Re: [PATCH] l1tf: drop the swap storage limit restriction when l1tf=off

[Andi Kleen]

On Tue, Nov 13, 2018 at 07:49:10PM +0100, Michal Hocko wrote:
> From: Michal Hocko <mhocko@xxxxxxxx>
> 
> Swap storage is restricted to max_swapfile_size (~16TB on x86_64)
> whenever the system is deemed affected by L1TF vulnerability. Even
> though the limit is quite high for most deployments it seems to be
> too restrictive for deployments which are willing to live with the
> mitigation disabled.
> 
> We have a customer to deploy 8x 6,4TB PCIe/NVMe SSD swap devices
> which is clearly out of the limit.
> 
> Drop the swap restriction when l1tf=off is specified. It also doesn't
> make much sense to warn about too much memory for the l1tf mitigation
> when it is forcefully disabled by the administrator.

Reviewed-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>

-Andi