From: Mel Gorman <mgorman@techsingularity.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>, Vlastimil Babka <vbabka@suse.cz>,
Thomas Gleixner <tglx@linutronix.de>,
Matt Fleming <matt@codeblueprint.co.uk>,
Borislav Petkov <bp@alien8.de>, Linux-MM <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Mel Gorman <mgorman@techsingularity.net>
Subject: [PATCH 1/3] mm, pcp: Share common code between memory hotplug and percpu sysctl handler
Date: Fri, 18 Oct 2019 11:56:04 +0100 [thread overview]
Message-ID: <20191018105606.3249-2-mgorman@techsingularity.net> (raw)
In-Reply-To: <20191018105606.3249-1-mgorman@techsingularity.net>
Both the percpu_pagelist_fraction sysctl handler and memory hotplug
have a common requirement of updating the pcpu page allocation batch
and high values. Split the relevant helper to share common code.
No functional change.
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
---
mm/page_alloc.c | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index c0b2e0306720..cafe568d36f6 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7983,6 +7983,15 @@ int lowmem_reserve_ratio_sysctl_handler(struct ctl_table *table, int write,
return 0;
}
+static void __zone_pcp_update(struct zone *zone)
+{
+ unsigned int cpu;
+
+ for_each_possible_cpu(cpu)
+ pageset_set_high_and_batch(zone,
+ per_cpu_ptr(zone->pageset, cpu));
+}
+
/*
* percpu_pagelist_fraction - changes the pcp->high for each zone on each
* cpu. It is the fraction of total pages in each zone that a hot per cpu
@@ -8014,13 +8023,8 @@ int percpu_pagelist_fraction_sysctl_handler(struct ctl_table *table, int write,
if (percpu_pagelist_fraction == old_percpu_pagelist_fraction)
goto out;
- for_each_populated_zone(zone) {
- unsigned int cpu;
-
- for_each_possible_cpu(cpu)
- pageset_set_high_and_batch(zone,
- per_cpu_ptr(zone->pageset, cpu));
- }
+ for_each_populated_zone(zone)
+ __zone_pcp_update(zone);
out:
mutex_unlock(&pcp_batch_high_lock);
return ret;
@@ -8519,11 +8523,8 @@ void free_contig_range(unsigned long pfn, unsigned int nr_pages)
*/
void __meminit zone_pcp_update(struct zone *zone)
{
- unsigned cpu;
mutex_lock(&pcp_batch_high_lock);
- for_each_possible_cpu(cpu)
- pageset_set_high_and_batch(zone,
- per_cpu_ptr(zone->pageset, cpu));
+ __zone_pcp_update(zone);
mutex_unlock(&pcp_batch_high_lock);
}
#endif
--
2.16.4
next prev parent reply other threads:[~2019-10-18 10:56 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-18 10:56 [PATCH 0/3] Recalculate per-cpu page allocator batch and high limits after deferred meminit Mel Gorman
2019-10-18 10:56 ` Mel Gorman [this message]
2019-10-18 11:57 ` [PATCH 1/3] mm, pcp: Share common code between memory hotplug and percpu sysctl handler Matt Fleming
2019-10-18 12:51 ` Michal Hocko
2019-10-18 10:56 ` [PATCH 2/3] mm, meminit: Recalculate pcpu batch and high limits after init completes Mel Gorman
2019-10-18 11:57 ` Matt Fleming
2019-10-18 13:01 ` Michal Hocko
2019-10-18 14:09 ` Mel Gorman
2019-10-19 1:40 ` Andrew Morton
2019-10-20 9:32 ` Mel Gorman
2019-10-18 10:56 ` [PATCH 3/3] mm, pcpu: Make zone pcp updates and reset internal to the mm Mel Gorman
2019-10-18 11:57 ` Matt Fleming
2019-10-18 13:02 ` Michal Hocko
2019-10-18 11:58 ` [PATCH 0/3] Recalculate per-cpu page allocator batch and high limits after deferred meminit Matt Fleming
2019-10-18 12:54 ` Mel Gorman
2019-10-18 14:48 ` Matt Fleming
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