RE: [PATCH v10 09/10] mm: stop zeroing memory during allocation in vmemmap

From: David Laight
Date: Fri Oct 06 2017 - 07:11:35 EST

From: Pavel Tatashin
> Sent: 05 October 2017 22:11
> vmemmap_alloc_block() will no longer zero the block, so zero memory
> at its call sites for everything except struct pages. Struct page memory
> is zero'd by struct page initialization.

It seems dangerous to change an allocator to stop zeroing memory.
It is probably saver to add a new function that doesn't zero
the memory and use that is the places where you don't want it
to be zeroed.