Messages in this thread | | | Date | Tue, 11 Mar 2008 10:36:46 -0700 | From | Greg KH <> | Subject | Re: [PATCH 5/9] Make use of permissions, returned by kobj_lookup |
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On Tue, Mar 11, 2008 at 12:57:55PM +0300, Pavel Emelyanov wrote: > > Besides, I've measured some things - the lat_syscall test for open from > lmbench test suite and the nptl perf test. Here are the results: > > sec nosec > open 3.0980s 3.0709s > nptl 2.7746s 2.7710s > > So we have 0.88% loss in open and ~0.15% with nptl. I know, this is not that > much, but it is noticeable. Besides, this is only two tests, digging deeper > may reveal more.
I think that is in the noise of sampling if you run that test many more times.
> Let alone the fact that simply turning the CONFIG_SECURITY to 'y' puts +8Kb > to the vmlinux... > > I think, I finally agree with you and Al Viro, that the kobj mapper is > not the right place to put the filtering, but taking the above numbers > into account, can we put the "hooks" into the #else /* CONFIG_SECURITY */ > versions of security_inode_permission/security_file_permission/etc?
Ask the security module interface maintainers about this, not me :)
good luck,
greg k-h
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