Re: [PATCH v2] mm: Track page table modifications in __apply_to_page_range()

[Andrew Morton]

On Fri, 21 Aug 2020 14:37:46 +0200 Joerg Roedel <joro@xxxxxxxxxx> wrote:

> The __apply_to_page_range() function is also used to change and/or
> allocate page-table pages in the vmalloc area of the address space.
> Make sure these changes get synchronized to other page-tables in the
> system by calling arch_sync_kernel_mappings() when necessary.
> 
> Tested-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> #x86-32
> Cc: <stable@xxxxxxxxxxxxxxx> # v5.8+

I'm trying to figure out how you figured out that this is 5.8+.  Has a
particular misbehaving commit been identified?