Re: kern/42737: sbp temporary detachment feature causes deadlocks

[Taylor R Campbell <campbell%mumble.net@localhost>]

The following reply was made to PR kern/42737; it has been noted by GNATS.

From: Taylor R Campbell <campbell%mumble.net@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/42737: sbp temporary detachment feature causes deadlocks
Date: Thu, 4 Feb 2010 00:35:55 -0500

 Forgot to add: I entered ddb and ran `t/t 0t87' to get a trace for
 process 87, one of the `disklabel sd0' processes, and copied the
 output by hand.  (No doubt I made some errors in transcription.)
 
 db{0}> t/t 0t87
 trace: pid 87 lid 1 at 0xcbfa19ac
 sleepq_block(0,0,c0a26161,c0a882fc,ca95f4d0,cbfd2458,0,cd4b0a7c,75,40) at n=
 etbsd:sleepq_block+0xeb
 turnstile_block(cd4b0a64,1,cebab400,c0a882fc,cc561e4c,1,cbfa1a4c,c04cd27d,2=
 0000020,cd4b0a64) at netbsd:turnstile_block+0x1a5
 mutex_vector_enter(cebab400,0,0,1,d0818e64,cebab400,cbfa1aec,c03d8988,d0818=
 f04,3) at netbsd:mutex_vector_enter+0x398
 sdopen(d03,1,2000,cbfd22a0,2000,1,6,d0818e64,cbb94268,0) at netbsd:sdopen+0=
 x8c
 cdev_open(d03,1,2000,cbfd22a0,4,1a0,0,5,cbfd22a0,d03) at netbsd:cdev_open+0=
 x99
 spec_open(cbfa1b88,3,1,c048b237,6,c0826f60,d0818e64,1,d1f05840,0) at netbsd=
 :spec_open+0x165
 VOP_OPEN(d0818e64,1,d1f05840,1,cc465ba4,0,0,d0818e64,cbfd22a0,d1f05840) at =
 netbsd:VOP_OPEN+0x6c
 vn_open(cbfa1c78,1,40,c0474d12,c0b3bac0,cd7e996c,0,c04752d9,cbfa1cdc,cbb25c=
 00) at netbsd:vn_open+0x259
 sys_open(cbfd22a0,cbfa1d00,cbfa1d28,8052640,0,64,8052640,0,0,bbbf6983) at n=
 etbsd:sys_open+0xc0
 syscall(cbfa1d48,b3,ab,1f,1f,8052640,64,bfbfe948,bbbe68b8,bbbd5840) at netb=
 sd:syscall+0xbd