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mm, page_alloc: remove setup_pageset()

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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@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Pankaj Gupta <pankaj.gupta@cloud.ionos.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vlastimil Babka 2020-12-14 19:10:47 -08:00 committed by Linus Torvalds
parent 0a8b4f1d5b
commit 69a8396a26
1 changed files with 10 additions and 7 deletions
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17
mm/page_alloc.c
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@ -5919,7 +5919,7 @@ static void build_zonelists(pg_data_t *pgdat)
* 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_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. 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;
}
/*