From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 37732] New: intel-kvm/ksmd gp fault after some page scan
changes in /sys/kernel/mm/ksm/
Date: Fri, 17 Jun 2011 06:12:17 GMT
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Summary: intel-kvm/ksmd gp fault after some page scan changes
in /sys/kernel/mm/ksm/
Product: Virtualization
Version: unspecified
Kernel Version: 2.6.38.5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: kvm
AssignedTo: virtualization_kvm@kernel-bugs.osdl.org
ReportedBy: kon@ak-electron.eu
Regression: No
Hi,
the followring trace occured on our hardware machine
Jun 16 21:34:01 dezem kernel: [3317439.691539] general protection fault: 0000
[#1] SMP
Jun 16 21:34:01 dezem kernel: [3317439.691575] last sysfs file:
/sys/devices/pci0000:00/0000:00:1c.4/0000:06:00.0/irq
Jun 16 21:34:01 dezem kernel: [3317439.691623] CPU 2
Jun 16 21:34:01 dezem kernel: [3317439.691630] Modules linked in:
iptable_filter ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs exportfs
reiserfs tpm tpm_bios timeriomem_rng xt_tcpudp ipt_MASQUERADE iptable_nat
nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables x_tables bridge
stp kvm_intel kvm snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel
snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy
snd_seq_oss snd_seq_midi snd_rawmidi fbcon snd_seq_midi_event snd_seq tileblit
font snd_timer bitblit snd_seq_device softcursor snd radeon ttm drm_kms_helper
drm psmouse i2c_algo_bit i7core_edac soundcore edac_core snd_page_alloc
serio_raw multipath linear aacraid 3w_9xxx 3w_xxxx raid10 raid456
async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx raid1
raid0 r8169 ahci libahci mii sata_nv sata_sil sata_via [last unloaded:
virtio_rng]
Jun 16 21:34:01 dezem kernel: [3317439.692139]
Jun 16 21:34:01 dezem kernel: [3317439.692161] Pid: 50, comm: ksmd Not tainted
2.6.38.5 #4 MSI MS-7522/MSI X58 Pro-E (MS-7522)
Jun 16 21:34:01 dezem kernel: [3317439.692222] RIP: 0010:[]
[] kvm_set_pte_rmapp+0x56/0x140 [kvm]
Jun 16 21:34:01 dezem kernel: [3317439.692287] RSP: 0018:ffff88060c7f9c30
EFLAGS: 00010202
Jun 16 21:34:01 dezem kernel: [3317439.692316] RAX: 00008804530057f8 RBX:
00008804530057f8 RCX: ffff880569a61050
Jun 16 21:34:01 dezem kernel: [3317439.692363] RDX: 0000000000000000 RSI:
ffffc90016c1eff8 RDI: ffff88060d30c000
Jun 16 21:34:01 dezem kernel: [3317439.692410] RBP: ffff88060c7f9c70 R08:
ffff88060c4f43e0 R09: 0000000000000000
Jun 16 21:34:01 dezem kernel: [3317439.692456] R10: ffffea001507f2d0 R11:
00000000001a7188 R12: ffff88060d30c000
Jun 16 21:34:01 dezem kernel: [3317439.692503] R13: ffffc90016c1eff8 R14:
ffff88060c7f9d00 R15: 00000000005b94bd
Jun 16 21:34:01 dezem kernel: [3317439.692551] FS: 0000000000000000(0000)
GS:ffff8800bf440000(0000) knlGS:0000000000000000
Jun 16 21:34:01 dezem kernel: [3317439.692600] CS: 0010 DS: 0000 ES: 0000 CR0:
000000008005003b
Jun 16 21:34:01 dezem kernel: [3317439.692630] CR2: 00007fda2accc538 CR3:
000000000171f000 CR4: 00000000000026e0
Jun 16 21:34:01 dezem kernel: [3317439.692677] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Jun 16 21:34:01 dezem kernel: [3317439.692724] DR3: 0000000000000000 DR6:
00000000ffff0ff0 DR7: 0000000000000400
Jun 16 21:34:01 dezem kernel: [3317439.692771] Process ksmd (pid: 50,
threadinfo ffff88060c7f8000, task ffff88060c7f7710)
Jun 16 21:34:01 dezem kernel: [3317439.692819] Stack:
Jun 16 21:34:01 dezem kernel: [3317439.692840] ffff88060c7f7748
0000000602456000 ffff88060c7f7748 ffff880569a61000
Jun 16 21:34:01 dezem kernel: [3317439.692895] 0000000000000001
ffff880569a61060 00007f99fe13a000 0000000000000060
Jun 16 21:34:01 dezem kernel: [3317439.692950] ffff88060c7f9cf0
ffffffffa043f57c 0000000000012140 ffff880569a61050
Jun 16 21:34:01 dezem kernel: [3317439.693005] Call Trace:
Jun 16 21:34:01 dezem kernel: [3317439.693036] []
kvm_handle_hva+0xbc/0x1a0 [kvm]
Jun 16 21:34:01 dezem kernel: [3317439.693074] [] ?
kvm_set_pte_rmapp+0x0/0x140 [kvm]
Jun 16 21:34:01 dezem kernel: [3317439.693112] []
kvm_set_spte_hva+0x21/0x30 [kvm]
Jun 16 21:34:01 dezem kernel: [3317439.693145] [] ?
_raw_spin_lock+0xe/0x20
Jun 16 21:34:01 dezem kernel: [3317439.693180] []
kvm_mmu_notifier_change_pte+0x5a/0x90 [kvm]
Jun 16 21:34:01 dezem kernel: [3317439.693229] []
__mmu_notifier_change_pte+0x3e/0x90
Jun 16 21:34:01 dezem kernel: [3317439.693262] []
try_to_merge_with_ksm_page+0x318/0x5f0
Jun 16 21:34:01 dezem kernel: [3317439.693295] [] ?
follow_trans_huge_pmd+0x3d/0x130
Jun 16 21:34:01 dezem kernel: [3317439.693327] []
ksm_scan_thread+0x69d/0xdd0
Jun 16 21:34:01 dezem kernel: [3317439.693360] [] ?
autoremove_wake_function+0x0/0x40
Jun 16 21:34:01 dezem kernel: [3317439.693392] [] ?
ksm_scan_thread+0x0/0xdd0
Jun 16 21:34:01 dezem kernel: [3317439.693423] []
kthread+0x96/0xa0
Jun 16 21:34:01 dezem kernel: [3317439.693453] []
kernel_thread_helper+0x4/0x10
Jun 16 21:34:01 dezem kernel: [3317439.693485] [] ?
kthread+0x0/0xa0
Jun 16 21:34:01 dezem kernel: [3317439.693514] [] ?
kernel_thread_helper+0x0/0x10
Jun 16 21:34:01 dezem kernel: [3317439.693544] Code: 48 89 f8 0f 1f 40 00 31 d2
49 89 c7 4c 89 ee 49 c1 e7 12 4c 89 e7 49 c1 ef 1e e8 86 d0 ff ff 48 89 c3 48
85 c0 0f 84 82 00 00 00 <48> 8b 00 48 8b 15 50 5a 02 00 48 39 d0 74 61 48 3b 05
4c 5a 02
Jun 16 21:34:01 dezem kernel: [3317439.693746] RIP []
kvm_set_pte_rmapp+0x56/0x140 [kvm]
Jun 16 21:34:01 dezem kernel: [3317439.693786] RSP
Jun 16 21:34:01 dezem kernel: [3317439.694036] ---[ end trace 2a7d82397ef2ccf5
]---
about one hour later we have rebooted your physical server.
We are running with 1 Intel i7 950, 24GB RAM,our VM's don't using the
HyperThreading feature at all cause threads per core is setted to one.
I believe the problem could be HyperThreading cause i have never seen this on
AMD machines :-)
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