Messages in this thread |  | | | From | KOSAKI Motohiro <> | | Subject | Re: [PATCH -mm] vmscan: make mapped executable pages the first class citizen | | Date | Tue, 12 May 2009 12:00:51 +0900 (JST) |
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> side effects > ------------ > > This patch is safe in general, it restores the pre-2.6.28 mmap() behavior > but in a much smaller and well targeted scope. > > One may worry about some one to abuse the PROT_EXEC heuristic. But as > Andrew Morton stated, there are other tricks to getting that sort of boost. > > Another concern is the PROT_EXEC mapped pages growing large in rare cases, > and therefore hurting reclaim efficiency. But a sane application targeted for > large audience will never use PROT_EXEC for data mappings. If some home made > application tries to abuse that bit, it shall be aware of the consequences, > which won't be disastrous even in the worst case.
ok, I lose. if you can post good mesurement result, I'll ack this.
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