[Xen-bugs] [Bug 1338] New: Unable to handle kernel paging request with NFS (domU client, dom0 server)

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1338

           Summary: Unable to handle kernel paging request with NFS (domU
                    client, dom0 server)
           Product: Xen
           Version: unstable
          Platform: x86-64
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Unspecified
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: samuel.maftoul@xxxxxxxxxxxxxxx


I'm using xen-3.2 (I'm using xen-utils-3.2 package on a ubuntu).

# uname -r 
2.6.24-19-xen
# cat /etc/issue
Ubuntu 8.04.1 \n \l

Here is the logs for kern.log:
------
ug 28 11:31:07 ubuntu kernel: [6276051.056087] Unable to handle kernel paging
request at ffff8803a9df3008 RIP: 
Aug 28 11:31:07 ubuntu kernel: [6276051.056115]  [iov_iter_advance+0x66/0x80]
iov_iter_advance+0x66/0x80
Aug 28 11:31:07 ubuntu kernel: [6276051.056196] PGD 3a1b067 PUD 562a067 PMD
5779067 PTE 0
Aug 28 11:31:07 ubuntu kernel: [6276051.056239] Oops: 0000 [5] SMP 
Aug 28 11:31:07 ubuntu kernel: [6276051.056272] CPU 1 
Aug 28 11:31:07 ubuntu kernel: [6276051.056299] Modules linked in: nfsd lockd
nfs_acl auth_rpcgss sunrpc exportfs nls_cp437 isofs tun xt_physdev bridge ipv6
iptable_filter ip_tables x_tables parport_pc lp parport loop af_packet joydev
container iTCO_wdt iTCO_vendor_support serio_raw psmouse button 8250_pnp 8250
serial_core i5000_edac evdev shpchp pci_hotplug pcspkr edac_core sr_mod cdrom
usb_storage ext3 jbd mbcache usbhid hid libusual sg sd_mod ata_generic
pata_acpi ata_piix ehci_hcd uhci_hcd e1000 libata scsi_mod usbcore thermal
processor fan fuse
Aug 28 11:31:07 ubuntu kernel: [6276051.056713] Pid: 26954, comm: nfsd Tainted:
G      D 2.6.24-18-xen #1
Aug 28 11:31:07 ubuntu kernel: [6276051.056744] RIP:
e030:[iov_iter_advance+0x66/0x80]  [iov_iter_advance+0x66/0x80]
iov_iter_advance+0x66/0x80
Aug 28 11:31:07 ubuntu kernel: [6276051.056800] RSP: e02b:ffff880328a9d8e8 
EFLAGS: 00010246
Aug 28 11:31:07 ubuntu kernel: [6276051.056829] RAX: 0000000000000000 RBX:
0000000000001000 RCX: 0000000000000000
Aug 28 11:31:07 ubuntu kernel: [6276051.056877] RDX: 0000000000000000 RSI:
0000000000001000 RDI: ffff880328a9d980
Aug 28 11:31:07 ubuntu kernel: [6276051.056925] RBP: 0000000000001000 R08:
0000000000000000 R09: 0000000000000000
Aug 28 11:31:07 ubuntu kernel: [6276051.056973] R10: ffff8803a9df3000 R11:
0000000000000000 R12: 00000000000bf000
Aug 28 11:31:07 ubuntu kernel: [6276051.057021] R13: 0000000000001000 R14:
ffff88037b159b08 R15: 0000000000000000
Aug 28 11:31:07 ubuntu kernel: [6276051.057071] FS:  00007f25df2746e0(0000)
GS:ffffffff805c6080(0000) knlGS:0000000000000000
Aug 28 11:31:07 ubuntu kernel: [6276051.057121] CS:  e033 DS: 0000 ES: 0000
Aug 28 11:31:07 ubuntu kernel: [6276051.057148] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Aug 28 11:31:07 ubuntu kernel: [6276051.057197] DR3: 0000000000000000 DR6:
00000000ffff0ff0 DR7: 0000000000000400
Aug 28 11:31:07 ubuntu kernel: [6276051.057245] Process nfsd (pid: 26954,
threadinfo ffff880328a9c000, task ffff8803e766e800)
Aug 28 11:31:07 ubuntu kernel: [6276051.057295] Stack:  ffffffff80273f9e
ffff88010697f087 0000000000000001 0000000101abaf80
Aug 28 11:31:07 ubuntu kernel: [6276051.058964]  ffff880328a9db90
0000000000080000 ffff880328a9db10 ffff8803e6356200
Aug 28 11:31:07 ubuntu kernel: [6276051.059031]  ffff88037b159b08
ffffffff88152ac0 ffff88037b1599f8 000000000003f000
Aug 28 11:31:07 ubuntu kernel: [6276051.059074] Call Trace:
Aug 28 11:31:07 ubuntu kernel: [6276051.059119] 
[generic_file_buffered_write+0x1de/0x6e0]
generic_file_buffered_write+0x1de/0x6e0
Aug 28 11:31:07 ubuntu kernel: [6276051.059158]  [current_fs_time+0x1e/0x30]
current_fs_time+0x1e/0x30
Aug 28 11:31:07 ubuntu kernel: [6276051.059192] 
[__generic_file_aio_write_nolock+0x24f/0x400]
__generic_file_aio_write_nolock+0x24f/0x400
Aug 28 11:31:07 ubuntu kernel: [6276051.059244] 
[__mutex_lock_slowpath+0x8d/0xe0] __mutex_lock_slowpath+0x8d/0xe0
Aug 28 11:31:07 ubuntu kernel: [6276051.059279] 
[ext3:generic_file_aio_write+0x64/0x4e0] generic_file_aio_write+0x64/0xd0
Aug 28 11:31:07 ubuntu kernel: [6276051.059320] 
[ext3:ext3_file_write+0x23/0xc0] :ext3:ext3_file_write+0x23/0xc0
Aug 28 11:31:07 ubuntu kernel: [6276051.059357] 
[ext3:ext3_file_write+0x0/0xc0] :ext3:ext3_file_write+0x0/0xc0
Aug 28 11:31:07 ubuntu kernel: [6276051.059391] 
[do_sync_readv_writev+0xcb/0x110] do_sync_readv_writev+0xcb/0x110
Aug 28 11:31:07 ubuntu kernel: [6276051.059426]  [<ffffffff8024cc20>]
autoremove_wake_function+0x0/0x30
Aug 28 11:31:07 ubuntu kernel: [6276051.059462]  [ext3:__kmalloc+0x158/0x880]
__kmalloc+0x158/0x160
Aug 28 11:31:07 ubuntu kernel: [6276051.059495]  [do_readv_writev+0xfd/0x230]
do_readv_writev+0xfd/0x230
Aug 28 11:31:07 ubuntu kernel: [6276051.059538]  [<ffffffff8831a9f2>]
:nfsd:nfsd_setuser+0x82/0x1f0
Aug 28 11:31:07 ubuntu kernel: [6276051.059577]  [<ffffffff88312f6c>]
:nfsd:nfsd_setuser_and_check_port+0x5c/0x70
Aug 28 11:31:07 ubuntu kernel: [6276051.059635]  [<ffffffff88314790>]
:nfsd:nfsd_vfs_write+0xf0/0x3d0
Aug 28 11:31:07 ubuntu kernel: [6276051.059668]  [__dentry_open+0x1a7/0x200]
__dentry_open+0x1a7/0x200
Aug 28 11:31:07 ubuntu kernel: [6276051.059707]  [<ffffffff88314fbc>]
:nfsd:nfsd_open+0x12c/0x1e0
Aug 28 11:31:07 ubuntu kernel: [6276051.059746]  [<ffffffff8831531d>]
:nfsd:nfsd_write+0x10d/0x120
Aug 28 11:31:07 ubuntu kernel: [6276051.059787]  [<ffffffff8831d83b>]
:nfsd:nfsd3_proc_write+0x10b/0x160
Aug 28 11:31:07 ubuntu kernel: [6276051.059828]  [<ffffffff88310271>]
:nfsd:nfsd_dispatch+0xb1/0x240
Aug 28 11:31:07 ubuntu kernel: [6276051.059878]  [<ffffffff882beccf>]
:sunrpc:svc_process+0x48f/0x7f0
Aug 28 11:31:07 ubuntu kernel: [6276051.059912]  [<ffffffff8022b600>]
default_wake_function+0x0/0x10
Aug 28 11:31:07 ubuntu kernel: [6276051.059944]  [__down_read+0x12/0xf7]
__down_read+0x12/0xf7
Aug 28 11:31:07 ubuntu kernel: [6276051.059981]  [<ffffffff88310810>]
:nfsd:nfsd+0x0/0x2e0
Aug 28 11:31:07 ubuntu kernel: [6276051.060017]  [<ffffffff8831099f>]
:nfsd:nfsd+0x18f/0x2e0
Aug 28 11:31:07 ubuntu kernel: [6276051.060051]  [child_rip+0xa/0x12]
child_rip+0xa/0x12
Aug 28 11:31:07 ubuntu kernel: [6276051.060088]  [<ffffffff88310810>]
:nfsd:nfsd+0x0/0x2e0
Aug 28 11:31:07 ubuntu kernel: [6276051.060128]  [<ffffffff88310810>]
:nfsd:nfsd+0x0/0x2e0
Aug 28 11:31:07 ubuntu kernel: [6276051.060159]  [child_rip+0x0/0x12]
child_rip+0x0/0x12
Aug 28 11:31:07 ubuntu kernel: [6276051.060189] 
Aug 28 11:31:07 ubuntu kernel: [6276051.060211] 
Aug 28 11:31:07 ubuntu kernel: [6276051.060212] Code: 49 8b 52 08 49 89 d3 eb
c4 4c 89 17 4c 89 4f 10 eb 99 0f 1f 
Aug 28 11:31:07 ubuntu kernel: [6276051.060358] RIP 
[iov_iter_advance+0x66/0x80] iov_iter_advance+0x66/0x80
Aug 28 11:31:07 ubuntu kernel: [6276051.060393]  RSP <ffff880328a9d8e8>
Aug 28 11:31:07 ubuntu kernel: [6276051.060419] CR2: ffff8803a9df3008
Aug 28 11:31:07 ubuntu kernel: [6276051.061021] ---[ end trace eaf2bb987332fd9a
]---
------

I got this while doing a "cp -pa a_dir a_dir.bak" on a domU, the nfs server was
on dom0. I copied some files but it stopped copying during the process.
The network connection was still working (I was logged with ssh on both dom0
and domU).

The hardware is a supermicro superserver 6015T-T/INF


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