Linux-kernel mailing list archive 1999-34,: Re: Async user space notification from kernel?

# Re: Async user space notification from kernel?

H. Peter Anvin (hpa@transmeta.com)
27 Aug 1999 06:35:32 GMT

- Messages sorted by: [ date ][ thread ][ subject ][ author ]
- Next message: Rogier Wolff: "Re: Cache incoherencies"
- Previous message: Rui Sousa: "Re: problem in compiling /linux/arch/i386/kernel/io_apic.c"
- Maybe in reply to: Erik Andersen: "Async user space notification from kernel?"

Followup to: <19990826120820.A5360@xmission.com>
By author: Erik Andersen <andersen@xmission.com>
In newsgroup: linux.dev.kernel
>
> On Thu, Aug 26, 1999 at 12:54:35PM -0400, Jeff Garzik wrote:
> > Erik Andersen wrote:
> > > Select(2) on /proc is indeed disappointing -- it does nothing
> > > useful.
> >
> > I still wonder if this is because 'read' is the only proc operation that
> > is filled in... All of the net routines share
> > 'proc_net_inode_operations'.
> >
> > Jeff
>
> Ok, I follow you now -- select(2) depends on certain fs file
> operations that no /proc entries currently provide. By adjusting the
> file_operations, and providing some needed magic, I could indeed use
> select on a /proc entry to get async event notification to user space.
> That would be a very elegant solution.
>
> Any hints as to what file_ops are needed to support select?
> Clearly read and write are not sufficient. flush? poll?
>

poll.

-hpa

    --
    <hpa@transmeta.com> at work, <hpa@zytor.com> in private!

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.rutgers.edu
    Please read the FAQ at http://www.tux.org/lkml/

- Next message: Rogier Wolff: "Re: Cache incoherencies"
- Previous message: Rui Sousa: "Re: problem in compiling /linux/arch/i386/kernel/io_apic.c"
- Maybe in reply to: Erik Andersen: "Async user space notification from kernel?"