Re: [Xen-devel] Xen 4.7 Development Update

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Jan Beulich [mailto:JBeulich@xxxxxxxx]
> Sent: 02 March 2016 14:21
> To: Paul Durrant
> Cc: Wei Liu; xen-devel; George Dunlap
> Subject: RE: [Xen-devel] Xen 4.7 Development Update
> 
> >>> On 02.03.16 at 15:07, <Paul.Durrant@xxxxxxxxxx> wrote:
> >>  -----Original Message-----
> >> From: Xen-devel [mailto:xen-devel-bounces@xxxxxxxxxxxxx] On Behalf Of
> Jan
> >> Beulich
> >> Sent: 02 March 2016 13:33
> >> To: George Dunlap
> >> Cc: xen-devel; Wei Liu
> >> Subject: Re: [Xen-devel] Xen 4.7 Development Update
> >>
> >> >>> On 02.03.16 at 12:38, <dunlapg@xxxxxxxxx> wrote:
> >> > On Mon, Feb 29, 2016 at 11:17 AM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
> >> >> *  Improve ioreq server performance
> >> >>   -  Yu Zhang
> >> >>   -  Paul Durrant
> >> >
> >> > If this means "use RB trees for rangesets", I think this is already in.
> >>
> >> No, it's not. There was no point in committing that one without
> >> the patch actually needing it.
> >>
> >
> > Using RB trees vs. a linear walk is still an improvement so I see no harm in
> > committing it.
> 
> But the individual nodes (and hence the overall resource use)
> grow, and whether that is worth the presumably tiny win on
> lookups I'm not at all certain.
> 

Ok. Your call but I would have thought the increased resource use was small 
enough to not worry about.. it must be in the order of kilobytes, if that.

  Paul

> Jan


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