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Re: [Qemu-devel] virtio-scsi vs. virtio-blk
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] virtio-scsi vs. virtio-blk |
Date: |
Fri, 10 Aug 2012 14:39:48 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120717 Thunderbird/14.0 |
Il 10/08/2012 14:35, Stefan Priebe - Profihost AG ha scritto:
>>
>> One way to activate passthough is via scsi-generic:
>> Example:
>> -device lsi -device scsi-generic,drive=MyISCSI \
>> -drive file=iscsi://10.1.1.125/iqn.ronnie.test/1,if=none,id=MyI
>
> When i do this the guest system always uses the sym53c8xx kernel module.
> This results in 70 iops instead of 30000 iops. Is this really correct
> that it uses the very old sym53c8xx kernel module for this device?
>
> used start command:
> http://pastebin.com/raw.php?i=23fkaQgc
Just replace lsi with virtio-scsi-pci again. Also, using scsi-block
instead of scsi-generic should have better performance, but I'm not sure
Ronnie tested it with libiscsi.
Paolo
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, (continued)
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Paolo Bonzini, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Paolo Bonzini, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, ronnie sahlberg, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, ronnie sahlberg, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, ronnie sahlberg, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk,
Paolo Bonzini <=
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, ronnie sahlberg, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, ronnie sahlberg, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/10
- Re: [Qemu-devel] virtio-scsi vs. virtio-blk, Stefan Priebe - Profihost AG, 2012/08/10