On Wed, Jul 06, 2022 at 04:59:17PM +0800, Baolin Wang wrote:

Now the kernel PTE level ptes are always protected by mm->page_table_lock
instead of split pagetable lock, so the kernel PTE level pagetable pages
are not accounted. Especially the vmalloc()/vmap() can consume lots of
kernel pagetable, so to get an accurate pagetable accounting, calling new
helpers page_{set,clear}_pgtable() when allocating or freeing a kernel
PTE level pagetable page.

Meanwhile converting architectures to use corresponding generic PTE pagetable
allocation and freeing functions.

Note this patch only adds accounting to the page tables allocated after boot.

Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reported-by: kernel test robot <redacted>

What does this Reported-by: even mean?  the kernel test robot told you
that the page tables weren't being accounted?

I don't understand why we want to start accounting kernel page tables.
an we have a *discussion* about that with a sensible thread name instead
of just trying to sneak it in as patch 3/3?

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