Re: [RFC PATCH] introduce sys_membarrier(): process-wide memory barrier (v5)

Nicholas Miell
2010-01-13T18:41:46Z

On Wed, 2010-01-13 at 13:24 -0500, Mathieu Desnoyers wrote:
> * Nicholas Miell (nmiell@comcast.net) wrote:
>
> > The whole point of compat and incompat flags is that it allows new
> > applications to run on old kernels and either work or fail as
> > appropriate, depending on whether the new features they're using must be
> > implemented or can be silently ignored.
>
> I see. Thanks for the explanation. Then the expedited flag should
> clearly be part of the mandatory flags.
>
> Can you point me to other system calls that are doing this ?
>
> Thanks,
>
> Mathieu

Not off the top of my head, but I did steal the idea from the ext2/3/4
disk format.

--
Nicholas Miell <nmiell@comcast.net>