On Thu, 2006-04-20 at 08:21 -0500, Serge E. Hallyn wrote:
> Tony, do you have any performance measurements? Both for unconfined and
> confined apps? Presumably unconfined processes should have 0 performance
> hit, right?
Preferably something that exercises open, mkdir, link... and friends
intensively, not just the old WebStone data that I've seen posted
before.
But you don't really need the benchmarks - just look at the code, and
think about the implications of allocating a page and calling d_path on
every permission(9) call (on every component) plus from the separate
hooks in the vfs_ helpers and further consider the impact of taking the
dcache lock all the time there. And look at the iterators being used in
aa_perm_dentry as well as the truly fun ones in aa_link. All because
they are doing it from LSM hooks that were never intended to be used
this way.
--
Stephen Smalley
National Security Agency
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