Re: [PATCH 1/2] mm: Add kernel MMU notifier to manage IOTLB/DEVTLB

[Dave Hansen]

On 12/13/2017 07:38 PM, Lu Baolu wrote:
> 2. When vmalloc/vfree interfaces are called, the page mappings
>     for kernel memory might get changed. And current code calls
>     flush_tlb_kernel_range() to flush CPU TLBs only. The IOTLB or
>     DevTLB will be stale compared to that on the cpu for kernel
>     mappings.

What's the plan to deal with all of the ways other than vmalloc() that
the kernel changes the page tables?