Re: Approaches to making io_submit not block

Jeremy Allison
2011-09-01T16:57:22Z

On Thu, Sep 01, 2011 at 12:45:54PM -0400, Christoph Hellwig wrote:
> On Thu, Sep 01, 2011 at 09:34:52AM -0700, Jeremy Allison wrote:
> > >
> > > (to match the naming of something like O_CLOEXEC) and be available to set
> > > with F_SETFD via an fcntl and dup3 call ?
> >
> > Ah, looking at fcntl - do you want to set/get this via F_SETFD/F_GETFD,
> > or via F_SETFL/F_GETFL ? i.e. is this a file descritor flag, or a status
> > flag ? I'd guess a file descriptor flag but I'm not sure of the difference
> > here..
>
> F_SETFD/F_GETFD operates on an entry in the fd table, e.g. separately
> if you have duped fds. That's exactly what we do _not_ want here.

Ah, ok - I understand the difference now. So it's a status flag
get/set with F_SETFL/F_GETFL.

Ok, that works for me. Get me a patch in the kernel and I'll code
up the Samba changes very shortly (actually should be quite
easy :-).

Jeremy.