Re: [PATCH 00/32] docs/vm: convert to ReST format

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On Fri, Apr 13, 2018 at 01:21:08PM -0700, Matthew Wilcox wrote:
> On Fri, Apr 13, 2018 at 01:55:51PM -0600, Jonathan Corbet wrote:
> > > I believe that keeping the mm docs together will give better visibility of
> > > what (little) mm documentation we have and will make the updates easier.
> > > The documents that fit well into a certain topic could be linked there. For
> > > instance:
> > 
> > ...but this sounds like just the opposite...?  
> > 
> > I've had this conversation with folks in a number of subsystems.
> > Everybody wants to keep their documentation together in one place - it's
> > easier for the developers after all.  But for the readers I think it's
> > objectively worse.  It perpetuates the mess that Documentation/ is, and
> > forces readers to go digging through all kinds of inappropriate material
> > in the hope of finding something that tells them what they need to know.
> > 
> > So I would *really* like to split the documentation by audience, as has
> > been done for a number of other kernel subsystems (and eventually all, I
> > hope).
> > 
> > I can go ahead and apply the RST conversion, that seems like a step in
> > the right direction regardless.  But I sure hope we don't really have to
> > keep it as an unorganized jumble of stuff...
> 
> I've started on Documentation/core-api/memory.rst which covers just
> memory allocation.  So far it has the Overview and GFP flags sections
> written and an outline for 'The slab allocator', 'The page allocator',
> 'The vmalloc allocator' and 'The page_frag allocator'.  And typing this
> up, I realise we need a 'The percpu allocator'.  I'm thinking that this
> is *not* the right document for the DMA memory allocators (although it
> should link to that documentation).
> 
> I suspect the existing Documentation/vm/ should probably stay as an
> unorganised jumble of stuff.  Developers mostly talking to other MM
> developers.  Stuff that people outside the MM fraternity should know
> about needs to be centrally documented.  By all means convert it to
> ReST ... I don't much care, and it may make it easier to steal bits
> or link to it from the organised documentation.
 
The existing Documentation/vm contains different types of documents. Some
are indeed "Developers mostly talking to other MM developers". Some are
really user/administrator guides. Others are somewhat in between.

I took another look at what's there and I think we can actually move part
of Documentation/vm to Documentation/admin-guide. We can add
Documentation/admin-guide/vm/ and title it "Memory Management Tuning" or
something like that. And several files, e.g. hugetlbpage, ksm, soft-dirty
can be moved there.

-- 
Sincerely yours,
Mike.

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