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From: "Kiryl Shutsemau (Meta)" <kas@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>,
	David Hildenbrand <david@kernel.org>,
	Lorenzo Stoakes <ljs@kernel.org>, Zi Yan <ziy@nvidia.com>,
	Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Kiryl Shutsemau (Meta)" <kas@kernel.org>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	kernel-team@meta.com, "Liam R. Howlett" <liam@infradead.org>,
	Nico Pache <nico.pache@linux.dev>,
	Ryan Roberts <ryan.roberts@arm.com>, Dev Jain <dev.jain@arm.com>,
	Barry Song <baohua@kernel.org>, Lance Yang <lance.yang@linux.dev>,
	Usama Arif <usama.arif@linux.dev>,
	Vlastimil Babka <vbabka@kernel.org>, Jann Horn <jannh@google.com>
Subject: [PATCH v5 7/9] mm/collapse: name the per-table scan reset for what it resets
Date: Wed, 14 Oct 2026 18:11:40 +0100	[thread overview]
Message-ID: <20261014171145.3292736-8-kas@kernel.org> (raw)
In-Reply-To: <20261014171145.3292736-1-kas@kernel.org>

collapse_control_init_scan() resets what one scan accumulates: the node
load, the allocation nodemask and the eligible-PTE bitmap.  It runs before
every PTE table a scan is given, not once per control, so its name points
at the wrong thing.

Call it collapse_scan_reset().

Preparation for giving a control a real init, run once for a whole series
of scans.  Two names a word apart would then stand for two different jobs.

No functional change.

Assisted-by: LLM
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
---
 mm/khugepaged.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index cc69281c542f..60ec7e80d554 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -532,7 +532,7 @@ void __khugepaged_exit(struct mm_struct *mm)
 	}
 }
 
-static void collapse_control_init_scan(struct collapse_control *cc)
+static void collapse_scan_reset(struct collapse_control *cc)
 {
 	memset(cc->node_load, 0, sizeof(cc->node_load));
 	nodes_clear(cc->alloc_nmask);
@@ -1577,7 +1577,7 @@ static enum scan_result collapse_scan_pmd(struct mm_struct *mm,
 		goto out;
 	}
 
-	collapse_control_init_scan(cc);
+	collapse_scan_reset(cc);
 
 	enabled_orders = collapse_possible_orders(vma, vma->vm_flags, tva_flags);
 
@@ -2655,7 +2655,7 @@ static enum scan_result collapse_scan_file(struct mm_struct *mm,
 
 	present = 0;
 	swap = 0;
-	collapse_control_init_scan(cc);
+	collapse_scan_reset(cc);
 	rcu_read_lock();
 	xas_for_each(&xas, folio, start + HPAGE_PMD_NR - 1) {
 		if (xas_retry(&xas, folio))
-- 
2.54.0



  parent reply	other threads:[~2026-10-14 17:12 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-14 17:11 [PATCH v5 0/9] mm/collapse: separate a collapse from its callers Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 1/9] mm/khugepaged: drop redundant mm_struct pin in madvise_collapse() Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 2/9] mm/khugepaged: count collapses where khugepaged makes them Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 3/9] mm/khugepaged: rename mthp_present_ptes bitmap to eligible_ptes Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 4/9] mm/collapse: add collapse.h for the collapse interface Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 5/9] mm/collapse: state what a collapse may do in the policy Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 6/9] mm/collapse: drop the collapse_possible() wrapper Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` Kiryl Shutsemau (Meta) [this message]
2026-10-14 17:11 ` [PATCH v5 8/9] mm/collapse: call collapse_file() from collapse_single_pmd() Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 9/9] mm/collapse: separate scanning a PTE table from collapsing it Kiryl Shutsemau (Meta)
2026-10-14 21:16 ` [PATCH v5 0/9] mm/collapse: separate a collapse from its callers Andrew Morton

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