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QEMU hangs with smp option on ubuntu 16.04 ... any fix? (2/2)

From Jun Sun@21:1/5 to jsun@junsun.net on Sun Oct 7 23:10:02 2018

[continued from previous message]

<div dir="ltr"><div dir="ltr">So I tried to rebuild kernel with debian kernel source and debian kernel config, except that I added CONFIG_MIPS_MT_SMP, which in turn turns on CONFIG_SMP.<div><br></div><div>This new kernel boots all the way to user land
and I could see CPU1 is brought up. However, it crashes early after it enters userland. It gives some cryptic error messages. See some of them below.</div><div><br></div><div>Did I do anything wrongly? Would appreciate any pointers.</div><div><br>
</div><div>Jun</div><div><br></div><div>==================</div><div><div>ubuntu@ip-10-1-3-178:~/mipseb$ ./start-mipseb.sh </div><div>[ 0.000000] Linux version 4.9.0-7-4kc-malta-rt76 (ubuntu@ip-10-1-3-178) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-
6ubuntu1~16.04.9) ) #9 SMP Sun Oct 7 15:54:10 UTC 2018</div><div>[ 0.000000] earlycon: uart8250 at I/O port 0x3f8 (options '38400n8')</div><div>[ 0.000000] bootconsole [uart8250] enabled</div><div>[ 0.000000] MIPS CPS SMP unable to
proceed without a CM</div><div>[ 0.000000] CPU0 revision is: 00019500 (MIPS 34Kc)</div><div>[ 0.000000] FPU revision is: 00739500</div><div>[ 0.000000] MIPS: machine is mti,malta</div><div>[ 0.000000] Software DMA cache coherency
enabled</div><div>[ 0.000000] Determined physical RAM map:</div><div>[ 0.000000] memory: 10000000 @ 00000000 (usable)</div><div>[ 0.000000] memory: 21fff000 @ 90000000 (usable)</div><div>[ 0.000000] Initial ramdisk at: 0x80af0000 (
19033219 bytes)</div><div>[ 0.000000] Reserving 0MB of memory at 0MB for crashkernel</div><div>[ 0.000000] Detected 1 available secondary CPU(s)</div><div>[ 0.000000] Primary instruction cache 2kB, VIPT, 2-way, linesize 16 bytes.</div><div>
[ 0.000000] Primary data cache 2kB, 2-way, VIPT, no aliases, linesize 16 bytes</div><div>[ 0.000000] Zone ranges:</div><div>[ 0.000000] DMA [mem 0x0000000000000000-0x0000000000ffffff]</div><div>[ 0.000000] Normal [
mem 0x0000000001000000-0x000000000fffffff]</div><div>[ 0.000000] Movable zone start for each node</div><div>[ 0.000000] Early memory node ranges</div><div>[ 0.000000] node 0: [mem 0x0000000000000000-0x000000000fffffff]</div><div>[
0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000000fffffff]</div><div>[ 0.000000] percpu: Embedded 15 pages/cpu @81f5d000 s32208 r8192 d21040 u61440</div><div>[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on.�
� Total pages: 64960</div><div>[ 0.000000] Kernel command line: rd_start=0xffffffff80af0000 rd_size=19033219 root=/dev/sda1 console=ttyS0 nokaslr</div><div>[ 0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)</div><div>[ 0.
000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)</div><div>[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)</div><div>[ 0.000000] Writing ErrCtl register=00000000</div><div>[ 0.000000]
Readback ErrCtl register=00000000</div><div>[ 0.000000] Memory: 229708K/262144K available (6445K kernel code, 574K rwdata, 1348K rodata, 1480K init, 302K bss, 32436K reserved, 0K cma-reserved)</div><div>[ 0.000000] Hierarchical RCU
implementation.</div><div>[ 0.000000] <span style="white-space:pre"> </span>Build-time adjustment of leaf fanout to 32.</div><div>[ 0.000000] NR_IRQS:256</div><div>[ 0.000000] CPU frequency 200.00 MHz</div><div>[ 0.000000] clocksource:
MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112674795 ns</div><div>[ 0.000174] sched_clock: 32 bits at 99MHz, resolution 10ns, wraps every 21474915322ns</div><div>[ 0.009984] Console: colour dummy device 80x25</div><div>[
0.011080] Calibrating delay loop... 1142.78 BogoMIPS (lpj=2285568)</div><div>[ 0.034914] pid_max: default: 32768 minimum: 301</div><div>[ 0.036331] Security Framework initialized</div><div>[ 0.036630] Yama: disabled by default; enable
with sysctl kernel.yama.*</div><div>[ 0.037709] AppArmor: AppArmor disabled by boot time parameter</div><div>[ 0.039095] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)</div><div>[ 0.039549] Mountpoint-cache hash table entries:
1024 (order: 0, 4096 bytes)</div><div>[ 0.051724] ftrace: allocating 19328 entries in 38 pages</div><div>[ 0.119358] Performance counters: No available PMU.</div><div>[ 0.139167] Primary instruction cache 2kB, VIPT, 2-way, linesize 16
bytes.</div><div>[ 0.139240] Primary data cache 2kB, 2-way, VIPT, no aliases, linesize 16 bytes</div><div>[ 0.142776] CPU1 revision is: 00019500 (MIPS 34Kc)</div><div>[ 0.142795] FPU revision is: 00739500</div><div>[ 3.388816]
Synchronize counters for CPU 1: </div><div>[ 3.388834] done.</div><div>[ 3.391435] Brought up 2 CPUs</div><div>[ 3.441632] devtmpfs: initialized</div><div>[ 3.484928] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_
idle_ns: 7645041785100000 ns</div><div>[ 3.485834] futex hash table entries: 512 (order: 3, 32768 bytes)</div><div>[ 3.539332] NET: Registered protocol family 16</div><div>[ 3.557040] pm-cps: no CM, non-coherent states unavailable</div><

[ 4.943802] vgaarb: loaded</div><div>[ 4.945261] SCSI subsystem initialized</div><div>[ 4.947839] PCI host bridge to bus 0000:00</div><div>[ 4.948526] pci_bus 0000:00: root bus resource [mem 0x10000000-0x17ffffff]</div><div>[

4.948991] pci_bus 0000:00: root bus resource [io 0x1000-0x1fffff]</div><div>[ 4.949558] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]</div><div>[ 4.950012] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-
ff]</div><div>[ 4.951733] pci 0000:00:00.0: [Firmware Bug]: reg 0x14: invalid BAR (can't size)</div><div>[ 4.952198] pci 0000:00:00.0: [Firmware Bug]: reg 0x18: invalid BAR (can't size)</div><div>[ 4.952636] pci 0000:00:00.0: [
Firmware Bug]: reg 0x1c: invalid BAR (can't size)</div><div>[ 4.953074] pci 0000:00:00.0: [Firmware Bug]: reg 0x20: invalid BAR (can't size)</div><div>[ 4.953530] pci 0000:00:00.0: [Firmware Bug]: reg 0x24: invalid BAR (can't size)</

<div>[ 4.956039] pci 0000:00:0a.1: legacy IDE quirk: reg 0x10: [io 0x01f0-0x01f7]</div><div>[ 4.956495] pci 0000:00:0a.1: legacy IDE quirk: reg 0x14: [io 0x03f6]</div><div>[ 4.956903] pci 0000:00:0a.1: legacy IDE quirk: reg 0x18: [

io 0x0170-0x0177]</div><div>[ 4.957337] pci 0000:00:0a.1: legacy IDE quirk: reg 0x1c: [io 0x0376]</div><div>[ 4.959035] pci 0000:00:0a.3: quirk: [io 0x1000-0x103f] claimed by PIIX4 ACPI</div><div>[ 4.959507] pci 0000:00:0a.3: quirk: [
io 0x1100-0x110f] claimed by PIIX4 SMB</div><div>[ 4.961180] vgaarb: device added: PCI:0000:00:12.0,decodes=io+mem,owns=none,locks=none</div><div>[ 4.962671] pci 0000:00:12.0: BAR 0: assigned [mem 0x10000000-0x11ffffff pref]</div><div>[
4.963235] pci 0000:00:0b.0: BAR 6: assigned [mem 0x12000000-0x1203ffff pref]</div><div>[ 4.963693] pci 0000:00:12.0: BAR 6: assigned [mem 0x12040000-0x1204ffff pref]</div><div>[ 4.964147] pci 0000:00:12.0: BAR 1: assigned [mem 0x12050000-
0x12050fff]</div><div>[ 4.964587] pci 0000:00:0a.2: BAR 4: assigned [io 0x1040-0x105f]</div><div>[ 4.964964] pci 0000:00:0b.0: BAR 0: assigned [io 0x1060-0x107f]</div><div>[ 4.965335] pci 0000:00:0b.0: BAR 1: assigned [mem 0x12051000-
0x1205101f]</div><div>[ 4.965743] pci 0000:00:0a.1: BAR 4: assigned [io 0x1080-0x108f]</div><div>[ 16.002004] clocksource: Switched to clocksource MIPS</div><div>[ 17.511363] VFS: Disk quotas dquot_6.6.0</div><div>[ 18.010327] VFS:
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)</div><div>[ 18.020783] random: fast init done</div><div>[ 20.044699] NET: Registered protocol family 2</div><div>[ 21.544726] TCP established hash table entries: 2048 (order: 1, 8192
bytes)</div><div>[ 21.545391] TCP bind hash table entries: 2048 (order: 2, 16384 bytes)</div><div>[ 21.545894] TCP: Hash tables configured (established 2048 bind 2048)</div><div>[ 21.546944] UDP hash table entries: 256 (order: 1, 8192 bytes)</

<div>[ 21.547382] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)</div><div>[ 22.043069] NET: Registered protocol family 1</div><div>[ 22.044032] PCI: Enabling device 0000:00:0a.2 (0000 -> 0001)</div><div>[ 22.049627]

Unpacking initramfs...</div><div>[ 23.318000] Freeing initrd memory: 18584K</div><div>[ 24.820672] audit: initializing netlink subsys (disabled)</div><div>[ 24.821840] audit: type=2000 audit(1538945938.020:1): initialized</div><div>[ 24.
826730] workingset: timestamp_bits=14 max_order=16 bucket_order=2</div><div>[ 24.828367] zbud: loaded</div><div>[ 26.426847] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)</div><div>[ 26.428457] io scheduler noop
registered</div><div>[ 26.428881] io scheduler deadline registered</div><div>[ 27.425910] io scheduler cfq registered (default)</div><div>[ 27.427252] PCI: Enabling device 0000:00:12.0 (0000 -> 0002)</div><div>[ 27.429071] cirrusfb
0000:00:12.0: Cirrus Logic chipset on PCI bus, RAM (4096 kB) at 0x10000000</div><div>[ 27.666740] Console: switching to colour frame buffer device 80x30</div><div>[ 27.688486] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled</div><div>[ �
�27.695375] console [ttyS0] disabled</div><div>[ 27.720304] serial8250.0: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A</div><div>[ 27.721708] console [ttyS0] enabled</div><div>[ 27.721708] console [ttyS0] enabled</div><div>[
27.722687] bootconsole [uart8250] disabled</div><div>[ 27.722687] bootconsole [uart8250] disabled</div><div>[ 27.747064] serial8250.0: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A</div><div>[ 27.751639] mousedev: PS/2 mouse
device common for all mice</div><div>[ 27.754282] rtc_cmos 70.rtc: rtc core: registered rtc_cmos as rtc0</div><div>[ 27.755165] rtc_cmos 70.rtc: alarms up to one day, 242 bytes nvram</div><div>[ 27.756946] ledtrig-cpu: registered to indicate
activity on CPUs</div><div>[ 29.497742] NET: Registered protocol family 10</div><div>[ 30.497515] mip6: Mobile IPv6</div><div>[ 30.497841] NET: Registered protocol family 17</div><div>[ 30.498219] mpls_gso: MPLS GSO support</div><div>[ �
�30.500361] registered taskstats version 1</div><div>[ 30.501270] zswap: loaded using pool lzo/zbud</div><div>[ 30.503611] ima: No TPM chip found, activating TPM-bypass!</div><div>[ 30.504203] ima: Allocated hash algorithm: sha256</div><div>[�
� 30.996619] rtc_cmos 70.rtc: setting system clock to 2018-10-07 20:59:23 UTC (1538945963)</div><div>[ 31.022045] Freeing unused kernel memory: 1480K</div><div>[ 31.022366] This architecture does not have kernel memory protection.</div><div>
Loading, please wait...</div><div>[ 3.889843] INFO: rcu_sched self-detected stall on CPU</div><div>[ 3.890535] <span style="white-space:pre"> </span>0-...: (2 ticks this GP) idle=385/2/0 softirq=0/0 fqs=0 </div><div>[ 3.891233] <span
style="white-space:pre"> </span> (t=5353 jiffies g=-299 c=-300 q=2017)</div><div>[ 3.891755] rcu_sched kthread starved for 5353 jiffies! g4294966997 c4294966996 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x1</div><div>[ 3.892941] rcu_sched S
0 7 2 0x00100000</div><div>[ 3.893553] Stack : 81f642c0 8fca8280 8fcfc900 8fcfd1c0 8fcfc900 807562b4 80741f44 81f642c0</div><div>[ 3.894325] 81f642f8 8099d2c0 808b1220 808b0000 81f642f8 00040900 8fcfc900 8fcffdf4<
/div><div>[ 3.895234] 81f5f680 808b0000 81f5f680 808b0000 00000000 ffffffff 00000000 80741f44</div><div>[ 3.895989] 8fcffdf4 809a0000 808b0000 fffee4ed fffee4ed 807454f8 8fcffe98 808b0000</div><div>[ 3.896724]
808c2650 801921c4 00000001 81f5f680 00000001 00000000 81f5f930 fffee4ed</div><div>[ 3.897360] ...</div><div>[ 3.897850] Call Trace:</div><div>[ 3.898314] [<80741a78>] __schedule+0x62c/0xaa8</div><div>[ 3.
898835] [<80741f44>] schedule+0x50/0xf0</div><div>[ 3.899135] [<807454f8>] schedule_timeout+0x1ec/0x484</div><div>[ 3.899493] [<801c1580>] rcu_gp_kthread+0x5bc/0xa90</div><div>[ 3.899840] [<80161a74>] kthread+0xfc/
0x114</div><div>[ 3.900139] [<80106a58>] ret_from_kernel_thread+0x14/0x1c</div><div>[ 3.900774] Task dump for CPU 0:</div><div>[ 3.901018] swapper/0 R running task 0 0 0 0x00100004</div><div>[ �
� 3.901530] Stack : 80aa9410 00000000 80ab0000 801ac6b8 00000000 00000000 80ab0000 801ac6b8</div><div>[ 3.902139] 0000001d 00000006 00000006 00000000 00000000 00000000 0000000a 00000000</div><div>[ 3.902790] 00000000
80aa9412 0000001d 80aa9878 808b0000 808c24c0 808b0000 808b0808</div><div>[ 3.903508] 00000140 808b0000 00000000 00000000 00000000 00000000 00000000 00000000</div><div>[ 3.904194] 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000</div><div>[ 3.904857] ...</div><div>[ 3.905052] Call Trace:</div><div>[ 3.905251] [<8010d8d0>] show_stack+0xa0/0xc4</div><div>[ 3.905595] [<8027c2e4>] rcu_dump_cpu_stacks+
0xe8/0x128</div><div>[ 3.905971] [<801c274c>] rcu_check_callbacks+0x854/0xa20</div><div>[ 3.906344] [<801ca378>] update_process_times+0x4c/0x80</div><div>[ 3.906946] [<801e1928>] tick_sched_handle.isra.4+0x34/0x94</div><

[ 3.907390] [<801e19f8>] tick_sched_timer+0x70/0xdc</div><div>[ 3.907782] [<801cb9b4>] __hrtimer_run_queues+0x144/0x3d8</div><div>[ 3.908173] [<801cc6cc>] hrtimer_interrupt+0x118/0x338</div><div>[ 3.908543] [<

80112580>] c0_compare_interrupt+0x8c/0xe4</div><div>[ 3.908920] [<801aee0c>] __handle_irq_event_percpu+0x8c/0x2a0</div><div>[ 3.909330] [<801af078>] handle_irq_event_percpu+0x58/0xbc</div><div>[ 3.909723] [<801b4820>]
handle_percpu_irq+0x98/0xc8</div><div>[ 3.910083] [<801ae100>] generic_handle_irq+0x50/0x6c</div><div>[ 3.910459] [<80747e48>] do_IRQ+0x28/0x34</div><div>[ 3.910771] [<804a3800>] plat_irq_dispatch+0x64/0xb8</div><div>[ �
� 3.911133] [<80106f68>] except_vec_vi_end+0xb8/0xc4</div><div>[ 3.911531] Task dump for CPU 1:</div><div>[ 3.911761] init R running task 0 68 1 0x08100020</div><div>[ 3.912254] Stack :
808e0000 8082745c 8ca86300 80367030 00002017 802b8e60 80aa0000 802f79a4</div><div>[ 3.912898] 8fd51022 00000000 8ca86302 2f62696e 2f736800 00000000 00000010 8cb05e80</div><div>[ 3.913537] 808b0000 00000000 00000000
00040900 00000e51 00000000 7ffffe51 564ac4ac</div><div>[ 3.914176] 8ca86300 00000000 8cad8180 00040900 8cb02600 808b0000 00000044 00000044</div><div>[ 3.914904] 564ac4e4 8fd51000 8ca86300 00000000 8ca86300 80400a7c
564ac4ac 803005a0</div><div>[ 3.915595] ...</div><div>[ 3.915786] Call Trace:</div><div>[ 3.915980] [<80741a78>] __schedule+0x62c/0xaa8</div><div>starting version 232</div><div>[ 46.611678] random: systemd-udevd:
uninitialized urandom read (16 bytes read)</div><div>[ 46.618684] random: systemd-udevd: uninitialized urandom read (16 bytes read)</div><div>[ 46.701579] random: udevadm: uninitialized urandom read (16 bytes read)</div><div>Begin: Loading
essential drivers ... done.</div><div>Begin: Running /scripts/init-premount ... done.</div><div>Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.</div><div>Begin: Running /scripts/local-premount ... Begin: Waiting for
suspend/resume device ... [ 9.552903] INFO: rcu_sched self-detected stall on CPU</div><div>[ 9.553683] <span style="white-space:pre"> </span>1-...: (3 ticks this GP) idle=391/140000000000001/0 softirq=0/0 fqs=0 </div><div>[ 9.554157] <
span style="white-space:pre"> </span> (t=10615 jiffies g=-290 c=-291 q=2422)</div><div>[ 9.554600] rcu_sched kthread starved for 10615 jiffies! g4294967006 c4294967005 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x1</div><div>[ 9.561916] rcu_sched �
� S 0 7 2 0x00100000</div><div>[ 9.562364] Stack : 81f642c0 8fca8280 8fcfc900 8fcfd1c0 8fcfc900 8fcffdf4 808b0000 8fcffdf4</div><div>[ 9.563023] 808b0000 8ca24400 81f6e680 808b0000 8fcffdf4 801c6ef8 8fcfc900
8fcffdf4</div><div>[ 9.563344] 81f6e680 808b0000 81f6e680 808b0000 00000000 ffffffff 00000001 80741f44</div><div>[ 9.563627] 8fcffdf4 809a0000 808b0000 fffeffd9 fffeffd9 807454f8 8fcffe98 808b0000</div><div>[ 9.
563956] 808c2650 801921c4 00000001 81f6e680 00000001 00000000 81f6e748 fffeffd9</div><div>[ 9.564258] ...</div><div>[ 9.564426] Call Trace:</div><div>[ 9.564997] [<80741a78>] __schedule+0x62c/0xaa8</div><div>
[ 9.565428] [<80741f44>] schedule+0x50/0xf0</div><div>[ 9.565558] [<807454f8>] schedule_timeout+0x1ec/0x484</div><div>[ 9.565741] [<801c1580>] rcu_gp_kthread+0x5bc/0xa90</div><div>[ 9.565900] [<80161a74>]
kthread+0xfc/0x114</div><div>[ 9.566035] [<80106a58>] ret_from_kernel_thread+0x14/0x1c</div><div>[ 9.566478] Task dump for CPU 0:</div><div>[ 9.566603] swapper/0 R running task 0 0 0 0x00100000</

<div>[ 9.566828] Stack : 00000008 801e1874 808c21e4 81f5f618 808c2734 00000000 00000000 00000000</div><div>[ 9.567327] 00000002 ffffffe3 81f5d200 00000000 00000008 081b3200 00000008 c71dc863</div><div>[ 9.567862]

7fffffff ffffffff 80812ae8 00040900 808b0804 00000001 808b0000 80920000</div><div>[ 9.568331] 80812ae8 80920000 00000001 00000000 00000000 801e1c58 808b0804 00000001</div><div>[ 9.568751] 808b0000 80920000 808b0804
80192c4c 808b0000 80742390 00000000 00000000</div><div>[ 9.569239] ...</div><div>[ 9.569351] Call Trace:</div><div>[ 9.569509] [<80741a78>] __schedule+0x62c/0xaa8</div><div>[ 9.569758] Task dump for CPU 1:</div><div>
[ 9.575233] cat R running task 0 93 88 0x08110004</div><div>[ 9.575695] Stack : 80aa9410 00000000 80ab0000 801ac6b8 00000000 00000000 80ab0000 801ac6b8</div><div>[ 9.576222] 0000001d
00000006 00000006 8fcfc900 00000000 00000000 0000000a 00000000</div><div>[ 9.576822] 00000000 80aa9412 0000001d 80aa9878 808b0000 808c24c0 808b0000 808b0808</div><div>[ 9.577385] 00000140 808b0000 00000000 00000000
00000000 00000000 00000000 00000000</div><div>[ 9.577911] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000</div><div>[ 9.578434] ...</div><div>[ 9.578574] Call Trace:</div><div>[ 9.
578734] [<8010d8d0>] show_stack+0xa0/0xc4</div><div>[ 9.579025] [<8027c2e4>] rcu_dump_cpu_stacks+0xe8/0x128</div><div>[ 9.579491] [<801c274c>] rcu_check_callbacks+0x854/0xa20</div><div>[ 9.579936] [<801ca378>]
update_process_times+0x4c/0x80</div><div>[ 9.580254] [<801e1928>] tick_sched_handle.isra.4+0x34/0x94</div><div>[ 9.580587] [<801e19f8>] tick_sched_timer+0x70/0xdc</div><div>[ 9.580944] [<801cb9b4>] __hrtimer_run_queues+
0x144/0x3d8</div><div>[ 9.581275] [<801cc6cc>] hrtimer_interrupt+0x118/0x338</div><div>[ 9.581582] [<80112580>] c0_compare_interrupt+0x8c/0xe4</div><div>[ 9.582524] [<801aee0c>] __handle_irq_event_percpu+0x8c/0x2a0</div><

[ 9.582939] [<801af078>] handle_irq_event_percpu+0x58/0xbc</div><div>[ 9.583705] [<801b4820>] handle_percpu_irq+0x98/0xc8</div><div>[ 9.584026] [<801ae100>] generic_handle_irq+0x50/0x6c</div><div>[ 9.584392] [<

80747e48>] do_IRQ+0x28/0x34</div><div>[ 9.585228] [<804a3800>] plat_irq_dispatch+0x64/0xb8</div><div>[ 9.585544] [<80106f68>] except_vec_vi_end+0xb8/0xc4</div><div>[ 9.586059] [<80306d7c>] path_init+0xe4/0x3b8</div><

[ 9.587379] [<8030ac24>] path_openat+0x94/0x111c</div><div>[ 9.587725] [<8030d114>] do_filp_open+0xf4/0x138</div><div>[ 9.588053] [<802f6fc8>] do_sys_open+0x1c0/0x27c</div><div>[ 9.589432] [<80117f98>]

syscall_common+0x34/0x58</div><div>[ 52.550795] INFO: rcu_sched self-detected stall on CPU</div><div>[ 52.552049] <span style="white-space:pre"> </span>1-...: (7 ticks this GP) idle=391/140000000000002/0 softirq=0/0 fqs=0 </div><div>[ 52.
552508] <span style="white-space:pre"> </span> (t=32101 jiffies g=-290 c=-291 q=2422)</div><div>[ 10.105092] rcu_sched kthread starved for 32101 jiffies! g4294967006 c4294967005 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0</div><div>[ 12.124160] INFO:
rcu_sched detected stalls on CPUs/tasks:</div><div>[ 13.123363] <span style="white-space:pre"> </span>1-...: (7 ticks this GP) idle=391/140000000000002/0 softirq=0/0 fqs=0 </div><div>[ 15.121749] <span style="white-space:pre"> </span>(detected
by 0, t=32101 jiffies, g=-290, c=-291, q=2422)</div><div>[ 16.120913] Task dump for CPU 1:</div><div>[ 17.130901] cat R running task [ 19.129399] rcu_sched R</div><div>[ 20.128479] running task
0 7 2 0x00100000</div><div>Stack :</div><div>[ 23.126117] 81f642c0 8fca8280 8fcfc900 8fcfd1c0 8fcfc900 8fcffdf4 808b0000 8fcffdf4qemu-system-mips: terminating on signal 15 from pid 3927</div><div>ubuntu@ip-10-1-3-178:~/mipseb$
</div></div><div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr">On Sat, Oct 6, 2018 at 10:18 AM Jun Sun <<a href="mailto:jsun@junsun.net">jsun@junsun.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .
8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr">After I added "-cpu 34Kf", qemu would start normally again even with "-smp 2" option.</div><div dir="ltr"><br></div><div>However, "cat /
proc/cpuinfo" only shows 1 CPU. "uname -a" shows the following which seems to suggest the kernel is not SMP aware. Is there a kernel for malta with SMP support?</div><div><br></div><div><div><font face="monospace, monospace">Linux
debian-mips 4.9.0-7-4kc-malta #1 Debian 4.9.110-3+deb9u2 (2018-08-13) mips GNU/Linux</font></div></div><div><br></div><div>Thanks.</div><div><br></div><div>Jun</div></div></div><br><div class="gmail_quote"><div dir="ltr">On Sat, Oct 6, 2018 at 8:47 AM
Jun Sun <<a href="mailto:jsun@junsun.net" target="_blank">jsun@junsun.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr">Hi,
all,<div><br></div><div>I've been loosely following the instruct at this page, <a href="https://github.com/kholia/mips-hacking" target="_blank">https://github.com/kholia/mips-hacking</a></div><div><br></div><div>My host is ubuntu 16.04. I used
ubuntu prebuilt qemu system images.</div><div><br></div><div>My guest is the latest stretch 9.5 malta netboot images. Kernel is vmlinux-4.9.0-7-4kc-malta.</div><div><br></div><div>Below is my startup script. If I change "smp" to 2, the
startup will hang very early on. Does anybody if this is a known limit with debian distro? Or it is an issue with the ubuntu prebuilt qemu? Or there are some other gotcha's here?</div><div><br></div><div><div><font face="monospace, monospace">
qemu-system-mips \</font></div><div><font face="monospace, monospace"><span style="white-space:pre-wrap"> </span>-M malta \</font></div><div><font face="monospace, monospace"><span style="white-space:pre-wrap"> </span>-m 256 \</font></div><div><font face=
"monospace, monospace"><span style="white-space:pre-wrap"> </span>-hda hda.qcow2 \</font></div><div><font face="monospace, monospace"><span style="white-space:pre-wrap"> </span>-kernel vmlinux-4.9.0-7-4kc-malta \</font></div><div><font face="monospace,
monospace"><span style="white-space:pre-wrap"> </span>-initrd initrd.img-4.9.0-7-4kc-malta \</font></div><div><font face="monospace, monospace"> <span style="white-space:pre-wrap"> </span>-append "root=/dev/sda1 console=ttyS0 nokaslr" \</
font></div><div><font face="monospace, monospace"><span style="white-space:pre-wrap"> </span>-nographic \</font></div><div><font face="monospace, monospace"><span style="white-space:pre-wrap"> </span>-redir tcp:2222::22 \</font></div><div><font face="
monospace, monospace"><span style="white-space:pre-wrap"> </span>-smp 1 \</font></div><div><font face="monospace, monospace"><span style="white-space:pre-wrap"> </span>\</font></div></div><div><br></div><div>Cheers.</div><div><br></div><div>Jun</div><div>
<br></div><div><br></div><div><br></div></div></div></div>
</blockquote></div>
</blockquote></div>

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

From Jun Sun@21:1/5 to wzssyqa@gmail.com on Sat Oct 27 21:00:01 2018

[continued from previous message]

> [ 27.754282] rtc_cmos 70.rtc: rtc core: registered rtc_cmos as rtc0<br>
> [ 27.755165] rtc_cmos 70.rtc: alarms up to one day, 242 bytes nvram<br>
> [ 27.756946] ledtrig-cpu: registered to indicate activity on CPUs<br> > [ 29.497742] NET: Registered protocol family 10<br>
> [ 30.497515] mip6: Mobile IPv6<br>
> [ 30.497841] NET: Registered protocol family 17<br>
> [ 30.498219] mpls_gso: MPLS GSO support<br>
> [ 30.500361] registered taskstats version 1<br>
> [ 30.501270] zswap: loaded using pool lzo/zbud<br>
> [ 30.503611] ima: No TPM chip found, activating TPM-bypass!<br>
> [ 30.504203] ima: Allocated hash algorithm: sha256<br>
> [ 30.996619] rtc_cmos 70.rtc: setting system clock to 2018-10-07 20:59:23 UTC (1538945963)<br>
> [ 31.022045] Freeing unused kernel memory: 1480K<br>
> [ 31.022366] This architecture does not have kernel memory protection.<br>
> Loading, please wait...<br>
> [ 3.889843] INFO: rcu_sched self-detected stall on CPU<br>
> [ 3.890535] 0-...: (2 ticks this GP) idle=385/2/0 softirq=0/0 fqs=0<br>
> [ 3.891233] (t=5353 jiffies g=-299 c=-300 q=2017)<br>
> [ 3.891755] rcu_sched kthread starved for 5353 jiffies! g4294966997 c4294966996 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x1<br>
> [ 3.892941] rcu_sched S 0 7 2 0x00100000<br>
> [ 3.893553] Stack : 81f642c0 8fca8280 8fcfc900 8fcfd1c0 8fcfc900 807562b4 80741f44 81f642c0<br>
> [ 3.894325] 81f642f8 8099d2c0 808b1220 808b0000 81f642f8 00040900 8fcfc900 8fcffdf4<br>
> [ 3.895234] 81f5f680 808b0000 81f5f680 808b0000 00000000 ffffffff 00000000 80741f44<br>
> [ 3.895989] 8fcffdf4 809a0000 808b0000 fffee4ed fffee4ed 807454f8 8fcffe98 808b0000<br>
> [ 3.896724] 808c2650 801921c4 00000001 81f5f680 00000001 00000000 81f5f930 fffee4ed<br>
> [ 3.897360] ...<br>
> [ 3.897850] Call Trace:<br>
> [ 3.898314] [<80741a78>] __schedule+0x62c/0xaa8<br>
> [ 3.898835] [<80741f44>] schedule+0x50/0xf0<br>
> [ 3.899135] [<807454f8>] schedule_timeout+0x1ec/0x484<br>
> [ 3.899493] [<801c1580>] rcu_gp_kthread+0x5bc/0xa90<br>
> [ 3.899840] [<80161a74>] kthread+0xfc/0x114<br>
> [ 3.900139] [<80106a58>] ret_from_kernel_thread+0x14/0x1c<br> > [ 3.900774] Task dump for CPU 0:<br>
> [ 3.901018] swapper/0 R running task 0 0 0 0x00100004<br>
> [ 3.901530] Stack : 80aa9410 00000000 80ab0000 801ac6b8 00000000 00000000 80ab0000 801ac6b8<br>
> [ 3.902139] 0000001d 00000006 00000006 00000000 00000000 00000000 0000000a 00000000<br>
> [ 3.902790] 00000000 80aa9412 0000001d 80aa9878 808b0000 808c24c0 808b0000 808b0808<br>
> [ 3.903508] 00000140 808b0000 00000000 00000000 00000000 00000000 00000000 00000000<br>
> [ 3.904194] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000<br>
> [ 3.904857] ...<br>
> [ 3.905052] Call Trace:<br>
> [ 3.905251] [<8010d8d0>] show_stack+0xa0/0xc4<br>
> [ 3.905595] [<8027c2e4>] rcu_dump_cpu_stacks+0xe8/0x128<br> > [ 3.905971] [<801c274c>] rcu_check_callbacks+0x854/0xa20<br> > [ 3.906344] [<801ca378>] update_process_times+0x4c/0x80<br> > [ 3.906946] [<801e1928>] tick_sched_handle.isra.4+0x34/0x94<br> > [ 3.907390] [<801e19f8>] tick_sched_timer+0x70/0xdc<br>
> [ 3.907782] [<801cb9b4>] __hrtimer_run_queues+0x144/0x3d8<br> > [ 3.908173] [<801cc6cc>] hrtimer_interrupt+0x118/0x338<br>
> [ 3.908543] [<80112580>] c0_compare_interrupt+0x8c/0xe4<br> > [ 3.908920] [<801aee0c>] __handle_irq_event_percpu+0x8c/0x2a0<br>
> [ 3.909330] [<801af078>] handle_irq_event_percpu+0x58/0xbc<br> > [ 3.909723] [<801b4820>] handle_percpu_irq+0x98/0xc8<br>
> [ 3.910083] [<801ae100>] generic_handle_irq+0x50/0x6c<br>
> [ 3.910459] [<80747e48>] do_IRQ+0x28/0x34<br>
> [ 3.910771] [<804a3800>] plat_irq_dispatch+0x64/0xb8<br>
> [ 3.911133] [<80106f68>] except_vec_vi_end+0xb8/0xc4<br>
> [ 3.911531] Task dump for CPU 1:<br>
> [ 3.911761] init R running task 0 68 1 0x08100020<br>
> [ 3.912254] Stack : 808e0000 8082745c 8ca86300 80367030 00002017 802b8e60 80aa0000 802f79a4<br>
> [ 3.912898] 8fd51022 00000000 8ca86302 2f62696e 2f736800 00000000 00000010 8cb05e80<br>
> [ 3.913537] 808b0000 00000000 00000000 00040900 00000e51 00000000 7ffffe51 564ac4ac<br>
> [ 3.914176] 8ca86300 00000000 8cad8180 00040900 8cb02600 808b0000 00000044 00000044<br>
> [ 3.914904] 564ac4e4 8fd51000 8ca86300 00000000 8ca86300 80400a7c 564ac4ac 803005a0<br>
> [ 3.915595] ...<br>
> [ 3.915786] Call Trace:<br>
> [ 3.915980] [<80741a78>] __schedule+0x62c/0xaa8<br>
> starting version 232<br>
> [ 46.611678] random: systemd-udevd: uninitialized urandom read (16 bytes read)<br>
> [ 46.618684] random: systemd-udevd: uninitialized urandom read (16 bytes read)<br>
> [ 46.701579] random: udevadm: uninitialized urandom read (16 bytes read)<br>
> Begin: Loading essential drivers ... done.<br>
> Begin: Running /scripts/init-premount ... done.<br>
> Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.<br>
> Begin: Running /scripts/local-premount ... Begin: Waiting for suspend/resume device ... [ 9.552903] INFO: rcu_sched self-detected stall on CPU<br>
> [ 9.553683] 1-...: (3 ticks this GP) idle=391/140000000000001/0 softirq=0/0 fqs=0<br>
> [ 9.554157] (t=10615 jiffies g=-290 c=-291 q=2422)<br>
> [ 9.554600] rcu_sched kthread starved for 10615 jiffies! g4294967006 c4294967005 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x1<br>
> [ 9.561916] rcu_sched S 0 7 2 0x00100000<br>
> [ 9.562364] Stack : 81f642c0 8fca8280 8fcfc900 8fcfd1c0 8fcfc900 8fcffdf4 808b0000 8fcffdf4<br>
> [ 9.563023] 808b0000 8ca24400 81f6e680 808b0000 8fcffdf4 801c6ef8 8fcfc900 8fcffdf4<br>
> [ 9.563344] 81f6e680 808b0000 81f6e680 808b0000 00000000 ffffffff 00000001 80741f44<br>
> [ 9.563627] 8fcffdf4 809a0000 808b0000 fffeffd9 fffeffd9 807454f8 8fcffe98 808b0000<br>
> [ 9.563956] 808c2650 801921c4 00000001 81f6e680 00000001 00000000 81f6e748 fffeffd9<br>
> [ 9.564258] ...<br>
> [ 9.564426] Call Trace:<br>
> [ 9.564997] [<80741a78>] __schedule+0x62c/0xaa8<br>
> [ 9.565428] [<80741f44>] schedule+0x50/0xf0<br>
> [ 9.565558] [<807454f8>] schedule_timeout+0x1ec/0x484<br>
> [ 9.565741] [<801c1580>] rcu_gp_kthread+0x5bc/0xa90<br>
> [ 9.565900] [<80161a74>] kthread+0xfc/0x114<br>
> [ 9.566035] [<80106a58>] ret_from_kernel_thread+0x14/0x1c<br> > [ 9.566478] Task dump for CPU 0:<br>
> [ 9.566603] swapper/0 R running task 0 0 0 0x00100000<br>
> [ 9.566828] Stack : 00000008 801e1874 808c21e4 81f5f618 808c2734 00000000 00000000 00000000<br>
> [ 9.567327] 00000002 ffffffe3 81f5d200 00000000 00000008 081b3200 00000008 c71dc863<br>
> [ 9.567862] 7fffffff ffffffff 80812ae8 00040900 808b0804 00000001 808b0000 80920000<br>
> [ 9.568331] 80812ae8 80920000 00000001 00000000 00000000 801e1c58 808b0804 00000001<br>
> [ 9.568751] 808b0000 80920000 808b0804 80192c4c 808b0000 80742390 00000000 00000000<br>
> [ 9.569239] ...<br>
> [ 9.569351] Call Trace:<br>
> [ 9.569509] [<80741a78>] __schedule+0x62c/0xaa8<br>
> [ 9.569758] Task dump for CPU 1:<br>
> [ 9.575233] cat R running task 0 93 88 0x08110004<br>
> [ 9.575695] Stack : 80aa9410 00000000 80ab0000 801ac6b8 00000000 00000000 80ab0000 801ac6b8<br>
> [ 9.576222] 0000001d 00000006 00000006 8fcfc900 00000000 00000000 0000000a 00000000<br>
> [ 9.576822] 00000000 80aa9412 0000001d 80aa9878 808b0000 808c24c0 808b0000 808b0808<br>
> [ 9.577385] 00000140 808b0000 00000000 00000000 00000000 00000000 00000000 00000000<br>
> [ 9.577911] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000<br>
> [ 9.578434] ...<br>
> [ 9.578574] Call Trace:<br>
> [ 9.578734] [<8010d8d0>] show_stack+0xa0/0xc4<br>
> [ 9.579025] [<8027c2e4>] rcu_dump_cpu_stacks+0xe8/0x128<br> > [ 9.579491] [<801c274c>] rcu_check_callbacks+0x854/0xa20<br> > [ 9.579936] [<801ca378>] update_process_times+0x4c/0x80<br> > [ 9.580254] [<801e1928>] tick_sched_handle.isra.4+0x34/0x94<br> > [ 9.580587] [<801e19f8>] tick_sched_timer+0x70/0xdc<br>
> [ 9.580944] [<801cb9b4>] __hrtimer_run_queues+0x144/0x3d8<br> > [ 9.581275] [<801cc6cc>] hrtimer_interrupt+0x118/0x338<br>
> [ 9.581582] [<80112580>] c0_compare_interrupt+0x8c/0xe4<br> > [ 9.582524] [<801aee0c>] __handle_irq_event_percpu+0x8c/0x2a0<br>
> [ 9.582939] [<801af078>] handle_irq_event_percpu+0x58/0xbc<br> > [ 9.583705] [<801b4820>] handle_percpu_irq+0x98/0xc8<br>
> [ 9.584026] [<801ae100>] generic_handle_irq+0x50/0x6c<br>
> [ 9.584392] [<80747e48>] do_IRQ+0x28/0x34<br>
> [ 9.585228] [<804a3800>] plat_irq_dispatch+0x64/0xb8<br>
> [ 9.585544] [<80106f68>] except_vec_vi_end+0xb8/0xc4<br>
> [ 9.586059] [<80306d7c>] path_init+0xe4/0x3b8<br>
> [ 9.587379] [<8030ac24>] path_openat+0x94/0x111c<br>
> [ 9.587725] [<8030d114>] do_filp_open+0xf4/0x138<br>
> [ 9.588053] [<802f6fc8>] do_sys_open+0x1c0/0x27c<br>
> [ 9.589432] [<80117f98>] syscall_common+0x34/0x58<br>
> [ 52.550795] INFO: rcu_sched self-detected stall on CPU<br>
> [ 52.552049] 1-...: (7 ticks this GP) idle=391/140000000000002/0 softirq=0/0 fqs=0<br>
> [ 52.552508] (t=32101 jiffies g=-290 c=-291 q=2422)<br>
> [ 10.105092] rcu_sched kthread starved for 32101 jiffies! g4294967006 c4294967005 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0<br>
> [ 12.124160] INFO: rcu_sched detected stalls on CPUs/tasks:<br>
> [ 13.123363] 1-...: (7 ticks this GP) idle=391/140000000000002/0 softirq=0/0 fqs=0<br>
> [ 15.121749] (detected by 0, t=32101 jiffies, g=-290, c=-291, q=2422)<br>
> [ 16.120913] Task dump for CPU 1:<br>
> [ 17.130901] cat R running task [ 19.129399] rcu_sched R<br>
> [ 20.128479] running task 0 7 2 0x00100000<br>
> Stack :<br>
> [ 23.126117] 81f642c0 8fca8280 8fcfc900 8fcfd1c0 8fcfc900 8fcffdf4 808b0000 8fcffdf4qemu-system-mips: terminating on signal 15 from pid 3927<br>
> ubuntu@ip-10-1-3-178:~/mipseb$<br>
><br>
><br>
> On Sat, Oct 6, 2018 at 10:18 AM Jun Sun <<a href="mailto:jsun@junsun.net" target="_blank">jsun@junsun.net</a>> wrote:<br>
>><br>
>> After I added "-cpu 34Kf", qemu would start normally again even with "-smp 2" option.<br>
>><br>
>> However, "cat /proc/cpuinfo" only shows 1 CPU. "uname -a" shows the following which seems to suggest the kernel is not SMP aware. Is there a kernel for malta with SMP support?<br>
>><br>
>> Linux debian-mips 4.9.0-7-4kc-malta #1 Debian 4.9.110-3+deb9u2 (2018-08-13) mips GNU/Linux<br>
>><br>
>> Thanks.<br>
>><br>
>> Jun<br>
>><br>
>> On Sat, Oct 6, 2018 at 8:47 AM Jun Sun <<a href="mailto:jsun@junsun.net" target="_blank">jsun@junsun.net</a>> wrote:<br>
>>><br>
>>> Hi, all,<br>
>>><br>
>>> I've been loosely following the instruct at this page, <a href="https://github.com/kholia/mips-hacking" rel="noreferrer" target="_blank">https://github.com/kholia/mips-hacking</a><br>
>>><br>
>>> My host is ubuntu 16.04. I used ubuntu prebuilt qemu system images.<br>
>>><br>
>>> My guest is the latest stretch 9.5 malta netboot images. Kernel is vmlinux-4.9.0-7-4kc-malta.<br>
>>><br>
>>> Below is my startup script. If I change "smp" to 2, the startup will hang very early on. Does anybody if this is a known limit with debian distro? Or it is an issue with the ubuntu prebuilt qemu? Or there are some other
gotcha's here?<br>
>>><br>
>>> qemu-system-mips \<br>
>>> -M malta \<br>
>>> -m 256 \<br>
>>> -hda hda.qcow2 \<br>
>>> -kernel vmlinux-4.9.0-7-4kc-malta \<br>
>>> -initrd initrd.img-4.9.0-7-4kc-malta \<br>
>>> -append "root=/dev/sda1 console=ttyS0 nokaslr" \<br>
>>> -nographic \<br>
>>> -redir tcp:2222::22 \<br>
>>> -smp 1 \<br>
>>> \<br>
>>><br>
>>> Cheers.<br>
>>><br>
>>> Jun<br>
>>><br>
>>><br>
>>><br>

-- <br>
YunQiang Su<br>
</blockquote></div>

--- SoupGate-Win32 v1.05
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QEMU hangs with smp option on ubuntu 16.04 ... any fix? (2/2)

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