[Bug 235852] panic: handle_written_filepage: not started

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235852

            Bug ID: 235852
           Summary: panic: handle_written_filepage: not started
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Keywords: panic, stress2
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: pho at FreeBSD.org

This is a *very* old problem. The test scenario is FFS snapshot:

20190218 23:05:29 all (1/1): pageout.sh
panic: handle_written_filepage: not started
cpuid = 3
time = 1550527654
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00aa9482d0
vpanic() at vpanic+0x1b4/frame 0xfffffe00aa948330
panic() at panic+0x43/frame 0xfffffe00aa948390
handle_written_filepage() at handle_written_filepage+0x3e/frame
0xfffffe00aa948400
softdep_disk_write_complete() at softdep_disk_write_complete+0xdd/frame
0xfffffe00aa9484a0
bufdone() at bufdone+0x3bb/frame 0xfffffe00aa948520
ufs_strategy() at ufs_strategy+0x83/frame 0xfffffe00aa948550
VOP_STRATEGY_APV() at VOP_STRATEGY_APV+0x90/frame 0xfffffe00aa948570
bufstrategy() at bufstrategy+0x44/frame 0xfffffe00aa9485a0
bufwrite() at bufwrite+0x249/frame 0xfffffe00aa9485f0
ffs_syncvnode() at ffs_syncvnode+0x2ae/frame 0xfffffe00aa948670
ffs_fsync() at ffs_fsync+0x22/frame 0xfffffe00aa9486b0
VOP_FSYNC_APV() at VOP_FSYNC_APV+0x88/frame 0xfffffe00aa9486d0
ufs_remove() at ufs_remove+0xdf/frame 0xfffffe00aa948730
VOP_REMOVE_APV() at VOP_REMOVE_APV+0xac/frame 0xfffffe00aa948750
kern_unlinkat() at kern_unlinkat+0x1e7/frame 0xfffffe00aa948990
amd64_syscall() at amd64_syscall+0x291/frame 0xfffffe00aa948ab0

https://people.freebsd.org/~pho/stress/log/pageout-4.txt
https://people.freebsd.org/~pho/kernel+vmcore.20.r344247.mercat1.txz

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