Re: [mm][RFC][PATCH 0/11] mm accessor updates.

[Avi Kivity]

On 12/18/2009 07:17 AM, Ingo Molnar wrote:
> > It is not about naming. The accessors hide the locking mechanism for
> > mmap_sem. Then you can change the locking in a central place.
> >
> > The locking may even become configurable later. Maybe an embedded solution
> > will want the existing scheme but dual quad socket may want a distributed
> > reference counter to avoid bouncing cachelines on faults.
> >      
> Hiding the locking is pretty much the worst design decision one can make.
>
>    

It does allow incremental updates.  For example if we go with range 
locks, the accessor turns into a range lock of the entire address space; 
users can be converted one by one to use their true ranges in order of 
importance.

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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