Hi,
Some of my test machines hang while booting userland.
starting network
-> here it hangs
load: 0.02 cmd: ifconfig 81303 [sbar] 0.00u 0.15s 0% 78k
ddb shows these two processes.
81303 375320 89140 0 3 0x3 sbar ifconfig
48135 157353 0 0 3 0x14200 netlock systqmp
ddb{0}> trace /t 0t375320
sleep_finish(ffff800022d31318,1) at sleep_finish+0xfe
cond_wait(ffff800022d313b0,ffffffff81f15e9d) at cond_wait+0x54
sched_barrier(ffff800022512ff0) at sched_barrier+0x73
ixgbe_stop(ffff800000118000) at ixgbe_stop+0x1f7
ixgbe_init(ffff800000118000) at ixgbe_init+0x32
ixgbe_ioctl(ffff800000118048,8020690c,ffff80000022ec00) at ixgbe_ioctl+0x13a
in_ifinit(ffff800000118048,ffff80000022ec00,ffff800022d31740,1) at in_ifinit+0x
ef
in_ioctl_change_ifaddr(8040691a,ffff800022d31730,ffff800000118048,1) at in_ioct
l_change_ifaddr+0x3a4
in_control(fffffd81901dc740,8040691a,ffff800022d31730,ffff800000118048) at in_c
ontrol+0x75
ifioctl(fffffd81901dc740,8040691a,ffff800022d31730,ffff800022d60000) at ifioctl
+0x982
sys_ioctl(ffff800022d60000,ffff800022d31840,ffff800022d318a0) at sys_ioctl+0x2c
4
syscall(ffff800022d31910) at syscall+0x384
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd94a0, count: -13
ddb{0}> trace /t 0t157353
sleep_finish(ffff800022ca8b70,1) at sleep_finish+0xfe
rw_enter(ffffffff822b4f80,1) at rw_enter+0x1cb
pf_purge(0) at pf_purge+0x1d
taskq_thread(ffffffff822ac568) at taskq_thread+0x100
end trace frame: 0x0, count: -4
ifconfig waits for the sched_barrier_task() on the systqmp task
queue while holding the netlock. pf_purge() runs on the systqmp
task queue and is waiting for the netlock. The netlock has been
taken by ifconfig in in_ioctl_change_ifaddr().
The problem has been introduced when pf_purge() was moved from systq
to systqmp.
https://marc.info/?l=openbsd-cvs&m=166818274216800&w=2
bluhm
