linux-kernel - [PATCH v2 0/2] mm/page_alloc: Some clarifications for migratetype fallback

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Message-ID: <20250224-clarify-steal-v2-0-be24da656764@google.com>
Date: Mon, 24 Feb 2025 12:37:27 +0000
From: Brendan Jackman <jackmanb@...gle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Vlastimil Babka <vbabka@...e.cz>, Mel Gorman <mgorman@...hsingularity.net>, 
	Michal Hocko <mhocko@...nel.org>, Johannes Weiner <hannes@...xchg.org>, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org, Brendan Jackman <jackmanb@...gle.com>, 
	Yosry Ahmed <yosry.ahmed@...ux.dev>
Subject: [PATCH v2 0/2] mm/page_alloc: Some clarifications for migratetype fallback

A couple of patches to try and make the code easier to follow.

As discussed on the v1 thread [0] there are additional cleanups that can
be done here, but Johannes is already working on those. These ones are
just fiddling with the code to make it more readable, with no
behavioural change.

Note there's also a proposal from Vlastimil[1] to rework the interface
which is renamed here to should_claim_block(), I have not adopted that
suggestion yet but I could still be persuaded to do so.

[0] https://lore.kernel.org/r/20250214-clarify-steal-v1-1-79dc5adf1b79@google.com

[1] https://lore.kernel.org/all/764394d9-592c-4d68-8910-67362dd8810a@suse.cz/#t

Signed-off-by: Brendan Jackman <jackmanb@...gle.com>
---
Changes in v2:
- Tweaked some naming
- Added clarifications of should_claim_block()
- Link to v1: https://lore.kernel.org/r/20250214-clarify-steal-v1-1-79dc5adf1b79@google.com

---
Brendan Jackman (2):
      mm/page_alloc: Clarify terminology in migratetype fallback code
      mm/page_alloc: Clarify should_claim_block() commentary

 mm/compaction.c |  4 +--
 mm/internal.h   |  2 +-
 mm/page_alloc.c | 88 ++++++++++++++++++++++++++++++---------------------------
 3 files changed, 50 insertions(+), 44 deletions(-)
---
base-commit: 8df57ad4ed6209600ccd54db2357f75eb46408b6
change-id: 20250214-clarify-steal-f244880441c1

Best regards,
-- 
Brendan Jackman <jackmanb@...gle.com>