Re: [PATCH v7 1/1] mm/page_alloc.c: refactor initialization of struct page for holes in memory layout
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: 2021-02-25 18:05:39
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On Thu, Feb 25, 2021 at 9:07 AM Mike Rapoport [off-list ref] wrote:
quoted
We might still double-initialize PFNs when two zones overlap within a section, correct?You mean that a section crosses zones boundary? I don't think it's that important.
What if there was a memory allocation in between that could allocate
the once-initialized page?
Maybe it can't happen, or is not an issue for some other reason, but
this code has been fragile and had a ton of subtle issues, so maybe
worth documenting (or explaining here why it's just not relevant)
Linus