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Subject[RFC 3/5] mm, page_alloc(): remove setup_pageset()
Date
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 specific
values.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
---
mm/page_alloc.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f669a251f654..a0cab2c6055e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5902,7 +5902,7 @@ 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();
@@ -6228,12 +6228,13 @@ static void pageset_init(struct per_cpu_pageset *p)
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. Proper pageset's
+ * initialization will update them.
+ */
+ pcp->high = 0;
+ pcp->batch = 1;
}

static void zone_set_pageset_high_and_batch(struct zone *zone)
--
2.28.0
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