Re: [Xen-devel] Virtio on Xen

["Peter X. Gao" <peterxianggao@xxxxxxxxx>]

Thanks for your reply. I am now using virtio-net and it seems working. However, Intel DPDK also requires hugepage. When a DPDK application is initiating hugepage, I got the following error. Do I need to config something in Xen to support hugepage?

[    0.000000] Initializing cgroup subsys cpuset

[    0.000000] Initializing cgroup subsys cpu

[    0.000000] Linux version 3.2.0-58-generic (buildd@allspice) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #88-Ubuntu SMP Tue Dec 3 17:37:58 UTC 2013 (Ubuntu 3.2.0-58.88-generic 3.2.53)

[    0.000000] Command line: root=/dev/xvda2 ro root=/dev/xvda2 ro ip=:127.0.255.255::::eth0:dhcp iommu=soft

[    0.000000] KERNEL supported cpus:

[    0.000000]   Intel GenuineIntel

[    0.000000]   AMD AuthenticAMD

[    0.000000]   Centaur CentaurHauls

[    0.000000] ACPI in unprivileged domain disabled

[    0.000000] Released 0 pages of unused memory

[    0.000000] Set 0 page(s) to 1-1 mapping

[    0.000000] BIOS-provided physical RAM map:

[    0.000000]  Xen: 0000000000000000 - 00000000000a0000 (usable)

[    0.000000]  Xen: 00000000000a0000 - 0000000000100000 (reserved)

[    0.000000]  Xen: 0000000000100000 - 0000000100800000 (usable)

[    0.000000] NX (Execute Disable) protection: active

[    0.000000] DMI not present or invalid.

[    0.000000] No AGP bridge found

[    0.000000] last_pfn = 0x100800 max_arch_pfn = 0x400000000

[    0.000000] last_pfn = 0x100000 max_arch_pfn = 0x400000000

[    0.000000] init_memory_mapping: 0000000000000000-0000000100000000

[    0.000000] init_memory_mapping: 0000000100000000-0000000100800000

[    0.000000] RAMDISK: 02060000 - 045e3000

[    0.000000] NUMA turned off

[    0.000000] Faking a node at 0000000000000000-0000000100800000

[    0.000000] Initmem setup node 0 0000000000000000-0000000100800000

[    0.000000]   NODE_DATA [00000000ffff5000 - 00000000ffff9fff]

[    0.000000] Zone PFN ranges:

[    0.000000]   DMA      0x00000010 -> 0x00001000

[    0.000000]   DMA32    0x00001000 -> 0x00100000

[    0.000000]   Normal   0x00100000 -> 0x00100800

[    0.000000] Movable zone start PFN for each node

[    0.000000] early_node_map[2] active PFN ranges

[    0.000000]     0: 0x00000010 -> 0x000000a0

[    0.000000]     0: 0x00000100 -> 0x00100800

[    0.000000] SFI: Simple Firmware Interface v0.81 http://simplefirmware.org

[    0.000000] SMP: Allowing 8 CPUs, 0 hotplug CPUs

[    0.000000] No local APIC present

[    0.000000] APIC: disable apic facility

[    0.000000] APIC: switched to apic NOOP

[    0.000000] PM: Registered nosave memory: 00000000000a0000 - 0000000000100000

[    0.000000] PCI: Warning: Cannot find a gap in the 32bit address range

[    0.000000] PCI: Unassigned devices with 32bit resource registers may break!

[    0.000000] Allocating PCI resources starting at 100900000 (gap: 100900000:400000)

[    0.000000] Booting paravirtualized kernel on Xen

[    0.000000] Xen version: 4.2.1 (preserve-AD)

[    0.000000] setup_percpu: NR_CPUS:256 nr_cpumask_bits:256 nr_cpu_ids:8 nr_node_ids:1

[    0.000000] PERCPU: Embedded 28 pages/cpu @ffff8800ffc00000 s83136 r8192 d23360 u262144

[    0.000000] Built 1 zonelists in Node order, mobility grouping on.  Total pages: 1032084

[    0.000000] Policy zone: Normal

[    0.000000] Kernel command line: root=/dev/xvda2 ro root=/dev/xvda2 ro ip=:127.0.255.255::::eth0:dhcp iommu=soft

[    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)

[    0.000000] Placing 64MB software IO TLB between ffff8800f7400000 - ffff8800fb400000

[    0.000000] software IO TLB at phys 0xf7400000 - 0xfb400000

[    0.000000] Memory: 3988436k/4202496k available (6588k kernel code, 448k absent, 213612k reserved, 6617k data, 924k init)

[    0.000000] SLUB: Genslabs=15, HWalign=64, Order=0-3, MinObjects=0, CPUs=8, Nodes=1

[    0.000000] Hierarchical RCU implementation.

[    0.000000] RCU dyntick-idle grace-period acceleration is enabled.

[    0.000000] NR_IRQS:16640 nr_irqs:336 16

[    0.000000] Console: colour dummy device 80x25

[    0.000000] console [tty0] enabled

[    0.000000] console [hvc0] enabled

[    0.000000] allocated 34603008 bytes of page_cgroup

[    0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups

[    0.000000] installing Xen timer for CPU 0

[    0.000000] Detected 2793.098 MHz processor.

[    0.004000] Calibrating delay loop (skipped), value calculated using timer frequency.. 5586.19 BogoMIPS (lpj=11172392)

[    0.004000] pid_max: default: 32768 minimum: 301

[    0.004000] Security Framework initialized

[    0.004000] AppArmor: AppArmor initialized

[    0.004000] Yama: becoming mindful.

[    0.004000] Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes)

[    0.004000] Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)

[    0.004000] Mount-cache hash table entries: 256

[    0.004000] Initializing cgroup subsys cpuacct

[    0.004000] Initializing cgroup subsys memory

[    0.004000] Initializing cgroup subsys devices

[    0.004000] Initializing cgroup subsys freezer

[    0.004000] Initializing cgroup subsys blkio

[    0.004000] Initializing cgroup subsys perf_event

[    0.004000] CPU: Physical Processor ID: 0

[    0.004000] CPU: Processor Core ID: 0

[    0.004000] SMP alternatives: switching to UP code

[    0.031040] ftrace: allocating 26602 entries in 105 pages

[    0.032055] cpu 0 spinlock event irq 17

[    0.032115] Performance Events: unsupported p6 CPU model 26 no PMU driver, software events only.

[    0.032244] NMI watchdog disabled (cpu0): hardware events not enabled

[    0.032350] installing Xen timer for CPU 1

[    0.032363] cpu 1 spinlock event irq 23

[    0.032623] SMP alternatives: switching to SMP code

[    0.057953] NMI watchdog disabled (cpu1): hardware events not enabled

[    0.058085] installing Xen timer for CPU 2

[    0.058103] cpu 2 spinlock event irq 29

[    0.058542] NMI watchdog disabled (cpu2): hardware events not enabled

[    0.058696] installing Xen timer for CPU 3

[    0.058724] cpu 3 spinlock event irq 35

[    0.059115] NMI watchdog disabled (cpu3): hardware events not enabled

[    0.059227] installing Xen timer for CPU 4

[    0.059246] cpu 4 spinlock event irq 41

[    0.059423] NMI watchdog disabled (cpu4): hardware events not enabled

[    0.059544] installing Xen timer for CPU 5

[    0.059562] cpu 5 spinlock event irq 47

[    0.059724] NMI watchdog disabled (cpu5): hardware events not enabled

[    0.059833] installing Xen timer for CPU 6

[    0.059852] cpu 6 spinlock event irq 53

[    0.060003] NMI watchdog disabled (cpu6): hardware events not enabled

[    0.060037] installing Xen timer for CPU 7

[    0.060056] cpu 7 spinlock event irq 59

[    0.060209] NMI watchdog disabled (cpu7): hardware events not enabled

[    0.060243] Brought up 8 CPUs

[    0.060494] devtmpfs: initialized

[    0.061531] EVM: security.selinux

[    0.061537] EVM: security.SMACK64

[    0.061542] EVM: security.capability

[    0.061711] Grant table initialized

[    0.061711] print_constraints: dummy: 

[    0.083057] RTC time: 165:165:165, date: 165/165/65

[    0.083093] NET: Registered protocol family 16

[    0.083159] Trying to unpack rootfs image as initramfs...

[    0.084665] PCI: setting up Xen PCI frontend stub

[    0.086003] bio: create slab <bio-0> at 0

[    0.086003] ACPI: Interpreter disabled.

[    0.086003] xen/balloon: Initialising balloon driver.

[    0.088136] xen-balloon: Initialising balloon driver.

[    0.088139] vgaarb: loaded

[    0.088184] i2c-core: driver [aat2870] using legacy suspend method

[    0.088192] i2c-core: driver [aat2870] using legacy resume method

[    0.088283] SCSI subsystem initialized

[    0.088341] usbcore: registered new interface driver usbfs

[    0.088341] usbcore: registered new interface driver hub

[    0.088341] usbcore: registered new device driver usb

[    0.088341] PCI: System does not support PCI

[    0.088341] PCI: System does not support PCI

[    0.088341] NetLabel: Initializing

[    0.088341] NetLabel:  domain hash size = 128

[    0.184026] NetLabel:  protocols = UNLABELED CIPSOv4

[    0.184051] NetLabel:  unlabeled traffic allowed by default

[    0.184159] Switching to clocksource xen

[    0.188203] Freeing initrd memory: 38412k freed

[    0.202280] AppArmor: AppArmor Filesystem Enabled

[    0.202308] pnp: PnP ACPI: disabled

[    0.205341] NET: Registered protocol family 2

[    0.205661] IP route cache hash table entries: 131072 (order: 8, 1048576 bytes)

[    0.207989] TCP established hash table entries: 524288 (order: 11, 8388608 bytes)

[    0.209497] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)

[    0.209644] TCP: Hash tables configured (established 524288 bind 65536)

[    0.209650] TCP reno registered

[    0.209674] UDP hash table entries: 2048 (order: 4, 65536 bytes)

[    0.209704] UDP-Lite hash table entries: 2048 (order: 4, 65536 bytes)

[    0.209817] NET: Registered protocol family 1

[    0.210139] platform rtc_cmos: registered platform RTC device (no PNP device found)

[    0.211002] audit: initializing netlink socket (disabled)

[    0.211015] type=2000 audit(1392055157.599:1): initialized

[    0.229178] HugeTLB registered 2 MB page size, pre-allocated 0 pages

[    0.230818] VFS: Disk quotas dquot_6.5.2

[    0.230873] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)

[    0.231462] fuse init (API version 7.17)

[    0.231605] msgmni has been set to 7864

[    0.232267] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)

[    0.232382] io scheduler noop registered

[    0.232417] io scheduler deadline registered

[    0.232449] io scheduler cfq registered (default)

[    0.232511] pci_hotplug: PCI Hot Plug PCI Core version: 0.5

[    0.232529] pciehp: PCI Express Hot Plug Controller Driver version: 0.4

[    0.233195] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled

[    0.437179] Linux agpgart interface v0.103

[    0.439329] brd: module loaded

[    0.440557] loop: module loaded

[    0.442439] blkfront device/vbd/51714 num-ring-pages 1 nr_ents 32.

[    0.445706] blkfront device/vbd/51713 num-ring-pages 1 nr_ents 32.

[    0.447233] blkfront: xvda2: flush diskcache: enabled

[    0.447810] Fixed MDIO Bus: probed

[    0.447856] tun: Universal TUN/TAP device driver, 1.6

[    0.447864] tun: (C) 1999-2004 Max Krasnyansky <maxk@xxxxxxxxxxxx>

[    0.447945] PPP generic driver version 2.4.2

[    0.448029] Initialising Xen virtual ethernet driver.

[    0.453923] blkfront: xvda1: flush diskcache: enabled

[    0.455000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver

[    0.455031] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver

[    0.455048] uhci_hcd: USB Universal Host Controller Interface driver

[    0.455100] usbcore: registered new interface driver libusual

[    0.455134] i8042: PNP: No PS/2 controller found. Probing ports directly.

[    1.455791] i8042: No controller found

[    1.456071] mousedev: PS/2 mouse device common for all mice

[    1.496241] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0

[    1.496489] rtc_cmos: probe of rtc_cmos failed with error -38

[    1.496624] device-mapper: uevent: version 1.0.3

...............

...............

...............

...............

[  135.957086] BUG: unable to handle kernel paging request at ffff8800f36c0960

[  135.957105] IP: [<ffffffff81008efe>] xen_set_pte_at+0x3e/0x210

[  135.957122] PGD 1c06067 PUD dd1067 PMD f6d067 PTE 80100000f36c0065

[  135.957134] Oops: 0003 [#1] SMP 

[  135.957141] CPU 0 

[  135.957144] Modules linked in: igb_uio(O) uio

[  135.957155] 

[  135.957160] Pid: 659, comm: helloworld Tainted: G           O 3.2.0-58-generic #88-Ubuntu  

[  135.957171] RIP: e030:[<ffffffff81008efe>]  [<ffffffff81008efe>] xen_set_pte_at+0x3e/0x210

[  135.957183] RSP: e02b:ffff8800037ddc88  EFLAGS: 00010297

[  135.957189] RAX: 0000000000000000 RBX: 800000008c6000e7 RCX: 800000008c6000e7

[  135.957197] RDX: 0000000000000000 RSI: 00007f4a65800000 RDI: ffff880003044980

[  135.957205] RBP: ffff8800037ddcd8 R08: 0000000000000000 R09: dead000000100100

[  135.957212] R10: dead000000200200 R11: 00007f4a64f7e02a R12: ffffea0003c48000

[  135.957220] R13: 800000008c6000e7 R14: ffff8800f36c0960 R15: 0000000000000001

[  135.957232] FS:  00007f4a656e8800(0000) GS:ffff8800ffc00000(0000) knlGS:0000000000000000

[  135.957241] CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b

[  135.957247] CR2: ffff8800f36c0960 CR3: 0000000002d08000 CR4: 0000000000002660

[  135.957255] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[  135.957263] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400

[  135.957271] Process helloworld (pid: 659, threadinfo ffff8800037dc000, task ffff8800034c1700)

[  135.957279] Stack:

[  135.957283]  00007f4a65800000 ffff880003044980 dead000000200200 dead000000100100

[  135.957297]  0000000000000000 0000000000000000 ffffea0003c48000 800000008c6000e7

[  135.957310]  ffff8800030449ec 0000000000000001 ffff8800037ddd68 ffffffff81158453

[  135.957322] Call Trace:

[  135.957333]  [<ffffffff81158453>] hugetlb_no_page+0x233/0x370

[  135.957342]  [<ffffffff8100640e>] ? xen_pud_val+0xe/0x10

[  135.957351]  [<ffffffff810053b5>] ? __raw_callee_save_xen_pud_val+0x11/0x1e

[  135.957361]  [<ffffffff8115883e>] hugetlb_fault+0x1fe/0x340

[  135.957370]  [<ffffffff81143e18>] ? vma_link+0x88/0xe0

[  135.957378]  [<ffffffff81140a3c>] handle_mm_fault+0x2ec/0x370

[  135.957391]  [<ffffffff816658be>] do_page_fault+0x17e/0x540

[  135.957399]  [<ffffffff81145af8>] ? do_mmap_pgoff+0x348/0x360

[  135.957408]  [<ffffffff81145bf1>] ? sys_mmap_pgoff+0xe1/0x230

[  135.957417]  [<ffffffff816624f5>] page_fault+0x25/0x30

[  135.957424] Code: e8 4c 89 75 f0 4c 89 7d f8 66 66 66 66 90 48 89 7d b8 48 89 75 b0 49 89 d6 48 89 cb 66 66 66 66 90 e8 77 5a 03 00 83 f8 01 74 75 <49> 89 1e 48 8b 5d d8 4c 8b 65 e0 4c 8b 6d e8 4c 8b 75 f0 4c 8b 

[  135.957507] RIP  [<ffffffff81008efe>] xen_set_pte_at+0x3e/0x210

[  135.957517]  RSP <ffff8800037ddc88>

[  135.957521] CR2: ffff8800f36c0960

[  135.957528] ---[ end trace f6a013072f2aee83 ]---

[  160.032062] BUG: soft lockup - CPU#0 stuck for 23s! [helloworld:659]

[  160.032129] Modules linked in: igb_uio(O) uio

[  160.032140] CPU 0 

[  160.032143] Modules linked in: igb_uio(O) uio

[  160.032153] 

[  160.032159] Pid: 659, comm: helloworld Tainted: G      D    O 3.2.0-58-generic #88-Ubuntu  

[  160.032170] RIP: e030:[<ffffffff810013aa>]  [<ffffffff810013aa>] hypercall_page+0x3aa/0x1000

[  160.032190] RSP: e02b:ffff8800037dd730  EFLAGS: 00000202

[  160.032197] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff810013aa

[  160.032204] RDX: 0000000000000000 RSI: ffff8800037dd748 RDI: 0000000000000003

[  160.032212] RBP: ffff8800037dd778 R08: ffff8800f7008000 R09: ffff8800f6c000a0

[  160.032220] R10: 0000000000007ff0 R11: 0000000000000202 R12: 0000000000000011

[  160.032227] R13: 0000000000000201 R14: ffff880003044901 R15: ffff880003044900

[  160.032239] FS:  00007f4a656e8800(0000) GS:ffff8800ffc00000(0000) knlGS:0000000000000000

[  160.032248] CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b

[  160.032255] CR2: ffff8800f36c0960 CR3: 0000000001c05000 CR4: 0000000000002660

[  160.032263] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[  160.032271] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400

[  160.032279] Process helloworld (pid: 659, threadinfo ffff8800037dc000, task ffff8800034c1700)

[  160.032287] Stack:

[  160.032291]  0000000000000011 00000000fffffffa ffffffff813adade ffff8800037dd764

[  160.032304]  ffffffff00000001 0000000000000000 00000004813ad17e ffff8800037dd778

[  160.032317]  ffff8800030449ec ffff8800037dd788 ffffffff813af5e0 ffff8800037dd7d8

[  160.032329] Call Trace:

[  160.032341]  [<ffffffff813adade>] ? xen_poll_irq_timeout+0x3e/0x50

[  160.032350]  [<ffffffff813af5e0>] xen_poll_irq+0x10/0x20

[  160.032360]  [<ffffffff81646686>] xen_spin_lock_slow+0x98/0xf4

[  160.032370]  [<ffffffff810124ba>] xen_spin_lock+0x4a/0x50

[  160.032381]  [<ffffffff81661d8e>] _raw_spin_lock+0xe/0x20

[  160.032390]  [<ffffffff81007d9a>] xen_exit_mmap+0x2a/0x60

[  160.032400]  [<ffffffff81146408>] exit_mmap+0x58/0x140

[  160.032408]  [<ffffffff8166275a>] ? error_exit+0x2a/0x60

[  160.032416]  [<ffffffff8166227c>] ? retint_restore_args+0x5/0x6

[  160.032425]  [<ffffffff8100132a>] ? hypercall_page+0x32a/0x1000

[  160.032433]  [<ffffffff8100132a>] ? hypercall_page+0x32a/0x1000

[  160.032442]  [<ffffffff8100132a>] ? hypercall_page+0x32a/0x1000

[  160.032452]  [<ffffffff81065e22>] mmput.part.16+0x42/0x130

[  160.032460]  [<ffffffff81065f39>] mmput+0x29/0x30

[  160.032470]  [<ffffffff8106c943>] exit_mm+0x113/0x130

[  160.032479]  [<ffffffff810e58c5>] ? taskstats_exit+0x45/0x240

[  160.032488]  [<ffffffff81662075>] ? _raw_spin_lock_irq+0x15/0x20

[  160.032496]  [<ffffffff8106cace>] do_exit+0x16e/0x450

[  160.032504]  [<ffffffff81662f20>] oops_end+0xb0/0xf0

[  160.032513]  [<ffffffff8164812f>] no_context+0x150/0x15d

[  160.032520]  [<ffffffff81648307>] __bad_area_nosemaphore+0x1cb/0x1ea

[  160.032529]  [<ffffffff816622ad>] ? restore_args+0x30/0x30

[  160.032537]  [<ffffffff8164795b>] ? pte_offset_kernel+0xe/0x37

[  160.032545]  [<ffffffff81648339>] bad_area_nosemaphore+0x13/0x15

[  160.032555]  [<ffffffff81665bab>] do_page_fault+0x46b/0x540

[  160.032564]  [<ffffffff8115c3f8>] ? mpol_shared_policy_init+0x48/0x160

[  160.032575]  [<ffffffff811667bd>] ? kmem_cache_alloc+0x11d/0x140

[  160.032588]  [<ffffffff8126d5fb>] ? hugetlbfs_alloc_inode+0x5b/0xa0

[  160.032597]  [<ffffffff816624f5>] page_fault+0x25/0x30

[  160.032605]  [<ffffffff81008efe>] ? xen_set_pte_at+0x3e/0x210

[  160.032613]  [<ffffffff81008ef9>] ? xen_set_pte_at+0x39/0x210

[  160.032622]  [<ffffffff81158453>] hugetlb_no_page+0x233/0x370

[  160.032630]  [<ffffffff8100640e>] ? xen_pud_val+0xe/0x10

[  160.032638]  [<ffffffff810053b5>] ? __raw_callee_save_xen_pud_val+0x11/0x1e

[  160.032648]  [<ffffffff8115883e>] hugetlb_fault+0x1fe/0x340

[  160.032656]  [<ffffffff81143e18>] ? vma_link+0x88/0xe0

[  160.032664]  [<ffffffff81140a3c>] handle_mm_fault+0x2ec/0x370

[  160.032673]  [<ffffffff816658be>] do_page_fault+0x17e/0x540

[  160.032681]  [<ffffffff81145af8>] ? do_mmap_pgoff+0x348/0x360

[  160.032689]  [<ffffffff81145bf1>] ? sys_mmap_pgoff+0xe1/0x230

[  160.032697]  [<ffffffff816624f5>] page_fault+0x25/0x30

[  160.032703] Code: cc 51 41 53 b8 1c 00 00 00 0f 05 41 5b 59 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 51 41 53 b8 1d 00 00 00 0f 05 <41> 5b 59 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 

[  160.032781] Call Trace:

[  160.032787]  [<ffffffff813adade>] ? xen_poll_irq_timeout+0x3e/0x50

[  160.032795]  [<ffffffff813af5e0>] xen_poll_irq+0x10/0x20

[  160.032803]  [<ffffffff81646686>] xen_spin_lock_slow+0x98/0xf4

[  160.032811]  [<ffffffff810124ba>] xen_spin_lock+0x4a/0x50

[  160.032818]  [<ffffffff81661d8e>] _raw_spin_lock+0xe/0x20

[  160.032826]  [<ffffffff81007d9a>] xen_exit_mmap+0x2a/0x60

[  160.032833]  [<ffffffff81146408>] exit_mmap+0x58/0x140

[  160.032841]  [<ffffffff8166275a>] ? error_exit+0x2a/0x60

[  160.032849]  [<ffffffff8166227c>] ? retint_restore_args+0x5/0x6

[  160.032857]  [<ffffffff8100132a>] ? hypercall_page+0x32a/0x1000

[  160.032866]  [<ffffffff8100132a>] ? hypercall_page+0x32a/0x1000

[  160.032874]  [<ffffffff8100132a>] ? hypercall_page+0x32a/0x1000

[  160.032882]  [<ffffffff81065e22>] mmput.part.16+0x42/0x130

[  160.032889]  [<ffffffff81065f39>] mmput+0x29/0x30

[  160.032896]  [<ffffffff8106c943>] exit_mm+0x113/0x130

[  160.032904]  [<ffffffff810e58c5>] ? taskstats_exit+0x45/0x240

[  160.032912]  [<ffffffff81662075>] ? _raw_spin_lock_irq+0x15/0x20

[  160.032920]  [<ffffffff8106cace>] do_exit+0x16e/0x450

[  160.032928]  [<ffffffff81662f20>] oops_end+0xb0/0xf0

[  160.032935]  [<ffffffff8164812f>] no_context+0x150/0x15d

[  160.032943]  [<ffffffff81648307>] __bad_area_nosemaphore+0x1cb/0x1ea

[  160.032951]  [<ffffffff816622ad>] ? restore_args+0x30/0x30

[  160.032959]  [<ffffffff8164795b>] ? pte_offset_kernel+0xe/0x37

[  160.032967]  [<ffffffff81648339>] bad_area_nosemaphore+0x13/0x15

[  160.032975]  [<ffffffff81665bab>] do_page_fault+0x46b/0x540

[  160.036054]  [<ffffffff8115c3f8>] ? mpol_shared_policy_init+0x48/0x160

[  160.036054]  [<ffffffff811667bd>] ? kmem_cache_alloc+0x11d/0x140

[  160.036054]  [<ffffffff8126d5fb>] ? hugetlbfs_alloc_inode+0x5b/0xa0

[  160.036054]  [<ffffffff816624f5>] page_fault+0x25/0x30

[  160.036054]  [<ffffffff81008efe>] ? xen_set_pte_at+0x3e/0x210

[  160.036054]  [<ffffffff81008ef9>] ? xen_set_pte_at+0x39/0x210

[  160.036054]  [<ffffffff81158453>] hugetlb_no_page+0x233/0x370

[  160.036054]  [<ffffffff8100640e>] ? xen_pud_val+0xe/0x10

[  160.036054]  [<ffffffff810053b5>] ? __raw_callee_save_xen_pud_val+0x11/0x1e

[  160.036054]  [<ffffffff8115883e>] hugetlb_fault+0x1fe/0x340

[  160.036054]  [<ffffffff81143e18>] ? vma_link+0x88/0xe0

[  160.036054]  [<ffffffff81140a3c>] handle_mm_fault+0x2ec/0x370

[  160.036054]  [<ffffffff816658be>] do_page_fault+0x17e/0x540

[  160.036054]  [<ffffffff81145af8>] ? do_mmap_pgoff+0x348/0x360

[  160.036054]  [<ffffffff81145bf1>] ? sys_mmap_pgoff+0xe1/0x230

[  160.036054]  [<ffffffff816624f5>] page_fault+0x25/0x30

On Mon, Feb 10, 2014 at 3:19 AM, Fabio Fantoni <fabio.fantoni@xxxxxxx> wrote:

Il 10/02/2014 11:42, Wei Liu ha scritto:

On Fri, Feb 07, 2014 at 01:19:45PM -0800, Peter X. Gao wrote:

Hi,

        I am new to Xen and I am trying to run Intel DPDK inside a domU with
virtio on Xen 4.2. Is it possible to do this?

Based on my tests about virtio:
- virtio-serial seems working out of box with windows domUs and also with xen pv driver, on linux domUs with old kernel (tested 2.6.32) is also working out of box but with newer kernel (tested >=3.2) require pci=nomsi to work correctly and works also with xen pvhvm drivers, for now I not found solution for msi problem, there are some posts about it.
- virtio-net was working out of box but with recent qemu versions is broken due qemu regression, I have narrowed down
with bisect (one commit between 4 Jul 2013 and 22 Jul 2013) but I unable to found the exact commit of regression because there are other critical problems with xen in the range.
- I not tested virtio-disk and I not know if is working with recent xen and qemu version.

DPDK doesn't seem to tightly coupled with VirtIO, does it?

Could you look at Xen's PV network protocol instead? VirtIO has no
mainline support on Xen while Xen's PV protocol has been in mainline for
years. And it's very likely to be enabled by default nowadays.

Wei.

Regards
Peter
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