[Pvfs2-developers] the epoll()-by-default experiment is a bust

[Rob Ross]

why don't we add a configure test that executes code to see if we get 
ENOSYS?

rob

Robert Latham wrote:
> Hi
> 
> yesterday I made pvfs2 use epoll(), when configure detects support for
> it, the default.   That works out well for 2.6 systems, but less well
> on 2.4 (in particular, Jazz and Pete's OSC clusters) where the
> configure-time test finds epoll support, but at runtime we get
> "epoll_create(): Function not Implemented".  
> 
> So i'm reverting my changes, and adding this note for posterity:  we
> probably won't be able to make --enable-epoll the default as long as
> we have linux-2.4 users.   
> 
> ==rob
>