Date: Sun, 02 Mar 2014 09:58:45 -0600 From: Bryan Drewery <bdrewery@FreeBSD.org> To: John Baldwin <jhb@freebsd.org>, freebsd-current@freebsd.org Subject: Re: panic: lockmgr still held [tmpfs] [vm_map_remove()->vdropl()] (r262186: Thu Feb 20) Message-ID: <53135535.30707@FreeBSD.org> In-Reply-To: <201402281618.57291.jhb@freebsd.org> References: <53109ACB.20102@FreeBSD.org> <201402281618.57291.jhb@freebsd.org>
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On 2/28/2014 3:18 PM, John Baldwin wrote:
> On Friday, February 28, 2014 9:18:51 am Bryan Drewery wrote:
>> While using poudriere:
>>
>>> Unread portion of the kernel message buffer:
>>> panic: lockmgr still held
>>> cpuid = 12
>>> KDB: stack backtrace:
>>> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe124804f7a0
>>> kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe124804f850
>>> vpanic() at vpanic+0x126/frame 0xfffffe124804f890
>>> kassert_panic() at kassert_panic+0x139/frame 0xfffffe124804f900
>>> lockdestroy() at lockdestroy+0x3b/frame 0xfffffe124804f920
>>> vdropl() at vdropl+0x1c8/frame 0xfffffe124804f960
>>> vm_object_deallocate() at vm_object_deallocate+0x10b/frame 0xfffffe124804f9c0
>>> vm_map_process_deferred() at vm_map_process_deferred+0x89/frame 0xfffffe124804f9f0
>>> vm_map_remove() at vm_map_remove+0xc8/frame 0xfffffe124804fa20
>>> vmspace_exit() at vmspace_exit+0xc9/frame 0xfffffe124804fa60
>>> exit1() at exit1+0x541/frame 0xfffffe124804fad0
>>> sys_sys_exit() at sys_sys_exit+0xe/frame 0xfffffe124804fae0
>>> ia32_syscall() at ia32_syscall+0x270/frame 0xfffffe124804fbf0
>>> Xint0x80_syscall() at Xint0x80_syscall+0x95/frame 0xfffffe124804fbf0
>>> --- syscall (1, FreeBSD ELF32, sys_sys_exit), rip = 0x281014df, rsp = 0xffffc45c, rbp = 0xffffc468 ---
>>
>>> #4 0xffffffff808c00db in lockdestroy (lk=0xfffff80a88a285f0) at /usr/src/sys/kern/kern_lock.c:440
>>> 440 KASSERT(lk->lk_lock == LK_UNLOCKED, ("lockmgr still held"));
>>> (kgdb) print *lk
>>> $1 = {lock_object = {lo_name = 0xffffffff8201a1bd "tmpfs", lo_flags = 116588552, lo_data = 0, lo_witness = 0xfffffe00006fec00}, lk_lock =
> 18446735288132049184, lk_exslpfail = 0,
>>> lk_timo = 51, lk_pri = 96}
>
> Can you please grab people.freebsd.org/~jhb/gdb/*
>
> and then do 'cd /path/to/files', 'source gdb6', 'frame 4', 'lockmgr_owner lk'?
>
(kgdb) lockmgr_owner lk
td: 0xfffff80272c61920
pid: 55040, p_comm: testprog
--
Regards,
Bryan Drewery
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