We have tested it under high load and it has performed well, here's the
boot log, nothing bug related was there:
Xen Minimal OS!
start_info: 0xb1a000(VA)
nr_pages: 0x6cc00
shared_inf: 0xbff4a000(MA)
pt_base: 0xb1d000(VA)
nr_pt_frames: 0x9
mfn_list: 0x967000(VA)
mod_start: 0x0(VA)
mod_len: 0
flags: 0x0
cmd_line: root=/dev/sda1 ro 4
stack: 0x946780-0x966780
MM: Init
_text: 0x0(VA)
_etext: 0x621f5(VA)
_erodata: 0x76000(VA)
_edata: 0x7b6d4(VA)
stack start: 0x946780(VA)
_end: 0x966d34(VA)
start_pfn: b29
max_pfn: 6cc00
Mapping memory range 0xc00000 - 0x6cc00000
setting 0x0-0x76000 readonly
skipped 0x1000
MM: Initialise page allocator for e8a000(e8a000)-0(6cc00000)
MM: done
Demand map pfns at 6cc01000-7cc01000.
Heap resides at 7cc02000-bcc02000.
Initialising timer interface
Initialising console ... done.
gnttab_table mapped at 0x6cc01000.
Initialising scheduler
Thread "Idle": pointer: 0x7cc02008, stack: 0x6c850000
Initialising xenbus
Thread "xenstore": pointer: 0x7cc02478, stack: 0x6c860000
Dummy main: start_info=0x966880
Thread "main": pointer: 0x7cc028e8, stack: 0x6c870000
"main" "root=/dev/sda1" "ro" "4"
vbd 2049 is hd0
******************* BLKFRONT for device/vbd/2049 **********
backend at /local/domain/0/backend/vbd/15/2049
Failed to read /local/domain/0/backend/vbd/15/2049/feature-barrier.
Failed to read /local/domain/0/backend/vbd/15/2049/feature-flush-cache.
16777216 sectors of 0 bytes
**************************
vbd 2050 is hd1
******************* BLKFRONT for device/vbd/2050 **********
backend at /local/domain/0/backend/vbd/15/2050
Failed to read /local/domain/0/backend/vbd/15/2050/feature-barrier.
Failed to read /local/domain/0/backend/vbd/15/2050/feature-flush-cache.
712971264 sectors of 0 bytes
**************************
vbd 2051 is hd2
******************* BLKFRONT for device/vbd/2051 **********
backend at /local/domain/0/backend/vbd/15/2051
Failed to read /local/domain/0/backend/vbd/15/2051/feature-barrier.
Failed to read /local/domain/0/backend/vbd/15/2051/feature-flush-cache.
1835008 sectors of 0 bytes
**************************
[H
[J Booting 'Ubuntu 11.04, kernel 2.6.38-13-virtual'
root (hd0)
Filesystem type is ext2fs, using whole disk
kernel /boot/vmlinuz-2.6.38-13-virtual root=LABEL=uec-rootfs ro
console=hvc0
initrd /boot/initrd.img-2.6.38-13-virtual
close blk: backend at /local/domain/0/backend/vbd/15/2049
close blk: backend at /local/domain/0/backend/vbd/15/2050
close blk: backend at /local/domain/0/backend/vbd/15/2051
[ 0.000000] Reserving virtual address space above 0xf5800000
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Linux version 2.6.38-13-virtual (buildd@zirconium) (gcc version
4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4) ) #52-Ubuntu SMP Tue Nov 8 18:54:04 UTC
2011 (Ubuntu 2.6.38-13.52-virtual 2.6.38.8)
[ 0.000000] ACPI in unprivileged domain disabled
[ 0.000000] released 0 pages of unused memory
[ 0.000000] BIOS-provided physical RAM map:
[ 0.000000] Xen: 0000000000000000 - 00000000000a0000 (usable)
[ 0.000000] Xen: 00000000000a0000 - 0000000000100000 (reserved)
[ 0.000000] Xen: 0000000000100000 - 000000006d400000 (usable)
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] DMI not present or invalid.
[ 0.000000] last_pfn = 0x6d400 max_arch_pfn = 0x1000000
[ 0.000000] init_memory_mapping: 0000000000000000-000000002d3fe000
[ 0.000000] RAMDISK: 00cd2000 - 016bc000
[ 0.000000] 1024MB HIGHMEM available.
[ 0.000000] 723MB LOWMEM available.
[ 0.000000] mapped low ram: 0 - 2d3fe000
[ 0.000000] low ram: 0 - 2d3fe000
[ 0.000000] Zone PFN ranges:
[ 0.000000] DMA 0x00000010 -> 0x00001000
[ 0.000000] Normal 0x00001000 -> 0x0002d3fe
[ 0.000000] HighMem 0x0002d3fe -> 0x0006d400
[ 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 -> 0x0006d400
[ 0.000000] Using APIC driver default
[ 0.000000] SFI: Simple Firmware Interface v0.81 http://simplefirmware.org
[ 0.000000] SMP: Allowing 2 CPUs, 0 hotplug CPUs
[ 0.000000] Local APIC disabled by BIOS -- you can enable it with "lapic"
[ 0.000000] APIC: disable apic facility
[ 0.000000] APIC: switched to apic NOOP
[ 0.000000] PM: Registered nosave memory: 00000000000a0000 - 0000000000100000
[ 0.000000] Allocating PCI resources starting at 6d400000 (gap:
6d400000:92c00000)
[ 0.000000] Booting paravirtualized kernel on Xen
[ 0.000000] Xen version: 3.4.3-2.6.18 (preserve-AD)
[ 0.000000] setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:2
nr_node_ids:1
[ 0.000000] PERCPU: Embedded 13 pages/cpu @ec632000 s32320 r0 d20928 u53248
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total
pages: 443879
[ 0.000000] Kernel command line: root=LABEL=uec-rootfs ro console=hvc0
[ 0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[ 0.000000] Initializing CPU#0
[ 0.000000] allocated 8949440 bytes of page_cgroup
[ 0.000000] please try 'cgroup_disable=memory' option if you don't want
memory cgroups
[ 0.000000] Initializing HighMem for node 0 (0002d3fe:0006d400)
[ 0.000000] Memory: 1734640k/1789952k available (5371k kernel code, 46672k
reserved, 2600k data, 724k init, 1040392k highmem)
[ 0.000000] virtual kernel memory layout:
[ 0.000000] fixmap : 0xf5716000 - 0xf57ff000 ( 932 kB)
[ 0.000000] pkmap : 0xf5400000 - 0xf5600000 (2048 kB)
[ 0.000000] vmalloc : 0xedbfe000 - 0xf53fe000 ( 120 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xed3fe000 ( 723 MB)
[ 0.000000] .init : 0xc08c9000 - 0xc097e000 ( 724 kB)
[ 0.000000] .data : 0xc063ec81 - 0xc08c8ec0 (2600 kB)
[ 0.000000] .text : 0xc0100000 - 0xc063ec81 (5371 kB)
[ 0.000000] SLUB: Genslabs=15, HWalign=64, Order=0-3, MinObjects=0, CPUs=2,
Nodes=1
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] RCU dyntick-idle grace-period acceleration is enabled.
[ 0.000000] RCU-based detection of stalled CPUs is disabled.
[ 0.000000] NR_IRQS:2304 nr_irqs:288 16
[ 0.000000] Console: colour dummy device 80x25
[ 0.000000] console [tty0] enabled
[ 0.000000] console [hvc0] enabled
[ 0.000000] installing Xen timer for CPU 0
[ 0.000000] Detected 2333.414 MHz processor.
[ 0.004000] Calibrating delay loop (skipped), value calculated using timer
frequency.. 4666.82 BogoMIPS (lpj=9333656)
[ 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] Mount-cache hash table entries: 512
[ 0.004000] Initializing cgroup subsys ns
[ 0.004000] ns_cgroup deprecated: consider using the 'clone_children' flag
without the ns_cgroup.
[ 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 net_cls
[ 0.004000] Initializing cgroup subsys blkio
[ 0.004000] CPU: Unsupported number of siblings 4
[ 0.004000] SMP alternatives: switching to UP code
[ 0.007087] ftrace: allocating 24324 entries in 48 pages
[ 0.008073] cpu 0 spinlock event irq 286
[ 0.008117] Performance Events: unsupported p6 CPU model 23 no PMU driver,
software events only.
[ 0.008900] installing Xen timer for CPU 1
[ 0.008927] cpu 1 spinlock event irq 280
[ 0.008961] SMP alternatives: switching to SMP code
[ 0.004000] Initializing CPU#1
[ 0.004000] CPU: Unsupported number of siblings 4
[ 0.012178] Brought up 2 CPUs
[ 0.012328] devtmpfs: initialized
[ 0.013146] Grant table initialized
[ 0.013242] print_constraints: dummy:
[ 0.033899] Time: 165:165:165 Date: 165/165/65
[ 0.033972] NET: Registered protocol family 16
[ 0.034142] Trying to unpack rootfs image as initramfs...
[ 0.044411] EISA bus registered
[ 0.056003] PCI: setting up Xen PCI frontend stub
[ 0.057909] bio: create slab <bio-0> at 0
[ 0.058090] ACPI: Interpreter disabled.
[ 0.060559] xen_balloon: Initialising balloon driver.
[ 0.060597] last_pfn = 0x6d400 max_arch_pfn = 0x1000000
[ 0.060817] vgaarb: loaded
[ 0.061202] SCSI subsystem initialized
[ 0.064191] usbcore: registered new interface driver usbfs
[ 0.064222] usbcore: registered new interface driver hub
[ 0.064289] usbcore: registered new device driver usb
[ 0.064475] PCI: System does not support PCI
[ 0.064486] PCI: System does not support PCI
[ 0.064648] NetLabel: Initializing
[ 0.064657] NetLabel: domain hash size = 128
[ 0.064665] NetLabel: protocols = UNLABELED CIPSOv4
[ 0.064691] NetLabel: unlabeled traffic allowed by default
[ 0.064749] Switching to clocksource xen
[ 0.064779] Switched to NOHz mode on CPU #1
[ 0.067250] Switched to NOHz mode on CPU #0
[ 0.072060] Freeing initrd memory: 10152k freed
[ 0.077606] AppArmor: AppArmor Filesystem Enabled
[ 0.077651] pnp: PnP ACPI: disabled
[ 0.077661] PnPBIOS: Disabled
[ 0.080635] NET: Registered protocol family 2
[ 0.080720] IP route cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 0.080993] TCP established hash table entries: 131072 (order: 8, 1048576
bytes)
[ 0.081509] TCP bind hash table entries: 65536 (order: 7, 524288 bytes)
[ 0.081769] TCP: Hash tables configured (established 131072 bind 65536)
[ 0.081781] TCP reno registered
[ 0.081790] UDP hash table entries: 512 (order: 2, 16384 bytes)
[ 0.081808] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[ 0.081917] NET: Registered protocol family 1
[ 0.082125] platform rtc_cmos: registered platform RTC device (no PNP device
found)
[ 0.082279] cpufreq-nforce2: No nForce2 chipset.
[ 0.082489] audit: initializing netlink socket (disabled)
[ 0.082509] type=2000 audit(1321357810.382:1): initialized
[ 0.091876] highmem bounce pool size: 64 pages
[ 0.091898] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[ 0.094646] VFS: Disk quotas dquot_6.5.2
[ 0.094729] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[ 0.095770] fuse init (API version 7.16)
[ 0.095916] msgmni has been set to 1391
[ 0.096339] Block layer SCSI generic (bsg) driver version 0.4 loaded (major
253)
[ 0.096393] io scheduler noop registered
[ 0.096401] io scheduler deadline registered
[ 0.096423] io scheduler cfq registered (default)
[ 0.096562] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[ 0.096608] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[ 0.096763] isapnp: Scanning for PnP cards...
[ 0.097163] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled
[ 0.449547] isapnp: No Plug & Play device found
[ 0.568294] Linux agpgart interface v0.103
[ 0.570405] brd: module loaded
[ 0.571424] loop: module loaded
[ 0.574742] blkfront device/vbd/2049 num-ring-pages 4 nr_ents 128.
[ 0.580123] blkfront device/vbd/2050 num-ring-pages 4 nr_ents 128.
[ 0.580848] blkfront: xvda1: barriers disabled
[ 0.586406] blkfront device/vbd/2051 num-ring-pages 4 nr_ents 128.
[ 0.587859] i2c-core: driver [adp5520] using legacy suspend method
[ 0.587871] i2c-core: driver [adp5520] using legacy resume method
[ 0.588524] blkfront: xvda2: barriers disabled
[ 0.589081] Fixed MDIO Bus: probed
[ 0.589178] PPP generic driver version 2.4.2
[ 0.589292] Initialising Xen virtual ethernet driver.
[ 0.589832] Setting capacity to 712971264
[ 0.589861] xvda2: detected capacity change from 0 to 365041287168
[ 0.591288] blkfront: xvda3: barriers disabled
[ 0.591358] tun: Universal TUN/TAP device driver, 1.6
[ 0.591369] tun: (C) 1999-2004 Max Krasnyansky <[email protected]>
[ 0.591533] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 0.591583] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 0.591607] uhci_hcd: USB Universal Host Controller Interface driver
[ 0.591690] i8042: PNP: No PS/2 controller found. Probing ports directly.
[ 0.592519] i8042: No controller found
[ 0.592686] mousedev: PS/2 mouse device common for all mice
[ 0.592908] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0
[ 0.593044] rtc_cmos: probe of rtc_cmos failed with error -38
[ 0.593144] device-mapper: uevent: version 1.0.3
[ 0.593206] Setting capacity to 1835008
[ 0.593219] xvda3: detected capacity change from 0 to 939524096
[ 0.593318] device-mapper: ioctl: 4.19.1-ioctl (2011-01-07) initialised:
[email protected]
[ 0.593474] device-mapper: multipath: version 1.2.0 loaded
[ 0.593504] device-mapper: multipath round-robin: version 1.0.0 loaded
[ 0.593647] EISA: Probing bus 0 at eisa.0
[ 0.593677] EISA: Detected 0 cards.
[ 0.593808] cpuidle: using governor ladder
[ 0.593818] cpuidle: using governor menu
[ 0.594100] TCP cubic registered
[ 0.594336] NET: Registered protocol family 10
[ 0.595237] NET: Registered protocol family 17
[ 0.595265] Registering the dns_resolver key type
[ 0.595303] Using IPI No-Shortcut mode
[ 0.595490] registered taskstats version 1
[ 0.692096] XENBUS: Device with no driver: device/console/0
[ 0.692133] Magic number: 1:252:3141
[ 0.692177] /build/buildd/linux-2.6.38/drivers/rtc/hctosys.c: unable to open
rtc device (rtc0)
[ 0.692190] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
[ 0.692198] EDD information not available.
[ 0.692696] Freeing unused kernel memory: 724k freed
[ 0.694911] Write protecting the kernel text: 5372k
[ 0.695730] Write protecting the kernel read-only data: 2196k
[ 0.695745] NX-protecting the kernel data: 3844k
Loading, please wait...
[ 0.740970] <30>udev[63]: starting version 167
Begin: Loading essential drivers ... done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
Begin: Running /scripts/local-premount ... done.
[ 0.939589] EXT4-fs (xvda1): mounted filesystem with ordered data mode.
Opts: (null)
Begin: Running /scripts/local-bottom ... done.
done.
Begin: Running /scripts/init-bottom ... done.
lxcmount stop/pre-start, process 174
init: udev-fallback-graphics main process (394) terminated with status 1
cloud-init start-local running: Tue, 15 Nov 2011 11:50:21 +0000. up 10.92
seconds
no instance data found in start-local
init: cloud-init-local main process (221) terminated with status 1
cloud-init start running: Tue, 15 Nov 2011 11:50:22 +0000. up 12.03 seconds
found data source: DataSourceEc2
mountall: Event failed
fsck from util-linux-ng 2.17.2
/dev/xvda2: clean, 11/22282240 files, 1448312/89121408 blocks
init: ureadahead-other main process (543) terminated with status 4
* Starting AppArmor profiles
[80G
[74G[ OK ]
Generating locales...
en_US.UTF-8... up-to-date
Generation complete.
Generating public/private rsa key pair.
...
** Tags removed: verification-needed-natty
** Tags added: verification-done-natty
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https://bugs.launchpad.net/bugs/854050
Title:
BUG at /build/buildd/linux-2.6.38/mm/swapfile.c:255
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