_mtx" because I cannot see > how this can happen. > > Have you seen any USB errors in the dmesg up to the point of this panic? > > --HPS Here is a snippet of assembly code: ffffffff806e808b: 48 8b 13 mov (%rbx),%rdx ffffffff806e808e: 83 6a 0c 01 subl $0x1,0xc(%rdx) ffffffff806e8092: e8 19 4e 42 00 callq ffffffff80b0ceb0 <spinlock_exit> ffffffff806e8097: 65 48 8b 34 25 00 00 mov %gs:0x0,%rsi ffffffff806e809e: 00 00 ffffffff806e80a0: 49 8b 7c 24 40 mov 0x40(%r12),%rdi ffffffff806e80a5: b8 04 00 00 00 mov $0x4,%eax ffffffff806e80aa: f0 48 0f b1 77 18 lock cmpxchg %rsi,0x18(%rdi) ^^^^^ fault line ffffffff806e80b0: 0f 94 c0 sete %al ffffffff806e80b3: 84 c0 test %al,%al ffffffff806e80b5: 0f 84 5f 01 00 00 je ffffffff806e821a <usb_process+0x1da> ffffffff806e80bb: 4d 8d 6c 24 10 lea 0x10(%r12),%r13 ffffffff806e80c0: 4d 8d 74 24 20 lea 0x20(%r12),%r14 ffffffff806e80c5: 49 89 5c 24 38 mov %rbx,0x38(%r12) --HPS
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