On Mon, Jan 09, 2017 at 12:32:28AM +0000, Anindya Mukherjee wrote:
> Hi, I'm running 12.0-current and noticed a LOR message from WITNESS which I 
> couldn't find a report about. I looked at 
> http://sources.zabbadoz.net/freebsd/lor.html, among other places.
> 
> system details:
> root@triskelion:~ # uname -a
> FreeBSD triskelion 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r311461: Thu Jan  5 
> 22:46:38 UTC 2017     
> r...@releng3.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64
> root@triskelion:~ # freebsd-version
> 12.0-CURRENT
> 
> 
> WITNESS report:
> lock order reversal:
>  1st 0xfffff8002e8049a0 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2598
>  2nd 0xfffffe01e7ce9b40 bufwait (bufwait) @ 
> /usr/src/sys/ufs/ffs/ffs_vnops.c:277
>  3rd 0xfffff8002ec7b9a0 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2598
> stack backtrace:
> #0 0xffffffff80aa6fd0 at witness_debugger+0x70
> #1 0xffffffff80aa6ed3 at witness_checkorder+0xde3
> #2 0xffffffff80a20c15 at __lockmgr_args+0x725
> #3 0xffffffff80d06fc5 at ffs_lock+0xa5
> #4 0xffffffff8101c0c0 at VOP_LOCK1_APV+0xe0
> #5 0xffffffff80b1a6aa at _vn_lock+0x9a
> #6 0xffffffff80b0ac94 at vget+0x64
> #7 0xffffffff80afd19c at vfs_hash_get+0xcc
> #8 0xffffffff80d02e5e at ffs_vgetf+0x3e
> #9 0xffffffff80cf9787 at softdep_sync_buf+0xc37
> #10 0xffffffff80d07c51 at ffs_syncvnode+0x2a1
> #11 0xffffffff80d06e60 at ffs_fsync+0x20
> #12 0xffffffff8101b110 at VOP_FSYNC_APV+0xe0
> #13 0xffffffff80d0f2f0 at ufs_direnter+0x870
> #14 0xffffffff80d18050 at ufs_makeinode+0x5c0
> #15 0xffffffff80d13d7a at ufs_create+0x3a
> #16 0xffffffff810199ca at VOP_CREATE_APV+0xda
> #17 0xffffffff80b19f77 at vn_open_cred+0x2c7
> 
> This is based on the FreeBSD-12.0-CURRENT-amd64-20170105-r311461-memstick.img 
> installer. Known issue?

You do not think it looks like http://sources.zabbadoz.net/freebsd/lor/238.html 
?

-Ben
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