Date: Fri, 4 Oct 2019 07:27:06 +1000 From: Peter Jeremy <peter@rulingia.com> To: freebsd-current@freebsd.org Subject: Reproduceable deadlock in NFS Client Message-ID: <20191003212706.GC5128@server.rulingia.com>
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My diskless Rock64 has taken to deadlocking reproduceably whilst
building libprivatesqlite3.a as part of buildworld when running
r352792. At the time of the deadlock, the relevant running process
is:
ar -crD libprivatesqlite3.a sqlite3.o
And those files are:
-rw-r--r-- 1 root wheel 3178496 4 Oct 01:10 libprivatesqlite3.a
-rw-r--r-- 1 root wheel 7975272 4 Oct 01:10 sqlite3.o
The "ar" reports it's in bo_wwait and, after about 30 minutes, I get:
deadlres_td_sleep_q: possible deadlock detected for 0xfffffd00012c9560, blo=
cked for 1800613 ticks
cpuid =3D 2
time =3D 1570117920
KDB: stack backtrace:
db_trace_self() at db_trace_self_wrapper+0x28
pc =3D 0xffff00000054b83c lr =3D 0xffff0000000e2b08
sp =3D 0xffff00004030a790 fp =3D 0xffff00004030a9a0
db_trace_self_wrapper() at vpanic+0x18c
pc =3D 0xffff0000000e2b08 lr =3D 0xffff00000027fb54
sp =3D 0xffff00004030a9b0 fp =3D 0xffff00004030aa50
vpanic() at panic+0x44
pc =3D 0xffff00000027fb54 lr =3D 0xffff00000027f904
sp =3D 0xffff00004030aa60 fp =3D 0xffff00004030aae0
panic() at deadlkres+0x33c
pc =3D 0xffff00000027f904 lr =3D 0xffff00000021c19c
sp =3D 0xffff00004030aaf0 fp =3D 0xffff00004030ab50
deadlkres() at fork_exit+0x7c
pc =3D 0xffff00000021c19c lr =3D 0xffff0000002404f4
sp =3D 0xffff00004030ab60 fp =3D 0xffff00004030ab90
fork_exit() at fork_trampoline+0x10
pc =3D 0xffff0000002404f4 lr =3D 0xffff00000056743c
sp =3D 0xffff00004030aba0 fp =3D 0x0000000000000000
--=20
Peter Jeremy
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