On Mon, Oct 06, 2014 at 05:34:28PM -0500, Joel Schopp wrote:
> I'm seeing a regression in 3.17 (compared to 3.16) when using the kernel
> in the kvm/qemu guest. I'm running with 64K pages on arm64. The same
> kernel boots on actual hardware fine. Has anybody else tested this
> kernel inside a qemu guest?
>
Yes, just ran 3.17 as host and guest with 64K pages on APM Mustang in a
loop booting, running hackbench, and shutting down guests for 100+
times. No problems. Bootlog here:
--------------------------------
Initializing cgroup subsys cpu
Linux version 3.17.0+ (christoffer@cbox) (gcc version 4.8.2 20130603 (prerelease) (crosstool-NG linaro-1.13.1-4.8-2013.06 - Linaro GCC 2013.06) ) #92 SMP PREEMPT Tue Oct 7 11:53:15 CEST 2014
CPU: AArch64 Processor [500f0000] revision 0
Detected PIPT I-cache on CPU0
efi: Getting EFI parameters from FDT:
efi: UEFI not found.
cma: Reserved 512 MiB at e0000000
psci: probing for conduit method from DT.
psci: PSCIv0.2 detected in firmware.
psci: Using standard PSCI v0.2 function IDs
PERCPU: Embedded 1 pages/cpu @fffffe00fff70000 s13248 r8192 d44096 u65536
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 65480
Kernel command line: console=ttyAMA0 root=/dev/vda rw
log_buf_len individual max cpu contribution: 4096 bytes
log_buf_len total cpu_extra contributions: 12288 bytes
log_buf_len min size: 16384 bytes
log_buf_len: 32768 bytes
early log buf free: 14824(90%)
PID hash table entries: 4096 (order: -1, 32768 bytes)
Dentry cache hash table entries: 524288 (order: 6, 4194304 bytes)
Inode-cache hash table entries: 262144 (order: 5, 2097152 bytes)
Memory: 3651712K/4194304K available (4487K kernel code, 463K rwdata, 1664K rodata, 332K init, 395K bss, 542592K reserved)
Virtual kernel memory layout:
vmalloc : 0xfffffc0000000000 - 0xfffffdfeffff0000 ( 2043 GB)
vmemmap : 0xfffffdff00000000 - 0xfffffdffe0000000 ( 3 GB maximum)
0xfffffdff000e0000 - 0xfffffdff00460000 ( 3 MB actual)
PCI I/O : 0xfffffdfffa000000 - 0xfffffdfffb000000 ( 16 MB)
fixed : 0xfffffdfffbde0000 - 0xfffffdfffbdf0000 ( 64 KB)
modules : 0xfffffdfffc000000 - 0xfffffe0000000000 ( 64 MB)
memory : 0xfffffe0000000000 - 0xfffffe0100000000 ( 4096 MB)
.init : 0xfffffe00006a0000 - 0xfffffe00006f33c0 ( 333 KB)
.text : 0xfffffe0000080000 - 0xfffffe0000691f74 ( 6216 KB)
.data : 0xfffffe0000700000 - 0xfffffe0000773f60 ( 464 KB)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
Preemptible hierarchical RCU implementation.
RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=4.
RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
NR_IRQS:64 nr_irqs:64 0
Architected cp15 timer(s) running at 50.00MHz (virt).
sched_clock: 56 bits at 50MHz, resolution 20ns, wraps every 2748779069440ns
Console: colour dummy device 80x25
allocated 1048576 bytes of page_cgroup
please try 'cgroup_disable=memory' option if you don't want memory cgroups
Calibrating delay loop (skipped), value calculated using timer frequency.. 100.00 BogoMIPS (lpj=500000)
pid_max: default: 32768 minimum: 301
Security Framework initialized
Mount-cache hash table entries: 8192 (order: 0, 65536 bytes)
Mountpoint-cache hash table entries: 8192 (order: 0, 65536 bytes)
Initializing cgroup subsys memory
Initializing cgroup subsys hugetlb
hw perfevents: enabled with arm/armv8-pmuv3 PMU driver, 1 counters available
EFI services will not be available.
CPU1: Booted secondary processor
Detected PIPT I-cache on CPU1
CPU2: Booted secondary processor
Detected PIPT I-cache on CPU2
CPU3: Booted secondary processor
Detected PIPT I-cache on CPU3
Brought up 4 CPUs
SMP: Total of 4 processors activated.
devtmpfs: initialized
regulator-dummy: no parameters
NET: Registered protocol family 16
vdso: 2 pages (1 code @ fffffe0000720000, 1 data @ fffffe0000710000)
hw-breakpoint: found 4 breakpoint and 4 watchpoint registers.
software IO TLB [mem 0xc0000000-0xc4000000] (64MB) mapped at [fffffe0080000000-fffffe0083ffffff]
Serial: AMBA PL011 UART driver
9000000.pl011: ttyAMA0 at MMIO 0x9000000 (irq = 33, base_baud = 0) is a PL011 rev1
console [ttyAMA0] enabled
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
Switched to clocksource arch_sys_counter
NET: Registered protocol family 2
TCP established hash table entries: 32768 (order: 2, 262144 bytes)
TCP bind hash table entries: 32768 (order: 3, 524288 bytes)
TCP: Hash tables configured (established 32768 bind 32768)
TCP: reno registered
UDP hash table entries: 2048 (order: 0, 65536 bytes)
UDP-Lite hash table entries: 2048 (order: 0, 65536 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
kvm [1]: HYP mode not available
futex hash table entries: 1024 (order: 0, 65536 bytes)
audit: initializing netlink subsys (disabled)
audit: type=2000 audit(0.280:1): initialized
HugeTLB registered 512 MB page size, pre-allocated 0 pages
fuse init (API version 7.23)
9p: Installing v9fs 9p2000 file system support
msgmni has been set to 8156
io scheduler noop registered
io scheduler cfq registered (default)
Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
loop: module loaded
vda: unknown partition table
tun: Universal TUN/TAP device driver, 1.6
tun: (C) 1999-2004 Max Krasnyansky <maxk@xxxxxxxxxxxx>
usbcore: registered new interface driver usb-storage
mousedev: PS/2 mouse device common for all mice
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
TCP: cubic registered
NET: Registered protocol family 17
9pnet: Installing 9P2000 support
registered taskstats version 1
EXT2-fs (vda): error: couldn't mount because of unsupported optional features (240)
EXT4-fs (vda): mounted filesystem with ordered data mode. Opts: (null)
VFS: Mounted root (ext4 filesystem) on device 254:0.
devtmpfs: mounted
Freeing unused kernel memory: 320K (fffffe00006a0000 - fffffe00006f0000)
Mount failed for selinuxfs on /sys/fs/selinux: No such file or directory
random: init urandom read with 5 bits of entropy available
init: plymouth-upstart-bridge main process ended, respawning
init: plymouth-upstart-bridge main process ended, respawning
* Starting Mount filesystems on boot[74G[ OK ]
* Starting Signal sysvinit that the rootfs is mounted[74G[ OK ]
* Starting Populate /dev filesystem[74G[ OK ]
* Stopping Populate /dev filesystem[74G[ OK ]
* Starting Clean /tmp directory[74G[ OK ]
* Starting Populate and link to /run filesystem[74G[ OK ]
* Stopping Clean /tmp directory[74G[ OK ]
* Stopping Populate and link to /run filesystem[74G[ OK ]
* Starting set console keymap[74G[ OK ]
* Starting Signal sysvinit that virtual filesystems are mounted[74G[ OK ]
* Starting Signal sysvinit that virtual filesystems are mounted[74G[ OK ]
* Starting Bridge udev events into upstart[74G[ OK ]
* Stopping Track if upstart is running in a container[74G[ OK ]
* Stopping set console keymap[74G[ OK ]
* Starting Signal sysvinit that local filesystems are mounted[74G[ OK ]
* Starting device node and kernel event manager[74G[ OK ]
* Starting Signal sysvinit that remote filesystems are mounted[74G[ OK ]
* Starting load modules from /etc/modules[74G[ OK ]
* Starting cold plug devices[74G[ OK ]
* Starting log initial device creation[74G[ OK ]
* Stopping load modules from /etc/modules[74G[ OK ]
* Starting flush early job output to logs[74G[ OK ]
* Stopping flush early job output to logs[74G[ OK ]
* Starting configure network device security[74G[ OK ]
* Starting configure network device security[74G[ OK ]
* Starting system logging daemon[74G[ OK ]
* Stopping Mount filesystems on boot[74G[ OK ]
* Starting configure network device[74G[ OK ]
* Stopping cold plug devices[74G[ OK ]
* Starting Mount network filesystems[74G[ OK ]
* Starting Failsafe Boot Delay[74G[ OK ]
* Starting load fallback graphics devices[74G[ OK ]
* Starting configure network device security[74G[ OK ]
* Starting load fallback graphics devices[74G[[31mfail[39;49m]
* Starting set console font[74G[ OK ]
* Starting configure network device[74G[ OK ]
* Stopping set console font[74G[ OK ]
* Starting userspace bootsplash[74G[ OK ]
* Stopping log initial device creation[74G[ OK ]
* Stopping Failsafe Boot Delay[74G[ OK ]
* Starting configure virtual network devices[74G[ OK ]
* Stopping userspace bootsplash[74G[ OK ]
* Starting System V initialisation compatibility[74G[ OK ]
* Starting Send an event to indicate plymouth is up[74G[ OK ]
* Stopping Mount network filesystems[74G[ OK ]
* Stopping System V initialisation compatibility[74G[ OK ]
* Stopping Send an event to indicate plymouth is up[74G[ OK ]
* Starting System V runlevel compatibility[74G[ OK ]
* Starting regular background program processing daemon[74G[ OK ]
* Starting save kernel messages[74G[ OK ]
* Stopping System V runlevel compatibility[74G[ OK ]
* Stopping save kernel messages[74G[ OK ]
Last login: Thu Jan 1 00:00:01 UTC 1970 on tty1
Welcome to Ubuntu 14.04 LTS (GNU/Linux 3.17.0+ aarch64)
* Documentation: http://www.linaro.org
root@aarch64-kvm-guest:~#
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