On Tue, 2015-10-27 at 00:03 +0200, Petko Manolov wrote:
> On 15-10-26 22:39:28, Dmitry Kasatkin wrote:

> > Can you please still explain when multiple policy writers can content? I 
> > 100% 
> > understand the role of mutex....
> 
> Ignore the high level requirements for the moment.  Every time you have a 
> contended resource you need to protect it from concurrent writers.  IMA 
> policy 
> is read way more frequently than it is been written.  Just once in the past, 
> now 
> a few times more.

Right.  We all agree that only one process can append new rules at a
time.  The open currently fails with -EBUSY.  If the policy isn't being
updated frequently and there isn't any contention for writing the
policy, the question is why change the existing behavior (by defining a
new mutex)?

Mimi

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