Messages in this thread | | | Date | Mon, 23 Jun 2014 13:28:20 -0700 | From | Dave Hansen <> | Subject | Re: [PATCH v6 02/10] x86, mpx: add MPX specific mmap interface |
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On 06/23/2014 01:06 PM, Andy Lutomirski wrote: > Can the new vm_operation "name" be use for this? The magic "always > written to core dumps" feature might need to be reconsidered.
One thing I'd like to avoid is an MPX vma getting merged with a non-MPX vma. I don't see any code to prevent two VMAs with different vm_ops->names from getting merged. That seems like a bit of a design oversight for ->name. Right?
Thinking out loud a bit... There are also some more complicated but more performant cleanup mechanisms that I'd like to go after in the future. Given a page, we might want to figure out if it is an MPX page or not. I wonder if we'll ever collide with some other user of vm_ops->name. It looks fairly narrowly used at the moment, but would this keep us from putting these pages on, say, a tmpfs mount? Doesn't look that way at the moment.
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