* help for dirty bitmap
@ 2015-11-15 5:13 高强
2015-11-16 9:52 ` Ian Campbell
0 siblings, 1 reply; 2+ messages in thread
From: 高强 @ 2015-11-15 5:13 UTC (permalink / raw)
To: xen-devel
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Hi,alls
As we know,xen 4+ maintains a dirty bitmap. Snapshot or migration will
use this bitmap. When the guest domain changes the memory page， VMM can
capture it and set dirty bitmap to 1.
But I can't know how VMM to maintain this dirty bitmap. Under what
circumstances VMM will set the dirty page bitmap to 1, and how to track the
page is be dirty?
Thanks！
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* Re: help for dirty bitmap
2015-11-15 5:13 help for dirty bitmap 高强
@ 2015-11-16 9:52 ` Ian Campbell
0 siblings, 0 replies; 2+ messages in thread
From: Ian Campbell @ 2015-11-16 9:52 UTC (permalink / raw)
To: 高强, xen-devel
On Sun, 2015-11-15 at 13:13 +0800, 高强 wrote:
> Hi,alls
>
> As we know,xen 4+ maintains a dirty bitmap. Snapshot or migration
> will use this bitmap. When the guest domain changes the memory page， VMM
> can capture it and set dirty bitmap to 1.
>
> But I can't know how VMM to maintain this dirty bitmap. Under what
> circumstances VMM will set the dirty page bitmap to 1, and how to track
> the page is be dirty?
The keyword you are looking for is "logdirty". Grepping the source base for
that should get you on the right track.
Ian.
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2015-11-15 5:13 help for dirty bitmap 高强
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