mm: zswap: move more same-filled pages checks outside of zswap_store()

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Currently, zswap_store() checks zswap_same_filled_pages_enabled, kmaps the
folio, then calls zswap_is_page_same_filled() to check the folio contents.
Move this logic into zswap_is_page_same_filled() as well (and rename it
to use 'folio' while we are at it).

This makes zswap_store() cleaner, and makes following changes to that
logic contained within the helper.

While we are at it:
- Rename the insert_entry label to store_entry to match xa_store().
- Add comment headers for same-filled functions and the main API
  functions (load, store, invalidate, swapon, swapoff).

No functional change intended.

Link: https://lkml.kernel.org/r/20240413022407.785696-4-yosryahmed@google.com
Signed-off-by: Yosry Ahmed <yosryahmed@google.com>
Reviewed-by: Nhat Pham <nphamcs@gmail.com>
Reviewed-by: Chengming Zhou <chengming.zhou@linux.dev>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Maciej S. Szmigiero" <mail@maciej.szmigiero.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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Yosry Ahmed 2024-04-13 02:24:06 +00:00 • committed by Andrew Morton

parent 82e0f8e47b

commit e87b881489

1 changed files with 25 additions and 20 deletions

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mm/zswap.c

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