| From | David Howells <> | Subject | Re: [PATCH v4 02/28] mm: Add an unlock function for PG_private_2/PG_fscache | Date | Tue, 16 Mar 2021 20:38:00 +0000 |
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Matthew Wilcox <willy@infradead.org> wrote:
> So ... a page with both flags cleared should have a refcount of N. > A page with one or both flags set should have a refcount of N+1. > ... > How is a poor filesystem supposed to make that true? Also btrfs has this > problem since it uses private_2 for its own purposes.
It's simpler if it's N+2 for both patches set. Btw, patch 13 adds that - and possibly that should be merged into an earlier patch.
David
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