Re: RCU issue with SELinux (Re: SELINUX performance issues)

[Luke Kenneth Casson Leighton <lkcl@lkcl.net>]

On Fri, Aug 20, 2004 at 10:36:03PM +0900, Kaigai Kohei wrote:
> Hello, everyone.
> 
> Tuesday, August 17, 2004 12:19 AM
> James Morris wrote:
> > > Is removing direct reference to AVC-Entry approach acceptable?
> > > 
> > > I'll try to consider this issue further.
> > 
> > Sure, if you can make it work without problems.
> 
> The attached patches against to 2.6.8.1 kernel improve the performance
> and the scalability of SELinux by RCU-approach.
> 
> The evaluation results are as follows:
> <Environment>
> CPU: Itanium2(1GHz) x 4/8/16/32
> Memory: enough (no swap)
> OS: 2.6.8.1 (SELinux disabled by 'selinux=0' boot option)
>     2.6.8.1 (SELinux enabled)
>     2.6.8.1 + rwlock patch by KaiGai
>     2.6.8.1 + RCU patch by KaiGai
> 
> The test program iterates write() to files on tmpfs 500,000 times in parallel.
                                                ^^^^^
 i presume that that is without the xattr patch which adds extended
 attributes to tmpfs?

 (see http://hands.com/~lkcl/selinux)

 l.


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