[Pvfs2-developers] patch: alternate AIO implementation

[Phil Carns]

Murali Vilayannur wrote:
> Nice investigation Phil!
> Results look great. Isnt this approach similar to what Julian was doing
> with the threaded I/O work in the kunkel branch? (with the exception of
> the O_DIRECT stuff?)

I'm not sure- I haven't actually been following those commits that 
closely yet.  This is something we just cobbled together a while back as 
an experiment but weren't really sure if it was useful at the time (it 
failed to fix a different problem that we were looking at which later 
ended up being a kernel bug).  We only yesterday ran tests that showed 
it being helpful for a real world scenario.

> It also looks like the trove backend could benefit from the readx, writex
> posix extension patches to the kernel and ext3, although that would be a
> lot of work I guess..

Yeah, probably so.  I doubt we will be able to work with it in our 
environment until some of the major vendors ship kernels with 
readx/writex available...

-Phil