kern/142878: [zfs] [vfs] lock order reversal

[Andrei V. Lavreniyuk]

The following reply was made to PR kern/142878; it has been noted by GNATS.

From: "Andrei V. Lavreniyuk" <andy.lavr at reactor-xg.kiev.ua>
To: bug-followup at FreeBSD.org, dmitry2006 at yandex.ru
Cc:  
Subject: Re: kern/142878: [zfs] [vfs] lock order reversal
Date: Fri, 29 Jan 2010 09:56:53 +0200

 FreeBSD opensolaris.technica-03.local 8.0-STABLE FreeBSD 8.0-STABLE #0: 
 Fri Jan 29 06:12:47 UTC 2010 
 root at opensolaris.technica-03.local:/usr/obj/usr/src/sys/SMP64R  amd64
 
 
 
 
 lock order reversal:
 1st 0xffffff00093727f8 zfs (zfs) @ /usr/src/sys/kern/vfs_mount.c:1058
 2nd 0xffffff000933f7f8 devfs (devfs) @ /usr/src/sys/kern/vfs_subr.c:2091
 KDB: stack backtrace:
 db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
 _witness_debugger() at _witness_debugger+0x2e
 witness_checkorder() at witness_checkorder+0x80b
 __lockmgr_args() at __lockmgr_args+0xcdd
 vop_stdlock() at vop_stdlock+0x39
 VOP_LOCK1_APV() at VOP_LOCK1_APV+0xbf
 _vn_lock() at _vn_lock+0x47
 vget() at vget+0x7b
 devfs_allocv() at devfs_allocv+0x100
 devfs_root() at devfs_root+0x48
 vfs_donmount() at vfs_donmount+0xfa1
 nmount() at nmount+0x63
 syscall() at syscall+0x1e6
 Xfast_syscall() at Xfast_syscall+0xe1
 --- syscall (378, FreeBSD ELF64, nmount), rip = 0x8007aa6bc, rsp = 
 0x7fffffffdd28, rbp = 0x800a06048 ---
 
 
 
 
 -- 
   Best regards, Andrei V. Lavreniyuk.