Re: [PATCH] Futex Generalization Patch

[Rusty Russell]

In message <[e-mail]> you write:
> --) There is more overhead in the wakeup and the wait because I need to 
>      move from the fd to the filestruct which is always some lookup and
>      I have to verify that the file descriptor is actually a valid /dev/futex
>      file (yikes).    

Hmmm... verify on the FUTEX_AWAIT: you can maybe hold the struct file
directly (or maybe not).

> In FUTEX_AWAIT  inteprest it as { short fd, short sig };
> There should be no limitation by casting it to shorts ?

No, that's bad.  But I thought there was already a way to set what
signal occurred instead of SIGIO.  Is that not per-fd?

Rusty.
--
  Anyone who quotes me in their sig is an idiot. -- Rusty Russell.