Am 2021-01-13 09:51, schrieb Rolf Eike Beer:
Every one ine a while my T5120 locks up, i.e. some processes get stuck
forever.
Starting new screen sessions or logging in via SSH luckily still works,
but I
can't get it to properly reboot. Sync via sysrq has worked today which
is quite
nice, but the software RAID still needs rebuild :/
This usually happens when I torture the machine with parallel builds
and testsuites
when doing package stabilizations for Gentoo.
The kernel currently is 5.10.3, but I hit this for quite a while
Here is what came out of dmesg today. I found no signs of trouble
earlier than this:
And here it is again:
[667028.274283] many-headers[40569]: segfault at 0 ip 00000000700007c0
(rpc 000000007000073c) sp 00000000ff9eddf8 error 1 in
many-headers[70000000+2000]
[671105.790298] rcu: INFO: rcu_sched self-detected stall on CPU
[671105.790512] rcu: 24-....: (2099 ticks this GP)
idle=c3a/1/0x4000000000000002 softirq=12392985/12392985 fqs=1033
[671105.790709] (t=2100 jiffies g=37879413 q=5992)
[671105.790859] * CPU[ 24]: TSTATE[0000000080001601]
TPC[000000000040770c] TNPC[0000000000407710] TASK[ctest:50100]
[671105.791083] TPC[sparc64_realfault_common+0x8/0x20]
O7[sparc64_realfault_common+0x10/0x20] I7[0xf76e6e3c]
RPC[do_signal+0x1a0/0x560]
[671168.853244] rcu: INFO: rcu_sched self-detected stall on CPU
[671168.853475] rcu: 24-....: (8402 ticks this GP)
idle=c3a/1/0x4000000000000002 softirq=12392985/12392985 fqs=4100
[671168.853684] (t=8403 jiffies g=37879413 q=64804)
[671168.853843] * CPU[ 24]: TSTATE[0000000080001601]
TPC[000000000040770c] TNPC[0000000000407710] TASK[ctest:50100]
[671168.854072] TPC[sparc64_realfault_common+0x8/0x20]
O7[sparc64_realfault_common+0x10/0x20] I7[0xf76e6e3c]
RPC[do_signal+0x1a0/0x560]
[671231.926163] rcu: INFO: rcu_sched self-detected stall on CPU
[671231.926395] rcu: 24-....: (14706 ticks this GP)
idle=c3a/1/0x4000000000000002 softirq=12392985/12392985 fqs=6738
[671231.926610] (t=14707 jiffies g=37879413 q=82515)
[671231.926781] * CPU[ 24]: TSTATE[0000000080001602]
TPC[0000000000af61e0] TNPC[0000000000af61e4] TASK[ctest:50100]
[671231.927033] TPC[do_sparc64_fault+0x340/0x820]
O7[do_sparc64_fault+0x56c/0x820] I7[sparc64_realfault_common+0x10/0x20]
RPC[0xf76e6e3c]
[671277.260094] INFO: task khugepaged:337 blocked for more than 122
seconds.
[671277.260277] Not tainted 5.10.3-gentoo-sparc64 #1
[671277.260399] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[671277.260528] task:khugepaged state:D stack: 0 pid: 337 ppid:
2 flags:0x01000000
[671277.260666] Call Trace:
[671277.260765] [<0000000000af0ae0>] schedule+0x40/0xe0
[671277.260898] [<0000000000af4018>] schedule_timeout+0x1f8/0x380
[671277.261028] [<0000000000af1c80>] wait_for_completion+0x60/0xc0
[671277.261163] [<000000000047de70>] __flush_work.isra.0+0xf0/0x220
[671277.261234] [<0000000000597954>] lru_add_drain_all+0x1b4/0x240
[671277.261306] [<00000000006052c4>] khugepaged+0x44/0x1e40
[671277.261377] [<0000000000485a04>] kthread+0x104/0x120
[671277.261453] [<00000000004060c8>] ret_from_fork+0x1c/0x2c
[671277.261520] [<0000000000000000>] 0x0
[671277.261605] INFO: task md127_raid1:1100 blocked for more than 122
seconds.
[671277.261673] Not tainted 5.10.3-gentoo-sparc64 #1
[671277.261737] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[671277.261806] task:md127_raid1 state:D stack: 0 pid: 1100 ppid:
2 flags:0x01000000
[671277.261883] Call Trace:
[671277.261939] [<0000000000af0ae0>] schedule+0x40/0xe0
[671277.262018] [<00000000007a3694>]
percpu_ref_switch_to_atomic_sync+0x34/0x80
[671277.262097] [<00000000009199e0>] set_in_sync+0x40/0xe0
[671277.262168] [<0000000000928280>] md_check_recovery+0x520/0x5c0
[671277.262242] [<00000000008f17f4>] raid1d+0x14/0x1380
[671277.262313] [<000000000091a54c>] md_thread+0xac/0x1a0
[671277.262382] [<0000000000485a04>] kthread+0x104/0x120
[671277.262453] [<00000000004060c8>] ret_from_fork+0x1c/0x2c
[671277.262519] [<0000000000000000>] 0x0
[671277.262601] INFO: task jbd2/dm-0-8:1208 blocked for more than 122
seconds.
[671277.262670] Not tainted 5.10.3-gentoo-sparc64 #1
and so on.
