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SubjectRe: [PATCH v2] mm: Track page table modifications in __apply_to_page_range()
On Fri, 21 Aug 2020 14:37:46 +0200 Joerg Roedel <> 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.

There's no description here of the user-visible effects of the bug.
Please always provide this, especially when proposing a -stable
backport. Take pity upon all the downstream kernel maintainers who are
staring at this wondering whether they should risk adding it to their

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