Re: Approaches to making io_submit not block

Christoph Hellwig
2011-09-01T16:34:48Z

On Thu, Sep 01, 2011 at 09:31:07AM -0700, Jeremy Allison wrote:
> > We'd define a new O_LOCKS_WHATEVER flag for it, which gets set either
> > using fcntl(..., F_SETFL, ...) or dup3. All in all that should be less
> > than 50 lines of code in the kernel.
>
> Ok, so it'd be set at open() time, say:
>
> O_CLOLOCK_PERSIST
>
> (to match the naming of something like O_CLOEXEC) and be available to set
> with F_SETFD via an fcntl and dup3 call ?

Yes, that's the idea.