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Date: Sat, 14 Feb 2015 09:26:59 +0800
From: Fengguang Wu <fengguang.wu@...el.com>
To: Stephen Rothwell <sfr@...b.auug.org.au>
Cc: LKP <lkp@...org>, linux-kernel@...r.kernel.org,
Linux Memory Management List <linux-mm@...ck.org>
Subject: [akpm merge] BUG: non-zero nr_pmds on freeing mm: 2
Hi Stephen,
0day kernel testing robot got the below dmesg and the first bad commit is
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 8fe7fba50596a8efb6e1ef15b1b4890f95eeffcd
Merge: 2ef44b3 d07b956
Author: Stephen Rothwell <sfr@...b.auug.org.au>
AuthorDate: Fri Feb 13 15:56:51 2015 +1100
Commit: Stephen Rothwell <sfr@...b.auug.org.au>
CommitDate: Fri Feb 13 15:56:51 2015 +1100
Merge branch 'akpm-current/current'
Conflicts:
arch/x86/include/asm/pgtable_64.h
include/linux/memcontrol.h
include/linux/mm.h
include/linux/slab.h
include/linux/swapops.h
kernel/fork.c
lib/Makefile
mm/memcontrol.c
mm/mprotect.c
mm/slab.h
mm/slab_common.c
mm/swap.c
scripts/module-common.lds
+------------------------------------+------------+------------+------------+---------------+
| | 2ef44b3a9e | d07b956c65 | 8fe7fba505 | next-20150213 |
+------------------------------------+------------+------------+------------+---------------+
| boot_successes | 60 | 60 | 0 | 0 |
| boot_failures | 0 | 0 | 20 | 14 |
| BUG:non-zero_nr_pmds_on_freeing_mm | 0 | 0 | 20 | 14 |
+------------------------------------+------------+------------+------------+---------------+
[ 2.209695] debug: unmapping init [mem 0xffff88000ff75000-0xffff88000fffffff]
[ 2.210862] debug: unmapping init [mem 0xffff8800103d1000-0xffff8800103fffff]
[ 2.217056] random: init urandom read with 3 bits of entropy available
[ 2.219092] BUG: non-zero nr_pmds on freeing mm: 2
[ 2.221865] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.224047] BUG: non-zero nr_pmds on freeing mm: 2
[ 2.225538] hostname (100) used greatest stack depth: 14200 bytes left
[ 2.226392] BUG: non-zero nr_pmds on freeing mm: 4
[ 2.227118] mount (97) used greatest stack depth: 14104 bytes left
[ 2.227811] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.228896] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.230337] BUG: non-zero nr_pmds on freeing mm: 2
[ 2.231197] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.233237] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.234339] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.235530] BUG: non-zero nr_pmds on freeing mm: 2
[ 2.237687] BUG: non-zero nr_pmds on freeing mm: 4
[ 2.240279] BUG: non-zero nr_pmds on freeing mm: 4
[ 2.241549] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.242726] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.243792] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.244839] BUG: non-zero nr_pmds on freeing mm: 2
[ 2.245741] BUG: non-zero nr_pmds on freeing mm: 4
[ 2.246546] BUG: non-zero nr_pmds on freeing mm: 3
/bin/sh: /proc/self/fd/9: No such file or directory
[ 2.249348] BUG: non-zero nr_pmds on freeing mm: 4
[ 2.250126] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.251983] BUG: non-zero nr_pmds on freeing mm: 4
[ 2.253333] BUG: non-zero nr_pmds on freeing mm: 2
[ 2.255435] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.256551] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.259066] BUG: non-zero nr_pmds on freeing mm: 3
[ 2.260070] BUG: non-zero nr_pmds on freeing mm: 4
[ 2.260977] BUG: non-zero nr_pmds on freeing mm: 4
[ 2.262336] BUG: non-zero nr_pmds on freeing mm: 2
[ 2.264123] sh (122) used greatest stack depth: 13992 bytes left
[ 2.264831] BUG: non-zero nr_pmds on freeing mm: 4
[ 2.266065] BUG: non-zero nr_pmds on freeing mm: 2
/bin/sh: /proc/self/fd/9: No such file or directory
[ 2.268783] BUG: non-zero nr_pmds on freeing mm: 4
[ 2.269971] BUG: non-zero nr_pmds on freeing mm: 2
/bin/sh: /proc/self/fd/9: No such file or directory
[ 2.272452] BUG: non-zero nr_pmds on freeing mm: 4
Elapsed time: 5
qemu-system-x86_64 -cpu kvm64 -enable-kvm -kernel /kernel/x86_64-randconfig-n0-02131024/8fe7fba50596a8efb6e1ef15b1b4890f95eeffcd/vmlinuz-3.19.0-g8fe7fba -append 'hung_task_panic=1 earlyprintk=ttyS0,115200 rd.udev.log-priority=err systemd.log_target=journal systemd.log_level=warning debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal root=/dev/ram0 rw link=/kbuild-tests/run-queue/kvm/x86_64-randconfig-n0-02131024/next:master:8fe7fba50596a8efb6e1ef15b1b4890f95eeffcd:bisect-linux-7/.vmlinuz-8fe7fba50596a8efb6e1ef15b1b4890f95eeffcd-20150213172638-7-client7 branch=next/master BOOT_IMAGE=/kernel/x86_64-randconfig-n0-02131024/8fe7fba50596a8efb6e1ef15b1b4890f95eeffcd/vmlinuz-3.19.0-g8fe7fba drbd.minor_count=8' -initrd /kernel-tests/initrd/quantal-core-x86_64.cgz -m 320 -smp 2 -net nic,vlan=1,model=e1000 -net user,vlan=1 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -pidfile /dev/shm/kboot/pid-quantal-client7-5 -serial file:/dev/shm/kboot/serial-quantal-client7-5 -daemonize -display none -monitor null
git bisect start b8acf73194186a5cba86812eb4ba17b897f0e13e bfa76d49576599a4b9f9b7a71f23d73d6dcff735 --
git bisect good 15763db134dd60504dbd93137e6654f06d639acf # 15:04 20+ 0 Merge branch 'for-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
git bisect good 6e822065fa5ce80b14e82948c86d91b1844a4092 # 16:13 20+ 0 Merge remote-tracking branch 'char-misc/char-misc-next'
git bisect good e4bd2bf79cef1c75552eab6a8623a7005335b361 # 16:35 20+ 0 Merge remote-tracking branch 'clk/clk-next'
git bisect good 806acae0b8ec190eacb14c5db56fa492353d8672 # 17:04 20+ 0 Merge remote-tracking branch 'y2038/y2038'
git bisect bad 8fe7fba50596a8efb6e1ef15b1b4890f95eeffcd # 17:29 0- 20 Merge branch 'akpm-current/current'
git bisect good 2ef44b3a9ead3e81621386b9227f3c12da95a05d # 18:07 20+ 0 Merge remote-tracking branch 'access_once/linux-next'
git bisect good 9ddc30fda3048a05dfb377422a560709bfd6b95a # 18:28 20+ 0 x86-add-pmd_-for-thp-fix
git bisect good 78baabee9d8ed5eca4d6c3e11282f131aad503d5 # 18:58 20+ 0 irq: use %*pb[l] to print bitmaps including cpumasks and nodemasks
git bisect good df9fbe22ce6f7048ceb77c2ca72b27066ae75509 # 19:22 20+ 0 fs-befs-linuxvfsc-remove-unnecessary-casting-fix
git bisect good 3a1f139f4faaa9e30d7d72f5328410b430f3f74e # 19:43 20+ 0 scripts/gdb: add cache for type objects
git bisect good 97dc3f62c8f37795cdee3001e86c346dd7f7a879 # 20:09 20+ 0 scripts/gdb: add internal helper and convenience function for per-cpu lookup
git bisect good 135b2593df87b40d0eab61d7e3183106ef622bdf # 20:26 20+ 0 scripts/gdb: convert ModuleList to generator function
git bisect good e0c48fa7b961ea3e420c60fcddd3100b3413546a # 20:58 20+ 0 ipc,sem: use current->state helpers
git bisect good b4970b267279135de6984f101bde0ad7c49bb619 # 21:20 20+ 0 samples-seccomp-improve-label-helper-fix
git bisect good d07b956c650ad58a8ce00517515ebaf962e1f5c7 # 21:42 20+ 0 scripts/gdb: Add infrastructure
# first bad commit: [8fe7fba50596a8efb6e1ef15b1b4890f95eeffcd] Merge branch 'akpm-current/current'
git bisect good 2ef44b3a9ead3e81621386b9227f3c12da95a05d # 21:44 60+ 0 Merge remote-tracking branch 'access_once/linux-next'
git bisect good d07b956c650ad58a8ce00517515ebaf962e1f5c7 # 21:46 60+ 0 scripts/gdb: Add infrastructure
# extra tests on HEAD of next/master
git bisect bad b8acf73194186a5cba86812eb4ba17b897f0e13e # 21:46 0- 14 Add linux-next specific files for 20150213
# extra tests on tree/branch next/master
git bisect bad b8acf73194186a5cba86812eb4ba17b897f0e13e # 21:46 0- 14 Add linux-next specific files for 20150213
# extra tests on tree/branch linus/master
# extra tests on tree/branch next/master
git bisect bad b8acf73194186a5cba86812eb4ba17b897f0e13e # 22:02 0- 14 Add linux-next specific files for 20150213
This script may reproduce the error.
----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
initrd=quantal-core-x86_64.cgz
wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/raw/master/initrd/$initrd
kvm=(
qemu-system-x86_64
-cpu kvm64
-enable-kvm
-kernel $kernel
-initrd $initrd
-m 320
-smp 2
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-rtc base=localtime
-serial stdio
-display none
-monitor null
)
append=(
hung_task_panic=1
earlyprintk=ttyS0,115200
rd.udev.log-priority=err
systemd.log_target=journal
systemd.log_level=warning
debug
apic=debug
sysrq_always_enabled
rcupdate.rcu_cpu_stall_timeout=100
panic=-1
softlockup_panic=1
nmi_watchdog=panic
oops=panic
load_ramdisk=2
prompt_ramdisk=0
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
drbd.minor_count=8
)
"${kvm[@]}" --append "${append[*]}"
----------------------------------------------------------------------------
Thanks,
Fengguang
View attachment "dmesg-quantal-client7-5:20150213172913:x86_64-randconfig-n0-02131024:3.19.0-g8fe7fba:5" of type "text/plain" (21776 bytes)
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