Re: [PATCH 3/3] mm: Add kernel PTE level pagetable pages account

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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@xxxxxxxxxxxxxxxxx>
> Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>

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?




[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux