Re: [take28-resend_1->0 0/8] kevent: Generic event handling mechanism.

[Evgeniy Polyakov <johnpol@2ka.mipt.ru>]

On Thu, Dec 21, 2006 at 11:42:04AM -0500, jamal (hadi@cyberus.ca) wrote:
> > > > Things like sockets/pipes can only benefit from direct kevent usage 
> > > > instead of ->poll() and wrappers.
> > > 
> > > You should be able change it to use those schemes when it detects
> > > that the kernel supports them.
> > 
> > I.e. stat() for each new file descriptor - note, that _you_ asked it :)
> 
> Didnt follow. Is there some issue with libevent you mean? 

libevent provides file descriptor without any additional info about it -
so when it is added into the waiting subsystem, userspace must select
different usage cases (i.e. different kevent notifications for different
types of file descriptor - socket notifications for sockets and pipes,
poll/select for all others), this requires stat() call per provided file
descriptor.

Event addition/waiting itself is the same - only parameters (type and
requested event) are changed.

> cheers,
> jamal

-- 
	Evgeniy Polyakov
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