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Subject: [Bug 214923] kqueue hangs with busy loop
Date: Fri, 16 Dec 2016 19:05:59 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D214923

--- Comment #10 from yjh0502@gmail.com ---
(In reply to Konstantin Belousov from comment #9)

I got a DDB shell, here's a backtrace.

db> bt
Tracing pid 764 tid 100622 td 0xfffff80007ccda00
kdb_enter() at kdb_enter+0x3b/frame 0xfffffe004f1757e0
vpanic() at vpanic+0x19f/frame 0xfffffe004f175860
panic() at panic+0x43/frame 0xfffffe004f1758c0
knote_drop() at knote_drop+0x28a/frame 0xfffffe004f175900
knote_fdclose() at knote_fdclose+0xd3/frame 0xfffffe004f175950
closefp() at closefp+0x65/frame 0xfffffe004f1759a0
amd64_syscall() at amd64_syscall+0x2f6/frame 0xfffffe004f175ab0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe004f175ab0
--- syscall (6, FreeBSD ELF64, sys_close), rip =3D 0x80104a7ca, rsp =3D
0x7fffdf9f9b58, rbp =3D 0x7fffdf9f9b70 ---
db>

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