* [Qemu-devel] is qemu-2.1 support 1G hugepage
@ 2014-10-24 8:22 Linhaifeng
2014-10-27 3:34 ` Michal Privoznik
0 siblings, 1 reply; 2+ messages in thread
From: Linhaifeng @ 2014-10-24 8:22 UTC (permalink / raw)
To: qemu-devel; +Cc: liuyongan, lilijun
Hi,
I run qemu2.1 with 1G hugepage and found that VM can't start (too slowly?) but can start with 2M hugepage quickly.
kernel version:3.10.0-123.6.3.el7.x86_64
command:qemu-kvm -name vm1 -enable-kvm -smp 2 -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/dev/hugepages,share=on -numa node,memdev=mem \
-chardev socket,id=chr0,path=/path/socket -netdev type=vhost-user,id=net0,chardev=chr0 -device virtio-net-pci,netdev=net0,mac=00:00:00:00:00:01
-drive file=/mnt/sdb/imgs/vm1.img -vnc :0
--
Regards,
Haifeng
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [Qemu-devel] is qemu-2.1 support 1G hugepage
2014-10-24 8:22 [Qemu-devel] is qemu-2.1 support 1G hugepage Linhaifeng
@ 2014-10-27 3:34 ` Michal Privoznik
0 siblings, 0 replies; 2+ messages in thread
From: Michal Privoznik @ 2014-10-27 3:34 UTC (permalink / raw)
To: Linhaifeng, qemu-devel; +Cc: liuyongan, lilijun
On 24.10.2014 10:22, Linhaifeng wrote:
> Hi,
>
> I run qemu2.1 with 1G hugepage and found that VM can't start (too slowly?) but can start with 2M hugepage quickly.
>
> kernel version:3.10.0-123.6.3.el7.x86_64
>
> command:qemu-kvm -name vm1 -enable-kvm -smp 2 -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/dev/hugepages,share=on -numa node,memdev=mem \
> -chardev socket,id=chr0,path=/path/socket -netdev type=vhost-user,id=net0,chardev=chr0 -device virtio-net-pci,netdev=net0,mac=00:00:00:00:00:01
> -drive file=/mnt/sdb/imgs/vm1.img -vnc :0
>
What's the error message you're seeing? What's the filesystem mounted on
/dev/hugepages? Moreover, 1GB hugepages can't be allocated at runtime
currently, so do you allocate them on the host boot up process?
Michal
^ permalink raw reply [flat|nested] 2+ messages in thread
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