Re: [Lhms-devel] Re: [PATCH 2.6.12-rc5 5/10] mm: manual page migration-rc3 -- sys_migrate_pages-mempolicy-migration-rc3.patch

[Ray Bryant <raybry@engr.sgi.com>]

Andi Kleen wrote:

> 
> On the other hand tmpfs is not really memory belonging to a single
> process only so it is not clear if process migration should touch
> should a shared resource.
> 

I think the way this should work is as follows:  if a VMA maps a
shared object, and it meets the criterion for being a migratable
VMA (e. g. vm_write is set), then we migrate the data and the
policy.

This isn't perfect, since pages in the shared object that are not
mapped won't be migrated.  Perhaps we need a utility to fix that
up after the fact.


-- 
Best Regards,
Ray
-----------------------------------------------
                   Ray Bryant
512-453-9679 (work)         512-507-7807 (cell)
raybry@sgi.com             raybry@austin.rr.com
The box said: "Requires Windows 98 or better",
            so I installed Linux.
-----------------------------------------------
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"aart@kvack.org"> aart@kvack.org </a>