Re: [v9.1] sepgsql - userspace access vector cache

On Fri, Aug 26, 2011 at 5:32 AM, Kohei KaiGai <kaigai(at)kaigai(dot)gr(dot)jp> wrote:
> Yes. It also caches an expected security label when a client being
> labeled as "scontext" tries to execute a procedure being labeled as
> "tcontext", to reduce number of system call invocations on fmgr_hook
> and needs_fmgr_hook.
> If the expected security label is not same with "scontext", it means
> the procedure performs as a trusted procedure that switches security
> label of the client during its execution; like a security invoker
> function.
> A pair of security labels are the only factor to determine whether the
> procedure is a trusted-procedure, or not. Thus, it is suitable to
> cache in userspace avc.

I've committed this, but I still think it would be helpful to revise
that comment. The turn "boosted up" is not very precise or
informative. Could you submit a separate, comment-only patch to
improve this?

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company