From: David Hildenbrand <david@redhat.com>
To: Vlastimil Babka <vbabka@suse.cz>, linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org, Michal Hocko <mhocko@kernel.org>,
Pavel Tatashin <pasha.tatashin@soleen.com>,
Oscar Salvador <osalvador@suse.de>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: Re: [RFC 3/5] mm, page_alloc(): remove setup_pageset()
Date: Thu, 10 Sep 2020 13:00:49 +0200 [thread overview]
Message-ID: <1c56d989-a0bf-b742-82fe-5b60e7c148b9@redhat.com> (raw)
In-Reply-To: <20200907163628.26495-4-vbabka@suse.cz>
On 07.09.20 18:36, Vlastimil Babka wrote:
> 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.
>
subject: s/page_alloc()/page_alloc/ to make it look consistent
> 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)
>
Had the same thought about barriers being useless when the pageset is
not hot.
LGTM
Reviewed-by: David Hildenbrand <david@redhat.com>
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2020-09-10 11:04 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-07 16:36 [RFC 0/5] disable pcplists during page isolation Vlastimil Babka
2020-09-07 16:36 ` [RFC 1/5] mm, page_alloc: clean up pageset high and batch update Vlastimil Babka
2020-09-10 8:31 ` Oscar Salvador
2020-09-10 8:34 ` Oscar Salvador
2020-09-10 10:47 ` David Hildenbrand
2020-09-17 16:05 ` Vlastimil Babka
2020-09-07 16:36 ` [RFC 2/5] mm, page_alloc: calculate pageset high and batch once per zone Vlastimil Babka
2020-09-10 9:00 ` Oscar Salvador
2020-09-10 10:56 ` David Hildenbrand
2020-09-07 16:36 ` [RFC 3/5] mm, page_alloc(): remove setup_pageset() Vlastimil Babka
2020-09-10 9:23 ` Oscar Salvador
2020-09-10 9:57 ` Oscar Salvador
2020-09-18 9:37 ` Vlastimil Babka
2020-09-10 11:00 ` David Hildenbrand [this message]
2020-09-07 16:36 ` [RFC 4/5] mm, page_alloc: cache pageset high and batch in struct zone Vlastimil Babka
2020-09-10 11:30 ` Oscar Salvador
2020-09-18 12:02 ` Vlastimil Babka
2020-09-07 16:36 ` [RFC 5/5] mm, page_alloc: disable pcplists during page isolation Vlastimil Babka
2020-09-09 10:48 ` Vlastimil Babka
2020-09-09 11:36 ` Michal Hocko
2020-09-09 11:44 ` David Hildenbrand
2020-09-09 12:57 ` David Hildenbrand
2020-09-09 11:55 ` Vlastimil Babka
2020-09-10 10:29 ` David Hildenbrand
2020-09-10 11:05 ` Vlastimil Babka
2020-09-10 12:42 ` David Hildenbrand
2020-09-09 12:53 ` Pavel Tatashin
2020-09-08 18:29 ` [RFC 0/5] " David Hildenbrand
2020-09-09 10:54 ` Vlastimil Babka
2020-09-09 11:27 ` osalvador
2020-09-09 11:29 ` David Hildenbrand
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