Does your CPU even support those?
https://wiki.debian.org/Hugepages#x86_64
On 2016-05-31 12:26, chintu hetam wrote:
Strange for me both 2MB and 1GB hugepages are failing
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
QEMU_AUDIO_DRV=spice /usr/bin/qemu-kvm -name generic -S -machine
pc-i440fx-2.4,accel=kvm,usb=off,vmport=off,mem-merge=off -cpu
SandyBridge -m 32768 -mem-prealloc -mem-path
/dev/hugepages/libvirt/qemu -realtime mlock=on -smp
8,sockets=8,cores=1,threads=1 -uuid
d8f61bc1-dd9a-470f-a26f-824e5e2b8359 -no-user-config -nodefaults
-chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/generic.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc
base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard
-no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global
PIIX4_PM.disable_s4=1 -boot order=c,menu=on,strict=on -device
ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x6.0x7 -device
ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x6
-device
ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x6.0x1
-device
ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x6.0x2
-device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive
file=/home/vcr/Appliance-4.6.0.0_5-vtnet0.img,if=none,id=drive-virtio-disk0,format=raw
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x8,drive=drive-virtio-disk0,id=virtio-disk0
-drive
file=/dev/disk/by-id/scsi-36001405fdc0e99da3aa4b37b1403085c,if=none,id=drive-virtio-disk1,format=raw
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0xa,drive=drive-virtio-disk1,id=virtio-disk1
-netdev tap,fd=23,id=hostnet0,vhost=on,vhostfd=24 -device
virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:30:a0:c0,bus=pci.0,addr=0x3
-chardev pty,id=charserial0 -device
isa-serial,chardev=charserial0,id=serial0 -chardev
spicevmc,id=charchannel0,name=vdagent -device
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0
-spice
port=5900,addr=127.0.0.1,disable-ticketing,image-compression=off,seamless-migration=on
-device
qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vgamem_mb=16,bus=pci.0,addr=0x2
-device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device
hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev
spicevmc,id=charredir0,name=usbredir -device
usb-redir,chardev=charredir0,id=redir0 -chardev
spicevmc,id=charredir1,name=usbredir -device
usb-redir,chardev=charredir1,id=redir1 -device
vfio-pci,host=aa:02.0,id=hostdev0,bus=pci.0,addr=0x9,rombar=0 -device
vfio-pci,host=aa:02.1,id=hostdev1,bus=pci.0,addr=0xc,rombar=0 -device
vfio-pci,host=aa:02.2,id=hostdev2,bus=pci.0,addr=0xd,rombar=0 -device
vfio-pci,host=aa:02.3,id=hostdev3,bus=pci.0,addr=0xe,rombar=0 -device
vfio-pci,host=aa:06.0,id=hostdev4,bus=pci.0,addr=0xb,rombar=0 -device
vfio-pci,host=aa:06.1,id=hostdev5,bus=pci.0,addr=0xf,rombar=0 -device
vfio-pci,host=aa:06.2,id=hostdev6,bus=pci.0,addr=0x10,rombar=0 -device
vfio-pci,host=aa:06.3,id=hostdev7,bus=pci.0,addr=0x11,rombar=0 -device
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on
char device redirected to /dev/pts/2 (label charserial0)
(process:70685): GLib-ERROR **: gmem.c:100: failed to allocate 1048576
bytes
2016-05-31 16:20:39.371+0000: shutting down
:q
^C
[root@localhost vcr]# cat /proc/meminfo
MemTotal: 396231416 kB
MemFree: 318394500 kB
MemAvailable: 318898920 kB
Buffers: 3456 kB
Cached: 595536 kB
SwapCached: 0 kB
Active: 272052 kB
Inactive: 405868 kB
Active(anon): 86760 kB
Inactive(anon): 224 kB
Active(file): 185292 kB
Inactive(file): 405644 kB
Unevictable: 16372 kB
Mlocked: 16372 kB
SwapTotal: 4194300 kB
SwapFree: 4194300 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 95336 kB
Mapped: 139740 kB
Shmem: 1688 kB
Slab: 292452 kB
SReclaimable: 154600 kB
SUnreclaim: 137852 kB
KernelStack: 12816 kB
PageTables: 9432 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 164561272 kB
Committed_AS: 725316 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
CmaTotal: 0 kB
CmaFree: 0 kB
HugePages_Total: 32768
HugePages_Free: 32768
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 227008 kB
DirectMap2M: 4935680 kB
DirectMap1G: 399507456 kB
i tried qemu from preview 1G is failing in that too..dint try 2MB as yet..
On Fri, May 27, 2016 at 3:11 PM, Alex Williamson
<alex.william...@redhat.com <mailto:alex.william...@redhat.com>> wrote:
[re-adding vfio-users]
On Fri, 27 May 2016 15:03:17 -0400
chintu hetam <rometor...@gmail.com <mailto:rometor...@gmail.com>>
wrote:
> that worked Alex, sorry for the delay in response.
> so my memorybacking configuration was
> <memoryBacking>
> <hugepages>
> <page size='1048576' unit='KiB' nodeset='1'/>
> </hugepages>
> <nosharepages/>
> <locked/>
> </memoryBacking>
> i had to remove it completely in order to make it work.
>
> So confirming that hugepages and vfio has some issue, making VM
to hang in
> case of linux at startup and abruptly crashing from FreeBSD
guest during
> startup.
Can you see if the problem persists with updated QEMU from
virt-preview:
https://fedoraproject.org/wiki/Virtualization_Preview_Repository
2MB hugepages certainly works, I run it daily. 1GB hugepages sees
less
attention, but I certainly thought it worked as well. Thanks,
Alex
--
-chintu-
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