Date: Tue, 12 Jan 2021 13:10:48 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 136944] [ffs] [lor] bufwait/snaplk (fsync) Message-ID: <bug-136944-227-jlC8LZ8WBj@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-136944-227@https.bugs.freebsd.org/bugzilla/> References: <bug-136944-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D136944 ml@netfence.it changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ml@netfence.it --- Comment #5 from ml@netfence.it --- Just encountered this on a 12.2/amd64 vm while investigating #244048 (not s= ure wether this might be part of the cause for that). Of course, after so many years, the stack trace is slightly different. Jan 12 14:05:13 mksnap kernel: lock order reversal: Jan 12 14:05:13 mksnap kernel: 1st 0xfffffe0000827230 bufwait (bufwait) @ /usr/src/sys/ufs/ffs/ffs_vnops.c:283 Jan 12 14:05:13 mksnap kernel: 2nd 0xfffff800049661b0 snaplk (snaplk) @ /usr/src/sys/ufs/ffs/ffs_snapshot.c:2314 Jan 12 14:05:13 mksnap kernel: stack backtrace: Jan 12 14:05:13 mksnap kernel: #0 0xffffffff80604bb3 at witness_debugger+0x= 73 Jan 12 14:05:13 mksnap kernel: #1 0xffffffff806048fe at witness_checkorder+0xa9e Jan 12 14:05:13 mksnap kernel: #2 0xffffffff8056c0ed at lockmgr_xlock_hard+= 0x6d Jan 12 14:05:13 mksnap kernel: #3 0xffffffff8056d0d0 at __lockmgr_args+0x7a0 Jan 12 14:05:13 mksnap kernel: #4 0xffffffff807a0df6 at ffs_copyonwrite+0x1= 76 Jan 12 14:05:13 mksnap kernel: #5 0xffffffff807c223c at ffs_geom_strategy+0= x8c Jan 12 14:05:13 mksnap kernel: #6 0xffffffff807d39c3 at ufs_strategy+0x83 Jan 12 14:05:13 mksnap kernel: #7 0xffffffff808b9911 at VOP_STRATEGY_APV+0x= f1 Jan 12 14:05:13 mksnap kernel: #8 0xffffffff80647114 at bufstrategy+0x44 Jan 12 14:05:13 mksnap kernel: #9 0xffffffff80646fb0 at bufwrite+0x230 Jan 12 14:05:13 mksnap kernel: #10 0xffffffff807c406e at ffs_syncvnode+0x2be Jan 12 14:05:13 mksnap kernel: #11 0xffffffff8079bd04 at ffs_snapshot+0x914 Jan 12 14:05:13 mksnap kernel: #12 0xffffffff807bfe5a at ffs_mount+0xb3a Jan 12 14:05:13 mksnap kernel: #13 0xffffffff80661a54 at vfs_domount+0x8d4 Jan 12 14:05:13 mksnap kernel: #14 0xffffffff80660b27 at vfs_donmount+0x7e7 Jan 12 14:05:13 mksnap kernel: #15 0xffffffff80660312 at sys_nmount+0xf2 Jan 12 14:05:13 mksnap kernel: #16 0xffffffff808418b7 at amd64_syscall+0x2e7 Jan 12 14:05:13 mksnap kernel: #17 0xffffffff808193de at fast_syscall_common+0xf8 --=20 You are receiving this mail because: You are the assignee for the bug.=
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