Messages in this thread | | | Date | Tue, 2 Dec 2014 13:30:14 +0200 | From | "Kirill A. Shutemov" <> | Subject | Re: [RFC V2] mm:add zero_page _mapcount when mapped into user space |
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On Tue, Dec 02, 2014 at 05:27:36PM +0800, Wang, Yalin wrote: > This patch add/dec zero_page's _mapcount to make sure > the mapcount is correct for zero_page, > so that when read from /proc/kpagecount, zero_page's > mapcount is also correct, userspace process like procrank can > calculate PSS correctly.
I don't have specific code path to point to, but I would expect zero page with non-zero mapcount would cause a problem with rmap.
How do you test the change?
-- Kirill A. Shutemov
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