Messages in this thread | | | Date | Fri, 9 Feb 2018 07:26:09 +0300 | From | "Kirill A. Shutemov" <> | Subject | Re: [RFC] Limit mappings to ten per page per process |
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On Thu, Feb 08, 2018 at 01:37:43PM -0800, Matthew Wilcox wrote: > On Thu, Feb 08, 2018 at 12:21:00PM -0800, Matthew Wilcox wrote: > > Now that I think about it, though, perhaps the simplest solution is not > > to worry about checking whether _mapcount has saturated, and instead when > > adding a new mmap, check whether this task already has it mapped 10 times. > > If so, refuse the mapping. > > That turns out to be quite easy. Comments on this approach?
This *may* break some remap_file_pages() users.
And it may be rather costly for popular binaries. Consider libc.so.
-- Kirill A. Shutemov
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