acquiring duplicate lock of same type: "ftlk"

[pluknet]

2009/12/11 Andriy Gapon <avg at icyb.net.ua>:
>
> acquiring duplicate lock of same type: "ftlk"
> 1st ftlk @ /usr/src/sys/compat/linux/linux_futex.c:177
> 2nd ftlk @ /usr/src/sys/compat/linux/linux_futex.c:203
> KDB: stack backtrace:
> db_trace_self_wrapper() at 0xffffffff801b1b9a = db_trace_self_wrapper+0x2a
> kdb_backtrace() at 0xffffffff80391542 = kdb_backtrace+0x32
> _witness_debugger() at 0xffffffff803a561c = _witness_debugger+0x2c
> witness_checkorder() at 0xffffffff803a6640 = witness_checkorder+0x510
> _sx_xlock() at 0xffffffff80367f78 = _sx_xlock+0x88
> futex_get0() at 0xffffffff8055ba27 = futex_get0+0x1e7
> linux_sys_futex() at 0xffffffff8055c74a = linux_sys_futex+0x58a
> ia32_syscall() at 0xffffffff8054a574 = ia32_syscall+0x2a4
> Xint0x80_syscall() at 0xffffffff80509425 = Xint0x80_syscall+0x95

Please, see this thread:
 http://lists.freebsd.org/pipermail/freebsd-emulation/2009-September/006786.html

-- 
wbr,
pluknet