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 xPRHUg5p 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000003, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Nov 08, 2024 at 12:29:15PM +0000, Lorenzo Stoakes wrote: > On Fri, Nov 08, 2024 at 07:25:38PM +0700, Bagas Sanjaya wrote: > > On Thu, Nov 07, 2024 at 07:01:37PM +0000, Lorenzo Stoakes wrote: > > > +.. note:: In instances where the architecture supports fewer page tables than > > > + five the kernel cleverly 'folds' page table levels, that is skips them within > > > + the logic, regardless we can act as if there were always five. > > > > What are being skipped if e.g. we only have 3 or 4 page tables? > > > > Confused... > > Page table levels, see [0]. > > Typically achieved through stubbing functions out, etc. So in the code you > actually write and _conceptually_ there are five levels, only in the final > compile you might have things like p4d_present(), p4d_clear() etc. squashed by > the compiler into nothing. I have updated this note to be a little clearer and to explicitly state this. Thanks! > > I don't want to get too bogged down into the details of this in the doc, more of > an aside! > > [0]: https://elixir.bootlin.com/linux/v6.11.6/source/include/asm-generic/pgtable-nopud.h#L9 > > > > > -- > > An old man doll... just what I always wanted! - Clara