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Re: [Qemu-devel] Why I advise against using ivshmem
From: |
David Marchand |
Subject: |
Re: [Qemu-devel] Why I advise against using ivshmem |
Date: |
Tue, 17 Jun 2014 11:03:32 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Icedove/24.5.0 |
Hello all,
On 06/17/2014 04:54 AM, Stefan Hajnoczi wrote:
ivshmem has a performance disadvantage for guest-to-host
communication. Since the shared memory is exposed as PCI BARs, the
guest has to memcpy into the shared memory.
vhost-user can access guest memory directly and avoid the copy inside the guest.
Actually, you can avoid this memory copy using frameworks like DPDK.
Unless someone steps up and maintains ivshmem, I think it should be
deprecated and dropped from QEMU.
Then I can maintain ivshmem for QEMU.
If this is ok, I will send a patch for MAINTAINERS file.
--
David Marchand
- Re: [Qemu-devel] Why I advise against using ivshmem, (continued)
- Re: [Qemu-devel] Why I advise against using ivshmem, Vincent JARDIN, 2014/06/12
- Re: [Qemu-devel] Why I advise against using ivshmem, Paolo Bonzini, 2014/06/12
- Re: [Qemu-devel] Why I advise against using ivshmem, Markus Armbruster, 2014/06/13
- Re: [Qemu-devel] Why I advise against using ivshmem, Vincent JARDIN, 2014/06/13
- Re: [Qemu-devel] Why I advise against using ivshmem, Jobin Raju George, 2014/06/13
- Re: [Qemu-devel] Why I advise against using ivshmem, Paolo Bonzini, 2014/06/13
- Re: [Qemu-devel] Why I advise against using ivshmem, Vincent JARDIN, 2014/06/13
- Re: [Qemu-devel] Why I advise against using ivshmem, Paolo Bonzini, 2014/06/13
- Re: [Qemu-devel] Why I advise against using ivshmem, Vincent JARDIN, 2014/06/14
- Re: [Qemu-devel] Why I advise against using ivshmem, Stefan Hajnoczi, 2014/06/16
- Re: [Qemu-devel] Why I advise against using ivshmem,
David Marchand <=
- Re: [Qemu-devel] Why I advise against using ivshmem, Paolo Bonzini, 2014/06/17
- Re: [Qemu-devel] Why I advise against using ivshmem, Stefan Hajnoczi, 2014/06/18
- Re: [Qemu-devel] Why I advise against using ivshmem, David Marchand, 2014/06/18
- Re: [Qemu-devel] Why I advise against using ivshmem, Paolo Bonzini, 2014/06/18
- Re: [Qemu-devel] Why I advise against using ivshmem, Stefan Hajnoczi, 2014/06/21
- Re: [Qemu-devel] Why I advise against using ivshmem, Cam Macdonell, 2014/06/26
- Re: [Qemu-devel] Why I advise against using ivshmem, Andreas Färber, 2014/06/18
- Re: [Qemu-devel] Why I advise against using ivshmem, David Marchand, 2014/06/19
- Re: [Qemu-devel] Why I advise against using ivshmem, Markus Armbruster, 2014/06/30
- Re: [Qemu-devel] Why I advise against using ivshmem, Stefan Hajnoczi, 2014/06/18