Re: [PATCH,incomplete] shm integration into shrink_mmap

["Juan J. Quintela" <quintela@fi.udc.es>]

>>>>> "christoph" == Christoph Rohland <cr@sap.com> writes:

Hi christoph

christoph> Here is my first proposal for changing shm to be integrated into
christoph> shrink_mmap.

christoph> It gives you a function 'int shm_write_swap (struct page *page)' to
christoph> write out a page to swap and replace the pte in the shm structures.  I
christoph> tested the stuff with no swapping and it seems stable so far. But
christoph> shm_write_swap is completely untested.

christoph> It probably needs to add the pages in shm_nopage_core to your lru
christoph> queues and of course it needs the calls from shrink_mmap.

christoph> I think it would be nicer to only have a notify function instead of
christoph> shm_write_swap, which gets the page and the swap_entry and can simply
christoph> put the swap_entry into the shm structures without handling the
christoph> swapping at all.

christoph> What do you think?
christoph>         		Christoph

It lacks the cleanup of the SHM page bit :)))
But it looks great so far.  I am working just now it the shrink_mmap
integration.

Later, Juan.

-- 
In theory, practice and theory are the same, but in practice they 
are different -- Larry McVoy
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