Re: [PATCH] Initial support for struct vfs_cred [0/1]

[Daniel Phillips <phillips@arcor.de>]

On Sunday 01 September 2002 01:13, Luca Barbieri wrote:
> On Sun, 2002-09-01 at 00:30, Trond Myklebust wrote:
> > >>>>> " " == Luca Barbieri <ldb@ldb.ods.org> writes:
> > 
> >      > Then the rest of the code doesn't need to know at all that
> >      > credentials are shared and is simpler and faster.  We have
> >      > however a larger penalty on credential change but, as you say,
> >      > that's extremely rare (well, perhaps not necessarily extremely,
> >      > but still rare).
> > 
> > What if I, in a fit of madness/perversion, decide to use CLONE_CRED
> > between 2 kernel threads (i.e. no 'kernel entry')?
> You don't or you manually patch the task_struct of the other threads.
> This isn't a serious concern.

It is a serious concern.  Inventing new, subtle behavior differences 
between user and kernel threads is, in a word, gross.  It's certain
to bite people in the future.

-- 
Daniel