[Xen-devel] kernel BUG at arch/x86/xen/mmu.c:1860!

[Teck Choon Giam <giamteckchoon@xxxxxxxxx>]

Hi,

Information: CentOS 5.5 x86_64
dom0: latest xen/stable-2.6.32.x pvops git commit 75cc13f5aa29b4f3227d269ca165dfa8937c94fe
xen version: xen-4.0.2-rc1-pre from xen-4.0-testing.hg changeset 21422

While doing LVM snapshot for migration and get the following:

Dec 26 15:58:29 xen01 kernel: ------------[ cut here ]------------
Dec 26 15:58:29 xen01 kernel: kernel BUG at arch/x86/xen/mmu.c:1860!
Dec 26 15:58:29 xen01 kernel: invalid opcode: 0000 [#1] SMP 
Dec 26 15:58:29 xen01 kernel: last sysfs file: /sys/block/dm-26/dev
Dec 26 15:58:29 xen01 kernel: CPU 0 
Dec 26 15:58:29 xen01 kernel: Modules linked in: ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp xt_physdev iptable_filter ip_tables x_tables bridge stp be2iscsi iscsi_tcp bnx2i cnic uio ipv6 cxgb3i cxgb3 mdio libiscsi_tcp libiscsi scsi_transport_iscsi loop dm_multipath scsi_dh video backlight output sbs sbshc power_meter hwmon battery acpi_memhotplug xen_acpi_memhotplug ac parport_pc lp parport sg tpm_tis tpm tpm_bios button i2c_i801 i2c_core iTCO_wdt e1000e shpchp pcspkr dm_snapshot dm_zero dm_mirror dm_region_hash dm_log dm_mod usb_storage ahci libata sd_mod scsi_mod raid1 ext3 jbd uhci_hcd ohci_hcd ehci_hcd [last unloaded: microcode]
Dec 26 15:58:29 xen01 kernel: Pid: 27998, comm: udevd Not tainted 2.6.32.27-0.xen.pvops.choon.centos5 #1 S3420GP
Dec 26 15:58:29 xen01 kernel: RIP: e030:[<ffffffff8100cb5b>]  [<ffffffff8100cb5b>] pin_pagetable_pfn+0x53/0x59
Dec 26 15:58:29 xen01 kernel: RSP: e02b:ffff88003bc3bdc8  EFLAGS: 00010282
Dec 26 15:58:29 xen01 kernel: RAX: 00000000ffffffea RBX: 0000000000017605 RCX: 00000000000000bb
Dec 26 15:58:29 xen01 kernel: RDX: 00000000deadbeef RSI: 00000000deadbeef RDI: 00000000deadbeef
Dec 26 15:58:29 xen01 kernel: RBP: ffff88003bc3bde8 R08: 0000000000000028 R09: ffff880000000000
Dec 26 15:58:29 xen01 kernel: R10: 00000000deadbeef R11: 00007fdb5665e600 R12: 0000000000000003
Dec 26 15:58:30 xen01 kernel: R13: 0000000000017605 R14: ffff880012ee0780 R15: 00007fdb56224268
Dec 26 15:58:30 xen01 kernel: FS:  00007fdb56fed710(0000) GS:ffff88002804f000(0000) knlGS:0000000000000000
Dec 26 15:58:30 xen01 kernel: CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
Dec 26 15:58:30 xen01 kernel: CR2: 00007fdb56224268 CR3: 000000003addb000 CR4: 0000000000002660
Dec 26 15:58:30 xen01 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Dec 26 15:58:30 xen01 kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Dec 26 15:58:30 xen01 kernel: Process udevd (pid: 27998, threadinfo ffff88003bc3a000, task ffff880012ee0780)
Dec 26 15:58:30 xen01 kernel: Stack:
Dec 26 15:58:30 xen01 kernel:  0000000000000000 0000000000424121 000000013f00ae20 0000000000017605
Dec 26 15:58:30 xen01 kernel: <0> ffff88003bc3be08 ffffffff8100e07c ffff88003a3c2580 ffff880034bb6588
Dec 26 15:58:30 xen01 kernel: <0> ffff88003bc3be18 ffffffff8100e0af ffff88003bc3be58 ffffffff810a402f
Dec 26 15:58:31 xen01 kernel: Call Trace:
Dec 26 15:58:31 xen01 kernel:  [<ffffffff8100e07c>] xen_alloc_ptpage+0x64/0x69
Dec 26 15:58:31 xen01 kernel:  [<ffffffff8100e0af>] xen_alloc_pte+0xe/0x10
Dec 26 15:58:31 xen01 kernel:  [<ffffffff810a402f>] __pte_alloc+0x70/0xce
Dec 26 15:58:31 xen01 kernel:  [<ffffffff810a41cd>] handle_mm_fault+0x140/0x8b9
Dec 26 15:58:31 xen01 kernel:  [<ffffffff810d2ecc>] ? d_kill+0x3a/0x42
Dec 26 15:58:31 xen01 kernel:  [<ffffffff810c4cd1>] ? __fput+0x1cb/0x1da
Dec 26 15:58:31 xen01 kernel:  [<ffffffff8131be4d>] do_page_fault+0x252/0x2e2
Dec 26 15:58:31 xen01 kernel:  [<ffffffff81319dd5>] page_fault+0x25/0x30
Dec 26 15:58:31 xen01 kernel: Code: 48 b8 ff ff ff ff ff ff ff 7f 48 21 c2 48 89 55 e8 48 8d 7d e0 be 01 00 00 00 31 d2 41 ba f0 7f 00 00 e8 e9 c7 ff ff 85 c0 74 04 <0f> 0b eb fe c9 c3 55 40 f6 c7 01 48 89 e5 53 48 89 fb 74 5b 48 
Dec 26 15:58:31 xen01 kernel: RIP  [<ffffffff8100cb5b>] pin_pagetable_pfn+0x53/0x59
Dec 26 15:58:31 xen01 kernel:  RSP <ffff88003bc3bdc8>
Dec 26 15:58:31 xen01 kernel: ---[ end trace 540bcf6f0170242d ]---

Triggered BUG() in line 1860:

static void pin_pagetable_pfn(unsigned cmd, unsigned long pfn)
{
        struct mmuext_op op;
        op.cmd = cmd;
        op.arg1.mfn = pfn_to_mfn(pfn);
           if (HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF))
                   BUG(); <<THIS ONE?
}

Any idea?

Thanks.

Kindest regards,
Giam Teck Choon


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