Re: [Qemu-devel] An emulation failure occurs, if I hotplug vcpus immediately after the VM start

[Gonglei (Arei)]

> -----Original Message-----
> From: address@hidden [mailto:address@hidden On
> Behalf Of David Hildenbrand
> Sent: Monday, June 11, 2018 8:36 PM
> To: Gonglei (Arei) <address@hidden>; 浙大邮箱 <address@hidden>
> Subject: Re: An emulation failure occurs,if I hotplug vcpus immediately after 
> the
> VM start
> 
> On 11.06.2018 14:25, Gonglei (Arei) wrote:
> >
> > Hi David and Paolo,
> >
> >> -----Original Message-----
> >> From: David Hildenbrand [mailto:address@hidden
> >> Sent: Monday, June 11, 2018 6:44 PM
> >> To: 浙大邮箱 <address@hidden>
> >> Cc: Paolo Bonzini <address@hidden>; Gonglei (Arei)
> >> <address@hidden>; Igor Mammedov <address@hidden>;
> >> xuyandong <address@hidden>; Zhanghailiang
> >> <address@hidden>; wangxin (U)
> >> <address@hidden>; lidonglin <address@hidden>;
> >> address@hidden; address@hidden; Huangweidong (C)
> >> <address@hidden>
> >> Subject: Re: An emulation failure occurs,if I hotplug vcpus immediately 
> >> after
> the
> >> VM start
> >>
> >> On 07.06.2018 18:03, 浙大邮箱 wrote:
> >>> Hi，all
> >>> I still have a question after reading your discussion: Will seabios 
> >>> detect the
> >> change of address space even if we add_region and del_region
> automatically? I
> >> guess that seabios may not take this change into consideration.
> >>
> >> Hi,
> >>
> >> We would just change the way how KVM memory slots are updated. This is
> >> right now not atomic, but would be later on. It should not have any
> >> other effect.
> >>
> > Yes. Do you have any plans to do that?
> 
> Well, I have plans to work on atomically resizable memory regions
> (atomic del + add), and what Paolo described could also work for that
> use case. However, I won't have time to look into that in the near
> future. So if somebody else wants to jump it, perfect. If not, it will
> have to wait unfortunately.
> 
Got it. :)

Thanks,
-Gonglei