Messages in this thread | | | Date | Thu, 04 Jun 2015 11:41:46 -0700 | From | Dave Hansen <> | Subject | Re: [RFC PATCH 08/12] mm: use mirrorable to switch allocate mirrored memory |
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On 06/04/2015 06:02 AM, Xishi Qiu wrote: > Add a new interface in path /proc/sys/vm/mirrorable. When set to 1, it means > we should allocate mirrored memory for both user and kernel processes.
That's a pretty dangerously short name. :)
How would this end up getting used? It seems like it would be dangerous to use once userspace was very far along. So would the kernel set it to 1 and then let (early??) userspace set it back to 0? That would let important userspace like /bin/init get mirrored memory without having to actually change much in userspace.
This definitely needs some good documentation.
Also, if it's insane to turn it back *on*, maybe it should be a one-way trip to turn off.
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