Re: [PATCH v6 04/12] Add memory slot versioning and use it to provide fast guest write interface

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From: Avi Kivity

Subject: Re: [PATCH v6 04/12] Add memory slot versioning and use it to provide fast guest write interface

Date: Sunday, October 10, 2010 - 5:48 am

On 10/07/2010 07:23 PM, Gleb Natapov wrote:
quoted text> On Thu, Oct 07, 2010 at 06:20:53PM +0200, Avi Kivity wrote:
> >   On 10/07/2010 06:03 PM, Gleb Natapov wrote:
> >  >>   >
> >  >>   >   Isn't SET_USER_MEMORY_REGION so slow that calling it 2^32 times
> >  >>   >   isn't really feasible?
> >  >>
> >  >>   Assuming it takes 1ms, it would take 49 days.
> >  >>
> >  >We may fail ioctl when max value is reached. The question is how much slot
> >  >changes can we expect from real guest during its lifetime.
> >  >
> >
> >  A normal guest has a 30 Hz timer for reading the vga framebuffer,
> >  multiple slots.  Let's assume 100 Hz frequency, that gives 490 days
> >  until things stop working.
> >
> And reading vga framebuffer needs slots changes because of dirty map
> tracking?

Yes.

-- 
error compiling committee.c: too many arguments to function

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Messages in current thread:

[PATCH v6 04/12] Add memory slot versioning and use it to ..., Gleb Natapov, (Mon Oct 4, 8:56 am)

Re: [PATCH v6 04/12] Add memory slot versioning and use it ..., Rik van Riel, (Mon Oct 4, 6:29 pm)

Re: [PATCH v6 04/12] Add memory slot versioning and use it ..., Marcelo Tosatti, (Tue Oct 5, 9:57 am)

Re: [PATCH v6 04/12] Add memory slot versioning and use it ..., Gleb Natapov, (Wed Oct 6, 4:14 am)

Re: [PATCH v6 04/12] Add memory slot versioning and use it ..., Marcelo Tosatti, (Wed Oct 6, 7:38 am)

Re: [PATCH v6 04/12] Add memory slot versioning and use it ..., Gleb Natapov, (Wed Oct 6, 1:08 pm)

Re: [PATCH v6 04/12] Add memory slot versioning and use it ..., Avi Kivity, (Thu Oct 7, 3:00 am)

Re: [PATCH v6 04/12] Add memory slot versioning and use it ..., Avi Kivity, (Thu Oct 7, 5:31 am)

Re: [PATCH v6 04/12] Add memory slot versioning and use it ..., Marcelo Tosatti, (Thu Oct 7, 8:42 am)

Re: [PATCH v6 04/12] Add memory slot versioning and use it ..., Gleb Natapov, (Thu Oct 7, 9:03 am)

Re: [PATCH v6 04/12] Add memory slot versioning and use it ..., Avi Kivity, (Thu Oct 7, 9:20 am)

Re: [PATCH v6 04/12] Add memory slot versioning and use it ..., Gleb Natapov, (Thu Oct 7, 10:23 am)

Re: [PATCH v6 04/12] Add memory slot versioning and use it ..., Avi Kivity, (Sun Oct 10, 5:48 am)


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