[PATCH] Enhance time sampling of async IO VFS functions

[Volker Lendecke]

On Fri, Feb 26, 2016 at 09:56:58PM +0100, Ralph Boehme wrote:
> On Fri, Feb 26, 2016 at 10:45:31AM -0800, Jeremy Allison wrote:
> > On Fri, Feb 26, 2016 at 06:39:36PM +0100, Ralph Boehme wrote:
> > > I though about adding struct tevent_req.async.(uint64_t)duration and
> > > getter/setter functions
> > > tevent_req_set_duration()/tevent_req_get_duration().
> > > 
> > > This could then be used by the implementation of an async request to
> > > set the duration and the caller can read it, further passing up the
> > > stack and processing as needed.
> > 
> > If we want to make this a generic feature of tevent, then
> > the above is the way to go - but I think that needs a bigger
> > discussion than just you and I.
> > 
> > Metze, Volker - what do you think about adding duration
> > as a feature to tevent_req.async ?
> 
> something like this.

Is it theoretically possible to implement this feature without modifying
tevent, just within asys.c? Apologies for not coming up with a polished
proposal mself, but I would like to avoid bloat in such a central
structure if possible.

Sorry, Volker

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