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Message-ID: <539AB112.5030100@intel.com>
Date: Fri, 13 Jun 2014 16:06:42 +0800
From: Jet Chen <jet.chen@...el.com>
To: Marcelo Tosatti <mtosatti@...hat.com>
CC: Fengguang Wu <fengguang.wu@...el.com>,
Yuanhan Liu <yuanhan.liu@...el.com>, lkp@...org,
kvm@...r.kernel.org,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [x86: kvm] WARNING: at arch/x86/kernel/pvclock.c:182 pvclock_init_vsyscall()
Hi Marcelo,
0day kernel testing robot got the below dmesg and the first bad commit is
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 3dc4f7cfb7441e5e0fed3a02fc81cdaabd28300a
Author: Marcelo Tosatti <mtosatti@...hat.com>
AuthorDate: Tue Nov 27 23:28:56 2012 -0200
Commit: Marcelo Tosatti <mtosatti@...hat.com>
CommitDate: Tue Nov 27 23:29:10 2012 -0200
x86: kvm guest: pvclock vsyscall support
Hook into generic pvclock vsyscall code, with the aim to
allow userspace to have visibility into pvclock data.
Signed-off-by: Marcelo Tosatti <mtosatti@...hat.com>
+--------------------------------------------------------------+------------+------------+
| | 71056ae22d | 3dc4f7cfb7 |
+--------------------------------------------------------------+------------+------------+
| boot_successes | 60 | 0 |
| boot_failures | 0 | 20 |
| WARNING:at_arch/x86/kernel/pvclock.c:pvclock_init_vsyscall() | 0 | 20 |
| backtrace:pvclock_init_vsyscall | 0 | 20 |
| backtrace:warn_slowpath_null | 0 | 20 |
| backtrace:kvm_setup_vsyscall_timeinfo | 0 | 20 |
| backtrace:kvm_guest_init | 0 | 20 |
+--------------------------------------------------------------+------------+------------+
[ 0.000000] mapped IOAPIC to ffffffffff5f8000 (fec00000)
[ 0.000000] nr_irqs_gsi: 40
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: at arch/x86/kernel/pvclock.c:182 pvclock_init_vsyscall+0x21/0x59()
[ 0.000000] Hardware name: Bochs
[ 0.000000] Pid: 0, comm: swapper Not tainted 3.7.0-rc3-00112-g3dc4f7c #37
[ 0.000000] Call Trace:
[ 0.000000] [<ffffffff81062255>] warn_slowpath_common+0x7c/0x94
[ 0.000000] [<ffffffff81062343>] warn_slowpath_null+0x1a/0x1c
[ 0.000000] [<ffffffff81cdd7c9>] pvclock_init_vsyscall+0x21/0x59
[ 0.000000] [<ffffffff81cdd75b>] kvm_setup_vsyscall_timeinfo+0x59/0x8b
[ 0.000000] [<ffffffff81cdd4cf>] kvm_guest_init+0xe4/0xfe
[ 0.000000] [<ffffffff81cd2f9e>] setup_arch+0xa64/0xad9
[ 0.000000] [<ffffffff81cd0893>] start_kernel+0xdc/0x430
[ 0.000000] [<ffffffff81cd0120>] ? early_idt_handlers+0x120/0x120
[ 0.000000] [<ffffffff81cd02b4>] x86_64_start_reservations+0xb0/0xb3
[ 0.000000] [<ffffffff81cd03b9>] x86_64_start_kernel+0x102/0x10f
[ 0.000000] ---[ end trace c4149eb8555303de ]---
[ 0.000000] e820: [mem 0x14000000-0xfeffbfff] available for PCI devices
git bisect start 749387dc8d8270b279f27a0a794cdf4f4a4aa774 v3.7 --
git bisect bad e32795503de02da4e7e74a5e039cc268f6a0ecfb # 23:38 0- 13 Merge tags 'dt-for-linus', 'gpio-for-linus' and 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6
git bisect bad e777d192ffb9f2929d547a2f8a5f65b7db7a9552 # 00:25 0- 4 Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
git bisect good 50851c6248e1a13c45d97c41f6ebcf716093aa5e # 00:43 20+ 0 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
git bisect good 698d601224824bc1a5bf17f3d86be902e2aabff0 # 01:11 20+ 0 Merge tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
git bisect good 8d9ea7172edd2e52da26b9485b4c97969a0d2648 # 01:34 20+ 0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
git bisect bad 66cdd0ceaf65a18996f561b770eedde1d123b019 # 01:57 0- 3 Merge tag 'kvm-3.8-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
git bisect good 3127f23f013eabe9b58132c05061684c49146ba3 # 02:12 20+ 0 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
git bisect good c7708fac5a878d6e0f2de0aa19f9749cff4f707f # 02:31 20+ 0 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
git bisect good 896ea17d3da5f44b2625c9cda9874d7dfe447393 # 02:42 20+ 0 Merge tag 'stable/for-linus-3.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
git bisect good 8455d79e2163997e479931b8d5b7e60a92cd2b86 # 02:49 20+ 0 KVM: PPC: Book3S HV: Run virtual core whenever any vcpus in it can run
git bisect bad 78c634402a1825f1f5bef13077f0985f3b8a3212 # 03:10 0- 6 kvm: deliver msi interrupts from irq handler
git bisect good 189e11731aa858597095fbe1e6d243bad26bd96b # 03:44 20+ 0 x86: pvclock: add note about rdtsc barriers
git bisect bad b48aa97e38206a84bf8485e7c553412274708ce5 # 04:09 0- 11 KVM: x86: require matched TSC offsets for master clock
git bisect bad 886b470cb14733a0286e365c77f1844c240c33a4 # 04:33 0- 13 KVM: x86: pass host_tsc to read_l1_tsc
git bisect good 71056ae22d43f58d7e0f793af18ace2eaf5b74eb # 04:58 20+ 0 x86: pvclock: generic pvclock vsyscall initialization
git bisect bad 51c19b4f5927f5a646e93d69f73c7e89ea14e737 # 05:16 0- 15 x86: vdso: pvclock gettime support
git bisect bad 3dc4f7cfb7441e5e0fed3a02fc81cdaabd28300a # 05:40 0- 6 x86: kvm guest: pvclock vsyscall support
# first bad commit: [3dc4f7cfb7441e5e0fed3a02fc81cdaabd28300a] x86: kvm guest: pvclock vsyscall support
git bisect good 71056ae22d43f58d7e0f793af18ace2eaf5b74eb # 05:42 60+ 0 x86: pvclock: generic pvclock vsyscall initialization
git bisect good d67a0e110187abd560a1de63fa172894a52839d5 # 05:45 60+ 0 morphologies: Enable CONFIG_FHANDLE
git bisect good 0e04c641b199435f3779454055f6a7de258ecdfc # 06:06 60+ 0 Merge tag 'dm-3.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
git bisect good b1cce620fd4b6864c92e7307be7839789f9c8be0 # 06:09 60+ 0 Add linux-next specific files for 20140612
This script may reproduce the error.
-----------------------------------------------------------------------------
#!/bin/bash
kernel=$1
initrd=yocto-minimal-x86_64.cgz
wget --no-clobber https://github.com/fengguang/reproduce-kernel-bug/blob/master/initrd/$initrd
kvm=(
qemu-system-x86_64 -cpu kvm64 -enable-kvm
-kernel $kernel
-initrd $initrd
-smp 2
-m 256M
-net nic,vlan=0,macaddr=00:00:00:00:00:00,model=virtio
-net user,vlan=0
-net nic,vlan=1,model=e1000
-net user,vlan=1
-boot order=nc
-no-reboot
-watchdog i6300esb
-serial stdio
-display none
-monitor null
)
append=(
debug
sched_debug
apic=debug
ignore_loglevel
sysrq_always_enabled
panic=10
prompt_ramdisk=0
earlyprintk=ttyS0,115200
console=ttyS0,115200
console=tty0
vga=normal
root=/dev/ram0
rw
)
"${kvm[@]}" --append "${append[*]}"
-----------------------------------------------------------------------------
Thanks,
Jet
View attachment "dmesg-yocto-ivb42-10:20140613054112:x86_64-randconfig-j1-0612:3.7.0-rc3-00112-g3dc4f7c:37" of type "text/plain" (83547 bytes)
Download attachment "x86_64-randconfig-j1-0612-749387dc8d8270b279f27a0a794cdf4f4a4aa774-WARNING:---at----pvclock_init_vsyscall+-x-43485.log" of type "application/octet-stream" (49070 bytes)
View attachment "config-3.7.0-rc3-00112-g3dc4f7c" of type "text/plain" (51968 bytes)
View attachment "Attached Message Part" of type "text/plain" (87 bytes)
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