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Message-Id: <20170721143915.14161-5-mhocko@kernel.org>
Date: Fri, 21 Jul 2017 16:39:10 +0200
From: Michal Hocko <mhocko@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Mel Gorman <mgorman@...e.de>, Johannes Weiner <hannes@...xchg.org>,
Vlastimil Babka <vbabka@...e.cz>, <linux-mm@...ck.org>,
LKML <linux-kernel@...r.kernel.org>,
Michal Hocko <mhocko@...e.com>
Subject: [PATCH 4/9] mm, memory_hotplug: drop zone from build_all_zonelists
From: Michal Hocko <mhocko@...e.com>
build_all_zonelists gets a zone parameter to initialize zone's
pagesets. There is only a single user which gives a non-NULL
zone parameter and that one doesn't really need the rest of the
build_all_zonelists (see 6dcd73d7011b ("memory-hotplug: allocate zone's
pcp before onlining pages")).
Therefore remove setup_zone_pageset from build_all_zonelists and call it
from its only user directly. This will also remove a pointless zonlists
rebuilding which is always good.
Acked-by: Vlastimil Babka <vbabka@...e.cz>
Signed-off-by: Michal Hocko <mhocko@...e.com>
---
include/linux/mmzone.h | 2 +-
init/main.c | 2 +-
mm/internal.h | 1 +
mm/memory_hotplug.c | 10 +++++-----
mm/page_alloc.c | 13 +++----------
5 files changed, 11 insertions(+), 17 deletions(-)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index b849006b20d3..0add5ee09729 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -771,7 +771,7 @@ static inline bool is_dev_zone(const struct zone *zone)
#include <linux/memory_hotplug.h>
extern struct mutex zonelists_mutex;
-void build_all_zonelists(pg_data_t *pgdat, struct zone *zone);
+void build_all_zonelists(pg_data_t *pgdat);
void wakeup_kswapd(struct zone *zone, int order, enum zone_type classzone_idx);
bool __zone_watermark_ok(struct zone *z, unsigned int order, unsigned long mark,
int classzone_idx, unsigned int alloc_flags,
diff --git a/init/main.c b/init/main.c
index f866510472d7..e1baf6544d15 100644
--- a/init/main.c
+++ b/init/main.c
@@ -519,7 +519,7 @@ asmlinkage __visible void __init start_kernel(void)
boot_cpu_state_init();
smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
- build_all_zonelists(NULL, NULL);
+ build_all_zonelists(NULL);
page_alloc_init();
pr_notice("Kernel command line: %s\n", boot_command_line);
diff --git a/mm/internal.h b/mm/internal.h
index 24d88f084705..19d1f35aa6d7 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -522,4 +522,5 @@ static inline bool is_migrate_highatomic_page(struct page *page)
return get_pageblock_migratetype(page) == MIGRATE_HIGHATOMIC;
}
+void setup_zone_pageset(struct zone *zone);
#endif /* __MM_INTERNAL_H */
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index d620d0427b6b..639b8af37c45 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -952,7 +952,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
mutex_lock(&zonelists_mutex);
if (!populated_zone(zone)) {
need_zonelists_rebuild = 1;
- build_all_zonelists(NULL, zone);
+ setup_zone_pageset(zone);
}
ret = walk_system_ram_range(pfn, nr_pages, &onlined_pages,
@@ -973,7 +973,7 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
if (onlined_pages) {
node_states_set_node(nid, &arg);
if (need_zonelists_rebuild)
- build_all_zonelists(NULL, NULL);
+ build_all_zonelists(NULL);
else
zone_pcp_update(zone);
}
@@ -1051,7 +1051,7 @@ static pg_data_t __ref *hotadd_new_pgdat(int nid, u64 start)
* to access not-initialized zonelist, build here.
*/
mutex_lock(&zonelists_mutex);
- build_all_zonelists(pgdat, NULL);
+ build_all_zonelists(pgdat);
mutex_unlock(&zonelists_mutex);
/*
@@ -1107,7 +1107,7 @@ int try_online_node(int nid)
if (pgdat->node_zonelists->_zonerefs->zone == NULL) {
mutex_lock(&zonelists_mutex);
- build_all_zonelists(NULL, NULL);
+ build_all_zonelists(NULL);
mutex_unlock(&zonelists_mutex);
}
@@ -1727,7 +1727,7 @@ static int __ref __offline_pages(unsigned long start_pfn,
if (!populated_zone(zone)) {
zone_pcp_reset(zone);
mutex_lock(&zonelists_mutex);
- build_all_zonelists(NULL, NULL);
+ build_all_zonelists(NULL);
mutex_unlock(&zonelists_mutex);
} else
zone_pcp_update(zone);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 52dc5ba40914..6e9aca464f66 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5065,7 +5065,6 @@ static void build_zonelists(pg_data_t *pgdat)
static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch);
static DEFINE_PER_CPU(struct per_cpu_pageset, boot_pageset);
static DEFINE_PER_CPU(struct per_cpu_nodestat, boot_nodestats);
-static void setup_zone_pageset(struct zone *zone);
/*
* Global mutex to protect against size modification of zonelists
@@ -5145,20 +5144,14 @@ build_all_zonelists_init(void)
* Called with zonelists_mutex held always
* unless system_state == SYSTEM_BOOTING.
*
- * __ref due to (1) call of __meminit annotated setup_zone_pageset
- * [we're only called with non-NULL zone through __meminit paths] and
- * (2) call of __init annotated helper build_all_zonelists_init
+ * __ref due to call of __init annotated helper build_all_zonelists_init
* [protected by SYSTEM_BOOTING].
*/
-void __ref build_all_zonelists(pg_data_t *pgdat, struct zone *zone)
+void __ref build_all_zonelists(pg_data_t *pgdat)
{
if (system_state == SYSTEM_BOOTING) {
build_all_zonelists_init();
} else {
-#ifdef CONFIG_MEMORY_HOTPLUG
- if (zone)
- setup_zone_pageset(zone);
-#endif
/* we have to stop all cpus to guarantee there is no user
of zonelist */
stop_machine_cpuslocked(__build_all_zonelists, pgdat, NULL);
@@ -5432,7 +5425,7 @@ static void __meminit zone_pageset_init(struct zone *zone, int cpu)
pageset_set_high_and_batch(zone, pcp);
}
-static void __meminit setup_zone_pageset(struct zone *zone)
+void __meminit setup_zone_pageset(struct zone *zone)
{
int cpu;
zone->pageset = alloc_percpu(struct per_cpu_pageset);
--
2.11.0
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