lkml.org 
[lkml]   [2012]   [Sep]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] virtio-balloon spec: provide a version of the "silent deflate" feature that works
Il 10/09/2012 03:43, Rusty Russell ha scritto:
>> Now that vfio is upstream and work on qemu integration
>> is being worked on, we might finally see people using this bit
>> to allow memory overcommit with device assignment.
> That was left-field.... so you're saying some guest might pull a page
> from the balloon and DMA to it, and the vfio device needs to know in
> advance that it's going to do it?

Not the vfio device, but the page needs to be pinned with mlock so the
effect is the same.

> But what will we do if the guest doesn't ack the bit?

Just pin the whole memory.

Paolo

> ie. I don't think it can really be optional.



\
 
 \ /
  Last update: 2012-09-10 09:01    [W:0.106 / U:1.548 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site