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Walleij: ARM32 page tables

([Kernel] Oct 26, 2020 16:06 UTC (Mon) (corbet))


Linus Walleij continues his series of blog posts on the 32-bit Arm kernel with [1]this detailed description about how page tables work . " The Linux kernel will act as if 5 levels of page tables exist. This is of course grossly over-engineered for ARM32 which has 2 or 3 levels of page tables, but we need to cater for the rest of the world. One size fits all. In practice, the code is organized such that these page tables 'fold' and we mostly skip over the intermediate translation steps when possible. "



[1] https://people.kernel.org/linusw/arm32-page-tables

My love runs by like a day in June,
And he makes no friends of sorrows.
He'll tread his galloping rigadoon
In the pathway or the morrows.
He'll live his days where the sunbeams start
Nor could storm or wind uproot him.
My own dear love, he is all my heart --
And I wish somebody'd shoot him.
-- Dorothy Parker, part 3