Re: kern/51877: carp related panic during shutdown

[Ryota Ozaki <ozaki-r%netbsd.org@localhost>]

The following reply was made to PR kern/51877; it has been noted by GNATS.

From: Ryota Ozaki <ozaki-r%netbsd.org@localhost>
To: Hauke Fath <hf%spg.tu-darmstadt.de@localhost>
Cc: "gnats-bugs%NetBSD.org@localhost" <gnats-bugs%netbsd.org@localhost>, kern-bug-people%netbsd.org@localhost, 
	gnats-admin%netbsd.org@localhost
Subject: Re: kern/51877: carp related panic during shutdown
Date: Tue, 17 Jan 2017 19:15:36 +0900

 On Tue, Jan 17, 2017 at 6:59 PM, Hauke Fath <hf%spg.tu-darmstadt.de@localhost> wrote:
 > On Tue, 17 Jan 2017 13:41:01 +0900, Ryota Ozaki wrote:
 >> The mutex error happened because uvm_fault_internal tries to hold
 >> a rwlock with holding a spin mutex. Can you identify the spin mutex
 >> by dissembling the kernel?
 >
 > Attached.
 
 Hmm, turnstile_lookup. I didn't know a spin mutex is used in
 an adaptive mutex...
 
 Anyway one more thing. Could you check where mutex_tryenter+0x12 is?
 (objdump -d netbsd |grep -A 30 'mutex_tryenter>:' or something)
 
 Thanks,
   ozaki-r