12.0-BETA3 isp(4): exclusive sleep mutex CAM device lock (CAM device lock)

[Scott Long]

It’s harmless unless you run your machine under severe and sustained memory exhaustion.

Scott


> On Nov 2, 2018, at 8:15 AM, Harry Schmalzbauer <freebsd at omnilan.de> wrote:
> 
> Hello,
> 
> unnfortunately I can't determine if this is begnin, so I'd like to ask the experts:
> 
> uma_zalloc_arg: zone "64" with the following non-sleepable locks held:
> exclusive sleep mutex CAM device lock (CAM device lock) r = 0 (0xfffff8000f1424d0) locked @ /usr/local/share/deploy-tools/RELENG_12/src/sys/cam/cam_xpt.c:4309
> stack backtrace:
> #0 0xffffffff8060ead3 at witness_debugger+0x73
> #1 0xffffffff8060fa48 at witness_warn+0x448
> #2 0xffffffff808b6f18 at uma_zalloc_arg+0x38
> #3 0xffffffff8058773a at malloc+0x9a
> #4 0xffffffff8036f423 at nvlist_create+0x23
> #5 0xffffffff8030d597 at ctl_port_register+0x187
> #6 0xffffffff8031aa25 at ctlfeasync+0x405
> #7 0xffffffff802ca772 at xpt_async_process_dev+0x162
> #8 0xffffffff802c603d at xpt_async_process+0x15d
> #9 0xffffffff802c697e at xpt_done_process+0x35e
> #10 0xffffffff802c8a76 at xpt_done_td+0xf6
> #11 0xffffffff8056e094 at fork_exit+0x84
> #12 0xffffffff808f46de at fork_trampoline+0xe
> uma_zalloc_arg: zone "64" with the following non-sleepable locks held:
> exclusive sleep mutex CAM device lock (CAM device lock) r = 0 (0xfffff8000f1414d0) locked @ /usr/local/share/deploy-tools/RELENG_12/src/sys/cam/cam_xpt.c:4309
> stack backtrace:
> #0 0xffffffff8060ead3 at witness_debugger+0x73
> #1 0xffffffff8060fa48 at witness_warn+0x448
> #2 0xffffffff808b6f18 at uma_zalloc_arg+0x38
> #3 0xffffffff8058773a at malloc+0x9a
> #4 0xffffffff8036f423 at nvlist_create+0x23
> #5 0xffffffff8030d597 at ctl_port_register+0x187
> #6 0xffffffff8031aa25 at ctlfeasync+0x405
> #7 0xffffffff802ca772 at xpt_async_process_dev+0x162
> #8 0xffffffff802c603d at xpt_async_process+0x15d
> #9 0xffffffff802c697e at xpt_done_process+0x35e
> #10 0xffffffff802c8a76 at xpt_done_td+0xf6
> #11 0xffffffff8056e094 at fork_exit+0x84
> #12 0xffffffff808f46de at fork_trampoline+0xe
> 
> Thanks for hints,
> 
> -harry
> 
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