[Bug 248732] LOR on a recent -CURRENT between UFS and devfs

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248732

            Bug ID: 248732
           Summary: LOR on a recent -CURRENT between UFS and devfs
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: gbe at FreeBSD.org

On an ARM64 PRi4B I get the following LOR:

The system is mounting a NFS share very late, if this leads more towards
solving this problem.

lock order reversal:
 1st 0xfffffd0061a35c10 ufs (ufs, lockmgr) @
/tank/nfs_public/tiny/src/sys/kern/vfs_mount.c:1008
 2nd 0xfffffd0061a3b450 devfs (devfs, lockmgr) @
/tank/nfs_public/tiny/src/sys/kern/vfs_mount.c:1019
lock order devfs -> ufs established at:
#0 0xffff00000040eeec at witness_lock_order_add+0xec
#1 0xffff00000040e4e0 at witness_checkorder+0x23c
#2 0xffff000000380ff8 at lockmgr_lock_flags+0x150
#3 0xffff0000005dea68 at ffs_lock+0x68
#4 0xffff0000006dc560 at VOP_LOCK1_APV+0x40
#5 0xffff00000048684c at VOP_LOCK1+0x2c
#6 0xffff000000485578 at _vn_lock+0x38
#7 0xffff00000046c54c at vfs_domount_first+0x440
#8 0xffff000000469d14 at vfs_domount+0x270
#9 0xffff000000469040 at vfs_donmount+0x6cc
#10 0xffff00000046bb1c at kernel_mount+0x54
#11 0xffff00000046e664 at parse_mount+0x270
#12 0xffff00000046d7b8 at vfs_mountroot_parse+0xf4
#13 0xffff00000046d2d4 at vfs_mountroot+0x25c
#14 0xffff000000349f7c at start_init+0x2c
#15 0xffff00000036e22c at fork_exit+0x80
lock order ufs -> devfs attempted at:
#0 0xffff00000040e954 at witness_checkorder+0x6b0
#1 0xffff0000003823e4 at lockmgr_xlock+0x50
#2 0xffff000000462294 at vop_lock+0x7c
#3 0xffff0000006dc560 at VOP_LOCK1_APV+0x40
#4 0xffff00000048684c at VOP_LOCK1+0x2c
#5 0xffff000000485578 at _vn_lock+0x38
#6 0xffff00000046c54c at vfs_domount_first+0x440
#7 0xffff000000469d14 at vfs_domount+0x270
#8 0xffff000000469040 at vfs_donmount+0x6cc
#9 0xffff000000468920 at sys_nmount+0x60
#10 0xffff0000006807f0 at syscallenter+0x2c8
#11 0xffff000000680170 at svc_handler+0x4c
#12 0xffff00000067ff80 at do_el0_sync+0xf0
#13 0xffff000000667224 at handle_el0_sync+0x90

-- 
You are receiving this mail because:
You are the assignee for the bug.