Jatin Davey
2015-Apr-14 13:16 UTC
Re: [libvirt-users] VM Performance using KVM Vs. VMware ESXi
On 4/14/2015 6:32 PM, Tom Hughes wrote:> On 14/04/15 13:33, Jatin Davey wrote: > >> Thanks Dominique & Daniel. >> >> Looks like i need to upgrade my VMs kernel to make it aware of virtio. >> >> Found this information from this link: >> >> http://wiki.libvirt.org/page/Virtio#Disk_.28block.29_device_driver >> >> I tried without upgrading the Kernel and as soon as i start my VM it got >> into Kernel Panic. I will try using virtio after upgrading my VMs >> kernel. > > As somebody has already said it would have to be a really old kernel > to not handle virtio-block, and it's more likely that your bootloader > and/or initrd are confused by sda becoming vda. > > However if your kernel supports it then virtio-scsi should be even > better than virtio-block and shouldn't cause the device name to change. > > Tom >My VM is using the kernel 2.6.18-164.el5 [root@localhost ~]# uname -a Linux localhost 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux Should this be fine ? Thanks Jatin
Tom Hughes
2015-Apr-14 13:21 UTC
Re: [libvirt-users] VM Performance using KVM Vs. VMware ESXi
On 14/04/15 14:16, Jatin Davey wrote:> My VM is using the kernel 2.6.18-164.el5 > > [root@localhost ~]# uname -a > Linux localhost 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 > x86_64 x86_64 GNU/Linux > > Should this be fine ?Well it won't have virtio-scsi I'm sure, but what does "modinfo virtio-blk" say about virtio-block? Tom -- Tom Hughes (tom@compton.nu) http://compton.nu/
Jatin Davey
2015-Apr-14 13:26 UTC
Re: [libvirt-users] VM Performance using KVM Vs. VMware ESXi
On 4/14/2015 6:51 PM, Tom Hughes wrote:> On 14/04/15 14:16, Jatin Davey wrote: > >> My VM is using the kernel 2.6.18-164.el5 >> >> [root@localhost ~]# uname -a >> Linux localhost 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 >> x86_64 x86_64 GNU/Linux >> >> Should this be fine ? > > Well it won't have virtio-scsi I'm sure,[Jatin] Yes , it does not have virtio-scsi [root@localhost virtio]# modinfo virtio-scsi modinfo: could not find module virtio-scsi> but what does "modinfo virtio-blk" say about virtio-block?[Jatin] [root@localhost virtio]# modinfo virtio-blk filename: /lib/modules/2.6.18-164.el5/kernel/drivers/block/virtio_blk.ko license: GPL description: Virtio block driver alias: virtio:d00000002v* srcversion: A9DBCDB63CCE543B4BBAF31 depends: virtio vermagic: 2.6.18-164.el5 SMP mod_unload gcc-4.1 module_sig: 883f3504a9f767957f09578a977b7e1121870a0c3c17c4c17a09f4825b9b3add41f93c65bf75ad0a0afa2471b36c74a6c7dedc468dd197c1d9eea86aa> > Tom >Thanks Jatin
Dennis Jacobfeuerborn
2015-Apr-15 01:08 UTC
Re: [libvirt-users] VM Performance using KVM Vs. VMware ESXi
On 14.04.2015 15:16, Jatin Davey wrote:> On 4/14/2015 6:32 PM, Tom Hughes wrote: >> On 14/04/15 13:33, Jatin Davey wrote: >> >>> Thanks Dominique & Daniel. >>> >>> Looks like i need to upgrade my VMs kernel to make it aware of virtio. >>> >>> Found this information from this link: >>> >>> http://wiki.libvirt.org/page/Virtio#Disk_.28block.29_device_driver >>> >>> I tried without upgrading the Kernel and as soon as i start my VM it got >>> into Kernel Panic. I will try using virtio after upgrading my VMs >>> kernel. >> >> As somebody has already said it would have to be a really old kernel >> to not handle virtio-block, and it's more likely that your bootloader >> and/or initrd are confused by sda becoming vda. >> >> However if your kernel supports it then virtio-scsi should be even >> better than virtio-block and shouldn't cause the device name to change. >> >> Tom >> > My VM is using the kernel 2.6.18-164.el5 > > [root@localhost ~]# uname -a > Linux localhost 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 > x86_64 x86_64 GNU/Linux > > Should this be fine ?Is there any particular reason why you are using RHEL 5? The current version is RHEL 7 which contains much more up-to-date versions of kernel, qemu and other virtualization tools. Regards, Dennis
Jatin Davey
2015-Apr-15 03:55 UTC
Re: [libvirt-users] VM Performance using KVM Vs. VMware ESXi
> Is there any particular reason why you are using RHEL 5? The current > version is RHEL 7 which contains much more up-to-date versions of > kernel, qemu and other virtualization tools. > > Regards, > Dennis > > > _______________________________________________ > libvirt-users mailing list > libvirt-users@redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users >I am looking at upgrading to RHEL 7 or 6.6 but before getting there i want to see if the existing version works fine. If it works then i am good but if it does not then i will have to upgrade to newer versions. Thanks Jatin