Re: [Xen-devel] [PATCH] switch rangeset's lock to rwlock

[Tim Deegan <tim@xxxxxxx>]

At 13:15 +0100 on 18 Sep (1411042524), Jan Beulich wrote:
> >>> On 18.09.14 at 12:43, <tim@xxxxxxx> wrote:
> > At 13:55 +0100 on 12 Sep (1410526507), Jan Beulich wrote:
> >> As a general library routine, it should behave as efficiently as
> >> possible, even if at present no significant contention is known here.
> >> 
> >> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> >> ---
> >> With the widened use of rangesets I'd like to re-suggest this change
> >> which I had posted already a couple of years back.
> > 
> > Is this addressing an actual (measured) problem or just seems like a
> > good idea?  If the latter maybe keep it until after 4.5?
> 
> The latter. And yes, I have no problem keeping it until after 4.5,
> it's just that the multi-ioreq-server's extended use of rangesets
> (as said elsewhere) would seem to make this a reasonable fit for
> 4.5.

Well, I think it's a question for the release manager, then. :)

I wouldn't be inclined to tinker with them unless we had a measurement
justifying the change.  After all, the rangeset operations are not
long-running ones and we'd be adding some overhead.

Tim.

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