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https://bugzilla.novell.com/show_bug.cgi?id=685276

https://bugzilla.novell.com/show_bug.cgi?id=685276#c0


           Summary: Machine crashes and don't responde any commands
    Classification: openSUSE
           Product: openSUSE 11.4
           Version: Factory
          Platform: x86-64
        OS/Version: openSUSE 11.4
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: Xen
        AssignedTo: jdouglas@xxxxxxxxxx
        ReportedBy: beto.rvs@xxxxxxxxx
         QAContact: qa@xxxxxxx
          Found By: ---
           Blocker: ---


User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.15)
Gecko/20110303 Ubuntu/10.10 (maverick) Firefox/3.6.15

[273411.336945] general protection fault: 0000 [#1] SMP 
[273411.336961] last sysfs file: /sys/devices/xen-backend/vif-137-0/uevent
[273411.336966] CPU 3 
[273411.336968] Modules linked in: st xt_mac nfs lockd fscache nfs_acl
auth_rpcgss sunrpc tun ip6table_filter ip6_tables usbbk gntdev netbk blkbk
blkback_pagemap blktap xenbus_be evtchn edd bridge 8021q garp stp llc bonding
arptable_filter arp_tables xt_esp ipt_ah xt_physdev xt_multiport xt_tcpudp
nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack iptable_filter ip_tables
x_tables sr_mod 8250_pnp usb_storage uas joydev i7core_edac bnx2 dcdbas
edac_core domctl sg ses enclosure pcspkr iTCO_wdt button iTCO_vendor_support
ghes 8250 serial_core power_meter hed usbhid hid linear uhci_hcd ehci_hcd
usbcore dm_snapshot dm_mod xenblk cdrom xennet fan processor thermal
thermal_sys hwmon megaraid_sas
[273411.337048] 
[273411.337054] Pid: 18798, comm: tapdisk Not tainted 2.6.37.1-1.2-xen #1
0N582M/PowerEdge M610
[273411.337059] RIP: e030:[<ffffffffa0606277>]  [<ffffffffa0606277>]
blktap_clear_pte+0xa7/0x320 [blktap]
[273411.337073] RSP: e02b:ffff88015fe99c98  EFLAGS: 00010246
[273411.337077] RAX: 000000000000dead RBX: 0408438348000000 RCX:
0000000000000000
[273411.337086] RDX: 0000000000000000 RSI: 00007f48527b2000 RDI:
0000000000000000
[273411.337091] RBP: ffff880723a57348 R08: ffff88098945b080 R09:
0000000000000000
[273411.337095] R10: 000000000000dead R11: 0000000000000000 R12:
ffff880165c87d90
[273411.337100] R13: ffff880165c87d90 R14: ffff880195098c00 R15:
00007f4852800000
[273411.337110] FS:  00007f4852913700(0000) GS:ffff880ba04f6000(0000)
knlGS:0000000000000000
[273411.337116] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
[273411.337120] CR2: 00007fe7ec00ef30 CR3: 0000000989409000 CR4:
0000000000002660
[273411.337125] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[273411.337130] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[273411.337136] Process tapdisk (pid: 18798, threadinfo ffff88015fe98000, task
ffff8801618fc240)
[273411.337141] Stack:
[273411.337144]  ffff880b760c4080 ffffffff8003b9eb ffff880b802b5e98
0000000080114e4a
[273411.337151]  0000000000011210 0000000000000001 ffff88015fe99cf8
ffff880b5323b108
[273411.337158]  00007f48527b2000 ffff880ba04fb5c0 ffff880165c87d90
ffff88015fe99e70
[273411.337165] Call Trace:
[273411.337197]  [<ffffffff800f645a>] zap_pte_range+0x63a/0x700
[273411.337209]  [<ffffffff800f6786>] unmap_page_range+0x266/0x370
[273411.337217]  [<ffffffff800f7141>] unmap_vmas+0x151/0x210
[273411.337225]  [<ffffffff800fc46a>] unmap_region+0xda/0x190
[273411.337233]  [<ffffffff800fd774>] do_munmap+0x1d4/0x2c0
[273411.337241]  [<ffffffff800fe93d>] sys_munmap+0x4d/0x80
[273411.337251]  [<ffffffff80007448>] system_call_fastpath+0x16/0x1b
[273411.337262]  [<00007f4851a7d3b7>] 0x7f4851a7d3b7
[273411.337267] Code: 14 50 48 98 48 8b 04 c7 29 d3 89 da 89 c3 48 c1 e8 10 83
e3 1f 41 89 c2 8d 3c 9b 8d 1c 7b 8d 14 13 4a 8b 1c d5 40 1b 62 a0 89 d7 <4c> 8b
34 fb 48 8b 3d 9e 6c 34 e0 f0 41 80 66 01 fb 49 8b 98 98 
[273411.337307] RIP  [<ffffffffa0606277>] blktap_clear_pte+0xa7/0x320 [blktap]
[273411.337315]  RSP <ffff88015fe99c98>
[273411.449029] ---[ end trace ee79595f6d977d18 ]---
[273416.737140] device tap-tec7350.0 entered promiscuous mode
[273416.737208] virtbr: port 9(tap-tec7350.0) entering forwarding state
[273416.737226] virtbr: port 9(tap-tec7350.0) entering forwarding state
[273416.836880] vif168.0 renamed to tec7350.0 by ip [31616]
[273416.917711] device tec7350.0 entered promiscuous mode
[273416.924730] virtbr: port 10(tec7350.0) entering forwarding state
[273416.924762] virtbr: port 10(tec7350.0) entering forwarding state
[273427.228937] tap-tec7350.0: no IPv6 routers present
[273427.580043] tec7350.0: no IPv6 routers present
[273473.696493] virtbr: port 9(tap-tec7350.0) entering forwarding state
[273473.756188] device tap-tec7350.0 left promiscuous mode
[273473.756207] virtbr: port 9(tap-tec7350.0) entering disabled state
[273474.598715] virtbr: port 10(tec7350.0) entering forwarding state
[273474.620281] virtbr: port 10(tec7350.0) entering disabled state
[273671.079872] virtbr: port 36(tec7348.0) entering forwarding state
[273671.124188] virtbr: port 36(tec7348.0) entering disabled state
[273672.565099] virtbr: port 35(tap-tec7348.0) entering forwarding state
[273672.608208] device tap-tec7348.0 left promiscuous mode
[273672.608224] virtbr: port 35(tap-tec7348.0) entering disabled state
[273678.656967] device tap-tec7348.0 entered promiscuous mode
[273678.657071] virtbr: port 9(tap-tec7348.0) entering forwarding state
[273678.657087] virtbr: port 9(tap-tec7348.0) entering forwarding state
[273678.788354] vif169.0 renamed to tec7348.0 by ip [2152]
[273678.874670] device tec7348.0 entered promiscuous mode
[273678.879232] virtbr: port 10(tec7348.0) entering forwarding state
[273678.879262] virtbr: port 10(tec7348.0) entering forwarding state
[273689.196022] tap-tec7348.0: no IPv6 routers present
[273689.884028] tec7348.0: no IPv6 routers present
[273714.750569] virtbr: port 9(tap-tec7348.0) entering forwarding state
[273714.784189] device tap-tec7348.0 left promiscuous mode
[273714.784206] virtbr: port 9(tap-tec7348.0) entering disabled state
[273715.492106] virtbr: port 10(tec7348.0) entering forwarding state
[273715.512182] virtbr: port 10(tec7348.0) entering disabled state
[275053.000282] virtbr: port 85(tec7282.0) entering forwarding state
[275053.020396] virtbr: port 85(tec7282.0) entering disabled state
[275056.393867] device tap-tec7282.0 entered promiscuous mode
[275056.394015] virtbr: port 9(tap-tec7282.0) entering forwarding state
[275056.394015] virtbr: port 9(tap-tec7282.0) entering forwarding state
[275056.508614] vif170.0 renamed to tec7282.0 by ip [8135]
[275056.573149] device tec7282.0 entered promiscuous mode
[275056.577493] virtbr: port 10(tec7282.0) entering forwarding state
[275056.577524] virtbr: port 10(tec7282.0) entering forwarding state
[275066.900024] tap-tec7282.0: no IPv6 routers present
[275067.100069] tec7282.0: no IPv6 routers present
[275092.476831] virtbr: port 9(tap-tec7282.0) entering forwarding state
[275092.512158] device tap-tec7282.0 left promiscuous mode
[275092.512176] virtbr: port 9(tap-tec7282.0) entering disabled state
[275093.165007] virtbr: port 10(tec7282.0) entering forwarding state
[275093.176175] virtbr: port 10(tec7282.0) entering disabled state


Reproducible: Sometimes

Steps to Reproduce:
1. Start more than 40 VM
2. Reboot all VM after 3 hours
3. 
Actual Results:  
Need configure a iptables for any VM.

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