Date: Mon, 23 Nov 2015 15:39:43 -0500 From: Kurt Lidl <lidl@pix.net> To: FreeBSD-Current <freebsd-current@freebsd.org> Subject: New LOR in zfs? Message-ID: <5653798F.1060708@pix.net>
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I installed a build of r291086 on a machine today (previously, the machine had been running 10/stable). I ran the following two commands just after rebooting with the new user-land bits: root@ton-95: df Filesystem 1K-blocks Used Avail Capacity Mounted on sys/ROOT/default 18061924 804940 17256984 4% / devfs 1 1 0 100% /dev tmpfs 65536 8 65528 0% /tmp sys/home 17257108 124 17256984 0% /home sys/local 17283924 26940 17256984 0% /usr/local sys/obj.4 19440624 2183640 17256984 11% /usr/obj sys/obj.1 19440440 2183456 17256984 11% /usr/obj.1 sys/obj.2 19588696 2331712 17256984 12% /usr/obj.2 sys/obj.3 19588636 2331652 17256984 12% /usr/obj.3 sys/ports 17257080 96 17256984 0% /usr/ports sys/src 19740468 2483484 17256984 13% /usr/src sys/var 17358024 101040 17256984 1% /var root@ton-96: zfs set mountpoint=/usr/obj.4 sys/obj.4 I got a LOR (new to me, at any rate) on the console: lock order reversal: 1st 0xfffff8000612da38 zfs (zfs) @ /usr/src/sys/kern/vfs_mount.c:1224 2nd 0xfffff8000612d4b0 zfs_gfs (zfs_gfs) @ /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/gfs.c:494 stack backtrace: #0 0xc05b1e3c at __lockmgr_args???=?-~????+0xa3c #1 0xc06a9118 at vop_std???=?-~????lock+0x38 #2 0xc09e8164 at VOP_???=?-~????LOCK1_APV+0x104 #3 0xc06d125c a???=?-~????t _vn_lock+0x9c #4 0xc12a7b04 a???=?-~????t gfs_file_create+0x64 #5 0xc12???=?-~????a7c14 at gfs_dir_create+0x14 #6???=?-~???? 0xc139fc14 at zfsctl_mknode_sn???=?-~????apdir+0x54 #7 0xc12a82bc at gfs???=?-~????_dir_lookup+0x31c #8 0xc139f6cc???=?-~???? at zfsctl_root_lookup+0x12c #9???=?-~???? 0xc139f7b4 at zfsctl_umount_sn???=?-~????apshots+0x54 #10 0xc13bb44c at ???=?-~????zfs_umount+0x4c #11 0xc06b34a8 ???=?-~????at dounmount+0xbc8 #12 0xc06b38???=?-~????f0 at sys_unmount+0x410 #13 0xc???=?-~????09de004 at syscall+0x3c4 The machine in question is a sparc4u machine, but I do not think it matters. -Kurt
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