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Re: [Qemu-devel] [PATCH v4 1/1] vhost user: add support of live migratio
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v4 1/1] vhost user: add support of live migration |
Date: |
Fri, 17 Jul 2015 15:50:25 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 |
On 17/07/2015 15:35, Marc-André Lureau wrote:
>> > LOG_FD is implemented in the kernel drivers/vhost/vhost.c. It seems to
>> > be an eventfd-like mechanism to save on dirty bitmap scans. However,
>> > it's not well documented how to implement it in a correct way.
> and it's not used by qemu, so hard to say if it actually work well.
>
> > In any case, live migration needs a new message type (like LOG_MMAP_FD)
> > in the vhost-user protocol.
>
> Yes, perhaps with size and offset. I am looking at this.
The offset should be 0...
Do you know the size of the ram_addr_t space from
VHOST_USER_SET_MEM_TABLE's user address and size fields?
If the size isn't needed, you can reuse LOG_BASE, ignoring the content
of the payload and adding the SCM_RIGHTS file descriptor.
Paolo
- Re: [Qemu-devel] [PATCH v4 1/1] vhost user: add support of live migration, Paolo Bonzini, 2015/07/10
- Re: [Qemu-devel] [PATCH v4 1/1] vhost user: add support of live migration, Linhaifeng, 2015/07/12
- Re: [Qemu-devel] [PATCH v4 1/1] vhost user: add support of live migration, Marc-André Lureau, 2015/07/16
- Re: [Qemu-devel] [PATCH v4 1/1] vhost user: add support of live migration, Paolo Bonzini, 2015/07/16
- Re: [Qemu-devel] [PATCH v4 1/1] vhost user: add support of live migration, Marc-André Lureau, 2015/07/17
- Re: [Qemu-devel] [PATCH v4 1/1] vhost user: add support of live migration, Paolo Bonzini, 2015/07/17
- Re: [Qemu-devel] [PATCH v4 1/1] vhost user: add support of live migration, Marc-André Lureau, 2015/07/17
- Re: [Qemu-devel] [PATCH v4 1/1] vhost user: add support of live migration,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH v4 1/1] vhost user: add support of live migration, Marc-André Lureau, 2015/07/17
- Re: [Qemu-devel] [PATCH v4 1/1] vhost user: add support of live migration, Paolo Bonzini, 2015/07/18