Re: Kernel patches enabling better POSIX AIO (Was Re: [3/4] kevent: AIO, aio_sendfile)

On Mon, 2006-08-14 at 09:38 -0700, Ulrich Drepper wrote:
> Suparna Bhattacharya wrote:
> > Is there a (remote) possibility that the thread could have died and its
> > pid got reused by a new thread in another process ? Or is there a mechanism
> > that prevents such a possibility from arising (not just in NPTL library,
> > but at the kernel level) ?
> 
> The UID/GID won't help you with dying processes.  What if the same user
> creates a process with the same PID?  That process will not expect the
> notification and mustn't receive it.  If you cannot detect whether the
> issuing process died you have problems which cannot be solved with a
> uid/gid pair.
> 
> 

Eric W. Biederman sent a series of patches that introduced a struct
task_ref specifically to solve this sort of problem on January 28 of
this year, but I don't think it went anywhere.


-- 
Nicholas Miell <[email protected]>

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• References:
  • Re: [3/4] kevent: AIO, aio_sendfile() implementation.
    • From: Sébastien Dugué <[email protected]>
  • Re: [3/4] kevent: AIO, aio_sendfile() implementation.
    • From: Badari Pulavarty <[email protected]>
  • Re: [3/4] kevent: AIO, aio_sendfile() implementation.
    • From: Zach Brown <[email protected]>
  • Re: [3/4] kevent: AIO, aio_sendfile() implementation.
    • From: Badari Pulavarty <[email protected]>
  • Re: [3/4] kevent: AIO, aio_sendfile() implementation.
    • From: Ulrich Drepper <[email protected]>
  • Re: [3/4] kevent: AIO, aio_sendfile() implementation.
    • From: Badari Pulavarty <[email protected]>
  • Re: [3/4] kevent: AIO, aio_sendfile() implementation.
    • From: Sébastien Dugué <[email protected]>
  • Re: [3/4] kevent: AIO, aio_sendfile() implementation.
    • From: Ulrich Drepper <[email protected]>
  • Kernel patches enabling better POSIX AIO (Was Re: [3/4] kevent: AIO, aio_sendfile)
    • From: Suparna Bhattacharya <[email protected]>
  • Re: Kernel patches enabling better POSIX AIO (Was Re: [3/4] kevent: AIO, aio_sendfile)
    • From: Ulrich Drepper <[email protected]>
  • Re: Kernel patches enabling better POSIX AIO (Was Re: [3/4] kevent: AIO, aio_sendfile)
    • From: Suparna Bhattacharya <[email protected]>
  • Re: Kernel patches enabling better POSIX AIO (Was Re: [3/4] kevent: AIO, aio_sendfile)
    • From: Ulrich Drepper <[email protected]>

• Prev by Date: Re: vga text console
• Next by Date: Re: [RFC] [PATCH] file posix capabilities
• Previous by thread: Re: Kernel patches enabling better POSIX AIO (Was Re: [3/4] kevent: AIO, aio_sendfile)
• Next by thread: Re: Kernel patches enabling better POSIX AIO (Was Re: [3/4] kevent: AIO, aio_sendfile)
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]