Hi
I use xen 4.0.1 and 2.6.32.23-170 by myoung, and create about 30 VMs in hypervisor
When I try to migrate them randomly in the same time , I got the following kernel message or reboot in some machines
Jan 26 06:27:23 nc-11 kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
Jan 26 06:27:23 nc-11 kernel: IP: [<ffffffff811efbc3>] inode_has_perm+0x65/0x90
Jan 26 06:27:23 nc-11 kernel: PGD 14886067 PUD 20c85067 PMD 0
Jan 26 06:27:23 nc-11 kernel: Oops: 0000 [#6] SMP
Jan 26 06:27:23 nc-11 kernel: last sysfs file: /sys/devices/system/cpu/cpu7/cache/index2/shared_cpu_map
Jan 26 06:27:23 nc-11 kernel: CPU 3
Jan 26 06:27:23 nc-11 kernel: Modules linked in: xt_mac xt_physdev tun ceph libceph libcrc32c blktap fuse xt_temac 8021q garp ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat bridge stp llc sunrpc ipv6 xen_netback xen_blkback blkback_pagemap xen_gntdev xen_evtchn xenfs dcdbas bnx2 iTCO_wdt power_meter iTCO_vendor_support joydev usb_storage [last unloaded: scsi_wait_scan]
Jan 26 06:27:23 nc-11 kernel: Pid: 5333, comm: ls Tainted: G D 2.6.32.23-170.Elaster.xendom0.fc12.x86_64 #1 PowerEdge R210
Jan 26 06:27:23 nc-11 kernel: RIP: e030:[<ffffffff811efbc3>] [<ffffffff811efbc3>] inode_has_perm+0x65/0x90
Jan 26 06:27:23 nc-11 kernel: RSP: e02b:ffff8800222ebd08 EFLAGS: 00010282
Jan 26 06:27:23 nc-11 kernel: RAX: ffff880003210d60 RBX: ffff880033f92cc0 RCX: ffff8800222ebda8
Jan 26 06:27:23 nc-11 kernel: RDX: 0000000000000010 RSI: ffff880068045d48 RDI: ffff88006ee560c0
Jan 26 06:27:23 nc-11 kernel: RBP: ffff8800222ebd98 R08: ffff8800222ebda8 R09: 0000000000000001
Jan 26 06:27:23 nc-11 kernel: R10: 0000000000000000 R11: 0000000000000000 R12: ffff8800b93eb300
Jan 26 06:27:23 nc-11 kernel: R13: ffff880068045d48 R14: 00007fff0de41f00 R15: 0000000000eea690
Jan 26 06:27:23 nc-11 kernel: FS: 00007f9ef2cff7a0(0000) GS:ffff88000c6be000(0000) knlGS:0000000000000000
Jan 26 06:27:23 nc-11 kernel: CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b
Jan 26 06:27:23 nc-11 kernel: CR2: 0000000000000020 CR3: 00000000565b4000 CR4: 0000000000002660
Jan 26 06:27:23 nc-11 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Jan 26 06:27:23 nc-11 kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Jan 26 06:27:23 nc-11 kernel: Process ls (pid: 5333, threadinfo ffff8800222ea000, task ffff88004587aea0)
Jan 26 06:27:23 nc-11 kernel: Stack:
Jan 26 06:27:23 nc-11 kernel: 0000000000100000 0000000000000000 ffffffff8100ef91 ffff8800222ebda8
Jan 26 06:27:23 nc-11 kernel: <0> ffffffff8100f6c2 0000000000100000 0000000000000001 0000000000000000
Jan 26 06:27:23 nc-11 kernel: <0> 0000000000000000 ffffea0002870200 ffffea000287f700 0000000000000000
Jan 26 06:27:23 nc-11 kernel: Call Trace:
Jan 26 06:27:23 nc-11 kernel: [<ffffffff8100ef91>] ? xen_force_evtchn_callback+0xd/0xf
Jan 26 06:27:23 nc-11 kernel: [<ffffffff8100f6c2>] ? check_events+0x12/0x20
Jan 26 06:27:23 nc-11 kernel: [<ffffffff8100f6af>] ? xen_restore_fl_direct_end+0x0/0x1
Jan 26 06:27:23 nc-11 kernel: [<ffffffff8110ef42>] ? kmem_cache_free+0x7e/0xb4
Jan 26 06:27:23 nc-11 kernel: [<ffffffff811f0030>] dentry_has_perm+0x5a/0x70
Jan 26 06:27:23 nc-11 kernel: [<ffffffff811f00c6>] selinux_inode_getattr+0x2c/0x2e
Jan 26 06:27:23 nc-11 kernel: [<ffffffff811e9225>] security_inode_getattr+0x25/0x27
Jan 26 06:27:23 nc-11 kernel: [<ffffffff81121972>] vfs_getattr+0x25/0x66
Jan 26 06:27:23 nc-11 kernel: [<ffffffff8112d311>] ? filldir+0x0/0xc4
Jan 26 06:27:23 nc-11 kernel: [<ffffffff811219fe>] vfs_fstatat+0x4b/0x62
Jan 26 06:27:23 nc-11 kernel: [<ffffffff81121a70>] vfs_lstat+0x1e/0x20
Jan 26 06:27:23 nc-11 kernel: [<ffffffff81121a91>] sys_newlstat+0x1f/0x3d
Jan 26 06:27:23 nc-11 kernel: [<ffffffff8145f495>] ? do_page_fault+0x2c2/0x2f2
Jan 26 06:27:23 nc-11 kernel: [<ffffffff810aa585>] ? audit_syscall_entry+0x11e/0x14a
Jan 26 06:27:23 nc-11 kernel: [<ffffffff81012d32>] system_call_fastpath+0x16/0x1b
Jan 26 06:27:23 nc-11 kernel: Code: 8b 96 30 02 00 00 44 8b 48 04 75 1f 4c 8d 85 70 ff ff ff b9 20 00 00 00 44 89 d8 4c 89 c7 f3 ab c6 85 70 ff ff ff 01 48 89 75 90 <41> 0f b7 42 20 41 8b 72 1c 89 d1 44 89 cf 89 c2 e8 3a e4 ff ff
Jan 26 06:27:23 nc-11 kernel: RIP [<ffffffff811efbc3>] inode_has_perm+0x65/0x90
Jan 26 06:27:23 nc-11 kernel: RSP <ffff8800222ebd08>
Jan 26 06:27:23 nc-11 kernel: CR2: 0000000000000020
Jan 26 06:27:23 nc-11 kernel: ---[ end trace b4379c3d3e1ecb00 ]---
It’s a bug of kernel or xen or anything?
Thanks
