Re: LORs on 8-current kernel with 7-stable world

Le 27 Dec 2008 22:07:12 +0100,
"Arno J. Klaassen" <arno_at_heho.snv.jussieu.fr> a écrit :

> Hello,
> 
> I get these when running a  8-current kernel with 7-stable world.
> I can'f access http://sources.zabbadoz.net/freebsd/lor.html
> to see if they are known.

> lock order reversal:
>  1st 0xfffffffe68494f20 bufwait (bufwait)
> _at_ /raid1/bsd/src-current/sys/kern/vfs_bio.c:2443 2nd
> 0xffffff0001c7d000 dirhash (dirhash)
> _at_ /raid1/bsd/src-current/sys/ufs/ufs/ufs_dirhash.c:263 KDB: stack
> backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
> _witness_debugger() at _witness_debugger+0x65 witness_checkorder() at
> witness_checkorder+0x859 _sx_xlock() at _sx_xlock+0x55
> ufsdirhash_acquire() at ufsdirhash_acquire+0x33
> ufsdirhash_remove() at ufsdirhash_remove+0x16
> ufs_dirremove() at ufs_dirremove+0x181
> ufs_remove() at ufs_remove+0x92
> VOP_REMOVE_APV() at VOP_REMOVE_APV+0x93
> kern_unlinkat() at kern_unlinkat+0x249
> linux_unlinkat() at linux_unlinkat+0xa6
> ia32_syscall() at ia32_syscall+0x1ab
> Xint0x80_syscall() at Xint0x80_syscall+0x60
> --- syscall (301, Linux ELF32, linux_unlinkat), rip = 0x28126968, rsp
> = 0xffffd4e8, rbp = 0xffffd508 ---

I see this one on a 'pure' CURRENT
lock order reversal:
 1st 0xc297ba60 bufwait (bufwait) _at_ /usr/src/sys/kern/vfs_bio.c:2443
 2nd 0xc2ec8c00 dirhash (dirhash)
_at_ /usr/src/sys/ufs/ufs/ufs_dirhash.c:263 KDB: stack backtrace:
db_trace_self_wrapper(c080b620,d6108778,c05aaf45,4,c08070aa,...) at
db_trace_self_wrapper+0x26
kdb_backtrace(4,c08070aa,c2c0f128,c2c11d08,d61087d4,...) at
kdb_backtrace+0x29
_witness_debugger(c080e0d7,c2ec8c00,c082aef4,c2c11d08,c082ab8d,...) at
_witness_debugger+0x25
witness_checkorder(c2ec8c00,9,c082ab8d,107,0,...) at
witness_checkorder+0x839
_sx_xlock(c2ec8c00,0,c082ab8d,107,c31010f0,...) at _sx_xlock+0x85
ufsdirhash_acquire(c297ba00,cde06800,200,cde06818,d61088a4,...) at
ufsdirhash_acquire+0x35
ufsdirhash_add(c31010f0,d61088ec,818,d6108890,d6108894,...) at
ufsdirhash_add+0x13
ufs_direnter(c2edd10c,c31cd10c,d61088ec,d6108bd4,0,...) at
ufs_direnter+0x729
ufs_makeinode(d6108bd4,d6108acc,d6108acc,d6108a34,c07d0295,...) at
ufs_makeinode+0x519
ufs_create(d6108acc,d6108acc,0,d6108acc,d6108ba8,...) at
ufs_create+0x30 VOP_CREATE_APV(c0876c20,d6108acc,2,c0801ca7,3,...) at
VOP_CREATE_APV+0xa5
vn_open_cred(d6108ba8,d6108c5c,1e4,c31a5800,c31922a0,...) at
vn_open_cred+0x1d0 vn_open(d6108ba8,d6108c5c,1e4,c31922a0,246,...) at
vn_open+0x33 kern_openat(c2e81000,ffffff9c,bfbfe640,0,a02,...) at
kern_openat+0x110 kern_open(c2e81000,bfbfe640,0,a01,1e4,...) at
kern_open+0x35 open(c2e81000,d6108cf8,c,c080ec0b,c0854438,...) at
open+0x30 syscall(d6108d38) at syscall+0x2a3 Xint0x80_syscall() at
Xint0x80_syscall+0x20 --- syscall (5, FreeBSD ELF32, open), eip =
0x2075d2b3, esp = 0xbfbfdf6c, ebp = 0xbfbfdf98 ---