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Message-ID: <20200326091256.GR11705@shao2-debian>
Date: Thu, 26 Mar 2020 17:12:56 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Peter Zijlstra <peterz@...radead.org>,
Masami Hiramatsu <mhiramat@...nel.org>,
Alexei Starovoitov <alexei.starovoitov@...il.com>,
Peter Wu <peter@...ensteyn.nl>,
Jonathan Corbet <corbet@....net>,
Tom Zanussi <zanussi@...nel.org>,
Shuah Khan <shuahkhan@...il.com>, bpf <bpf@...r.kernel.org>,
lkp@...ts.01.org
Subject: [tracing] cd8f62b481:
BUG:sleeping_function_called_from_invalid_context_at_mm/slab.h
FYI, we noticed the following commit (built with gcc-7):
commit: cd8f62b481530fafbeacee0d3283b60bcf42d854 ("[PATCH 02/12 v2] tracing: Save off entry when peeking at next entry")
url: https://github.com/0day-ci/linux/commits/Steven-Rostedt/ring-buffer-tracing-Remove-disabling-of-ring-buffer-while-reading-trace-file/20200320-073240
in testcase: rcuperf
with following parameters:
runtime: 300s
perf_type: rcu
on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+----------------------------------------------------------------+------------+------------+
| | 2e2bf17ca0 | cd8f62b481 |
+----------------------------------------------------------------+------------+------------+
| boot_successes | 13 | 0 |
| boot_failures | 0 | 8 |
| BUG:sleeping_function_called_from_invalid_context_at_mm/slab.h | 0 | 8 |
+----------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>
[ 16.821280] BUG: sleeping function called from invalid context at mm/slab.h:565
[ 16.822211] in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 158, name: rcu_perf_writer
[ 16.823164] no locks held by rcu_perf_writer/158.
[ 16.823650] CPU: 0 PID: 158 Comm: rcu_perf_writer Not tainted 5.6.0-rc6-00081-gcd8f62b481530f #1
[ 16.824856] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 16.826220] Call Trace:
[ 16.826667] dump_stack+0x16/0x18
[ 16.827265] ___might_sleep+0x104/0x118
[ 16.827947] __might_sleep+0x69/0x70
[ 16.828600] ? __fs_reclaim_release+0x17/0x19
[ 16.829374] slab_pre_alloc_hook+0x34/0x6e
[ 16.830107] __kmalloc+0x48/0xe8
[ 16.830710] ? rb_reader_unlock+0x2b/0x3c
[ 16.831205] ? trace_find_next_entry+0x84/0x133
[ 16.831723] trace_find_next_entry+0x84/0x133
[ 16.832217] trace_print_lat_context+0x4b/0x437
[ 16.832730] ? rb_event_length+0x56/0x67
[ 16.833186] ? ring_buffer_event_length+0x34/0x79
[ 16.833728] ? __find_next_entry+0xd3/0x1c2
[ 16.834190] print_trace_line+0x69d/0x767
[ 16.834666] ftrace_dump+0x285/0x437
[ 16.835055] rcu_perf_writer+0x25f/0x34e
[ 16.835476] kthread+0xdf/0xe1
[ 16.835823] ? rcu_perf_reader+0x9c/0x9c
[ 16.836264] ? kthread_create_worker_on_cpu+0x1c/0x1c
[ 16.836834] ret_from_fork+0x2e/0x38
[ 16.837270] rb_produ-160 0.... 6528532us : ring_buffer_producer: Starting ring buffer hammer
[ 16.838318] rb_produ-160 0.... 16529141us : ring_buffer_producer: End ring buffer hammer
[ 16.839349] rb_produ-160 0.... 16558157us : ring_buffer_producer: Running Consumer at nice: 19
[ 16.840382] rb_produ-160 0.... 16558162us : ring_buffer_producer: Running Producer at nice: 19
[ 16.841401] rb_produ-160 0.... 16558163us : ring_buffer_producer: WARNING!!! This test is running at lowest priority.
[ 16.854781] rb_produ-160 0.... 16558164us : ring_buffer_producer: Time: 10000604 (usecs)
[ 16.857354] rb_produ-160 0.... 16558165us : ring_buffer_producer: Overruns: 6117960
[ 16.858322] rb_produ-160 0.... 16558166us : ring_buffer_producer: Read: 4356190 (by events)
[ 16.859404] rb_produ-160 0.... 16558167us : ring_buffer_producer: Entries: 44650
[ 16.860329] rb_produ-160 0.... 16558167us : ring_buffer_producer: Total: 10518800
[ 16.861226] rb_produ-160 0.... 16558168us : ring_buffer_producer: Missed: 0
[ 16.862124] rb_produ-160 0.... 16558169us : ring_buffer_producer: Hit: 10518800
[ 16.863087] rb_produ-160 0.... 16558170us : ring_buffer_producer: Entries per millisec: 1051
[ 16.864123] rb_produ-160 0.... 16558171us : ring_buffer_producer: 951 ns per entry
[ 16.865074] rb_produ-160 0.... 16558172us : ring_buffer_producer_thread: Sleeping for 10 secs
[ 16.866105] ---------------------------------
[ 16.866725] rcu-perf: Test complete
[ 16.878198] random: fast init done
Elapsed time: 60
qemu-img create -f qcow2 disk-vm-snb-i386-9-0 256G
qemu-img create -f qcow2 disk-vm-snb-i386-9-1 256G
qemu-img create -f qcow2 disk-vm-snb-i386-9-2 256G
qemu-img create -f qcow2 disk-vm-snb-i386-9-3 256G
qemu-img create -f qcow2 disk-vm-snb-i386-9-4 256G
qemu-img create -f qcow2 disk-vm-snb-i386-9-5 256G
qemu-img create -f qcow2 disk-vm-snb-i386-9-6 256G
kvm=(
qemu-system-i386
-enable-kvm
-cpu SandyBridge
-kernel $kernel
-initrd initrd-vm-snb-i386-9.cgz
-m 8192
-smp 2
-device e1000,netdev=net0
-netdev user,id=net0,hostfwd=tcp::32032-:22
-boot order=nc
-no-reboot
-watchdog i6300esb
-watchdog-action debug
-rtc base=localtime
-drive file=disk-vm-snb-i386-9-0,media=disk,if=virtio
-drive file=disk-vm-snb-i386-9-1,media=disk,if=virtio
-drive file=disk-vm-snb-i386-9-2,media=disk,if=virtio
-drive file=disk-vm-snb-i386-9-3,media=disk,if=virtio
-drive file=disk-vm-snb-i386-9-4,media=disk,if=virtio
-drive file=disk-vm-snb-i386-9-5,media=disk,if=virtio
-drive file=disk-vm-snb-i386-9-6,media=disk,if=virtio
-serial stdio
-display none
-monitor null
)
append=(
ip=::::vm-snb-i386-9::dhcp
root=/dev/ram0
user=lkp
job=/job-script
ARCH=i386
kconfig=i386-randconfig-g003-20200324
branch=linux-devel/devel-hourly-2020032505
commit=cd8f62b481530fafbeacee0d3283b60bcf42d854
BOOT_IMAGE=/pkg/linux/i386-randconfig-g003-20200324/gcc-7/cd8f62b481530fafbeacee0d3283b60bcf42d854/vmlinuz-5.6.0-rc6-00081-gcd8f62b481530f
max_uptime=1500
RESULT_ROOT=/result/rcuperf/rcu-300s/vm-snb-i386/yocto-i386-minimal-20190520.cgz/i386-randconfig-g003-20200324/gcc-7/cd8f62b481530fafbeacee0d3283b60bcf42d854/3
result_service=tmpfs
selinux=0
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
net.ifnames=0
To reproduce:
# build kernel
cd linux
cp config-5.6.0-rc6-00081-gcd8f62b481530f .config
make HOSTCC=gcc-7 CC=gcc-7 ARCH=i386 olddefconfig prepare modules_prepare bzImage
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Rong Chen
View attachment "config-5.6.0-rc6-00081-gcd8f62b481530f" of type "text/plain" (111786 bytes)
View attachment "job-script" of type "text/plain" (4468 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (11948 bytes)
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