Messages in this thread | | | Date | Wed, 26 Sep 2012 10:44:32 -0700 | Subject | Re: [PATCH v3 04/13] kmem accounting basic infrastructure | From | Tejun Heo <> |
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Hello, Glauber.
On Wed, Sep 26, 2012 at 10:36 AM, Glauber Costa <glommer@parallels.com> wrote: > This was discussed multiple times. Our interest is to preserve existing > deployed setup, that were tuned in a world where kmem didn't exist. > Because we also feed kmem to the user counter, this may very well > disrupt their setup.
So, that can be served by .kmem_accounted at root, no?
> User memory, unlike kernel memory, may very well be totally in control > of the userspace application, so it is not unreasonable to believe that > extra pages appearing in a new kernel version may break them. > > It is actually a much worse compatibility problem than flipping > hierarchy, in comparison
Again, what's wrong with one switch at the root?
Thanks.
-- tejun
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