[merged] mm-page_alloc-remove-setup_pageset.patch removed from -mm tree

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The patch titled
     Subject: mm, page_alloc: remove setup_pageset()
has been removed from the -mm tree.  Its filename was
     mm-page_alloc-remove-setup_pageset.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
From: Vlastimil Babka <vbabka@xxxxxxx>
Subject: mm, page_alloc: remove setup_pageset()

We initialize boot-time pagesets with setup_pageset(), which sets high and
batch values that effectively disable pcplists.

We can remove this wrapper if we just set these values for all pagesets in
pageset_init().  Non-boot pagesets then subsequently update them to the
proper values.

No functional change.

Link: https://lkml.kernel.org/r/20201111092812.11329-4-vbabka@xxxxxxx
Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Oscar Salvador <osalvador@xxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Acked-by: Pankaj Gupta <pankaj.gupta@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/page_alloc.c |   17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

--- a/mm/page_alloc.c~mm-page_alloc-remove-setup_pageset
+++ a/mm/page_alloc.c
@@ -5919,7 +5919,7 @@ static void build_zonelists(pg_data_t *p
  * not check if the processor is online before following the pageset pointer.
  * Other parts of the kernel may not check if the zone is available.
  */
-static void setup_pageset(struct per_cpu_pageset *p);
+static void pageset_init(struct per_cpu_pageset *p);
 static DEFINE_PER_CPU(struct per_cpu_pageset, boot_pageset);
 static DEFINE_PER_CPU(struct per_cpu_nodestat, boot_nodestats);
 
@@ -5987,7 +5987,7 @@ build_all_zonelists_init(void)
 	 * (a chicken-egg dilemma).
 	 */
 	for_each_possible_cpu(cpu)
-		setup_pageset(&per_cpu(boot_pageset, cpu));
+		pageset_init(&per_cpu(boot_pageset, cpu));
 
 	mminit_verify_zonelist();
 	cpuset_init_current_mems_allowed();
@@ -6306,12 +6306,15 @@ static void pageset_init(struct per_cpu_
 	pcp = &p->pcp;
 	for (migratetype = 0; migratetype < MIGRATE_PCPTYPES; migratetype++)
 		INIT_LIST_HEAD(&pcp->lists[migratetype]);
-}
 
-static void setup_pageset(struct per_cpu_pageset *p)
-{
-	pageset_init(p);
-	pageset_update(&p->pcp, 0, 1);
+	/*
+	 * Set batch and high values safe for a boot pageset. A true percpu
+	 * pageset's initialization will update them subsequently. Here we don't
+	 * need to be as careful as pageset_update() as nobody can access the
+	 * pageset yet.
+	 */
+	pcp->high = 0;
+	pcp->batch = 1;
 }
 
 /*
_

Patches currently in -mm which might be from vbabka@xxxxxxx are





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