Date: Sun, 28 Feb 2010 13:59:47 +0900 From: Norikatsu Shigemura <nork@FreeBSD.org> To: Alexander Motin <mav@FreeBSD.org> Cc: freebsd-arm@FreeBSD.org, freebsd-current@FreeBSD.org, Shigemura <nork@FreeBSD.org>, Norikatsu Subject: Re: ATA_CAM-ed mvsata(4) on OpenRD-client Message-ID: <20100228135947.acf387df.nork@FreeBSD.org> In-Reply-To: <20100228133145.e0c8bc68.nork@ninth-nine.com> References: <20100218023945.848cd01a.nork@FreeBSD.org> <4B7EF63C.7030008@FreeBSD.org> <20100226014718.c0a07c84.nork@FreeBSD.org> <20100228133145.e0c8bc68.nork@ninth-nine.com>
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Hi mav.
On Sun, 28 Feb 2010 13:31:45 +0900
Norikatsu Shigemura <nork@ninth-nine.com> wrote:
> I didn't know what's happen. So I'll report code trace and
> cam related struct dump with ddb which I made.
Code trace with printf debug:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
periphdriver_init() @sys/cam/cam_periph.c
-> adainit() @sys/cam/ata/ata_da.c OK
-> probe_periph_init() @sys/cam/scsi/scsi_xpt.c OK
-> pmpinit() @sys/cam/ata/ata_pmp.c FREEZE
-> xpt_register_async() @sys/cam/cam_xpt.c
-> xpt_for_all_devices() @sys/cam/cam_xpt.c
-> xptbustraverse() @sys/cam/cam_xpt.c
- - - - - in xptbustraverse() - - - - -
for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xsoftc.xpt_busses));
bus != NULL;
bus = next_bus) {
next_bus = TAILQ_NEXT(bus, links);
mtx_unlock(&xsoftc.xpt_topo_lock);
-> CAM_SIM_LOCK(bus->sim);
freeze at this point, because of not catch lock, in the first loop.
retval = tr_func(bus, arg);
CAM_SIM_UNLOCK(bus->sim);
if (retval == 0)
return(retval);
mtx_lock(&xsoftc.xpt_topo_lock);
}
- - - - - in xptbustraverse() - - - - -
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
So I dumped following mtx, cam_eb IN (0xc36c88c0, 0xc3770840,
0xc35df5c0)->sim.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
db> show lock 0xc35e5974
class: spin mutex
name:
flags: {SPIN}
state: {OWNED, CONTESTED}
owner: 0xc36c8d00 (tid 0, pid -1062090240, "")
db> show lock 0xc35e5774
class: sleep mutex
name: ATA state lock
flags: {DEF}
state: {UNOWNED}
db> show lock 0xc0be5204
class: sleep mutex
name: XPT lock
flags: {DEF}
state: {UNOWNED}
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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