Re: [PATCH v5 12/18] x86/sgx: Add EPC OOM path to forcefully reclaim EPC

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On Mon, 16 Oct 2023 16:09:52 -0500, Huang, Kai <kai.huang@xxxxxxxxx> wrote:
[...]

still need to fix the bug mentioned above here.

I really think you should just go this simple way:

When you want to take EPC back from VM, kill the VM.


My only concern is that this is a compromise due to current limitation (no other sane way to take EPC from VMs). If we define this behavior and it becomes a contract to user space, then we can't change in future.

On the other hand, my understanding the reason you want this behavior is to enforce EPC limit at runtime. I just not sure how important it is and if it is a real usage given all limitations of SGX VMs we have (static EPC size, no migration).

Thanks

Haitao



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