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From: Cody P Schafer <cody@linux.vnet.ibm.com>
To: Linux MM <linux-mm@kvack.org>, David Hansen <dave@linux.vnet.ibm.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Cody P Schafer <jmesmon@gmail.com>,
	Cody P Schafer <cody@linux.vnet.ibm.com>
Subject: [PATCH 7/9] mm: add helper ensure_zone_is_initialized()
Date: Thu, 17 Jan 2013 14:52:59 -0800	[thread overview]
Message-ID: <1358463181-17956-8-git-send-email-cody@linux.vnet.ibm.com> (raw)
In-Reply-To: <1358463181-17956-1-git-send-email-cody@linux.vnet.ibm.com>

From: Cody P Schafer <jmesmon@gmail.com>

ensure_zone_is_initialized() checks if a zone is in a empty & not
initialized state (typically occuring after it is created in memory
hotplugging), and, if so, calls init_currently_empty_zone() to
initialize the zone.

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
---
 mm/memory_hotplug.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index c62bcca..bede456 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -253,6 +253,17 @@ static void fix_zone_id(struct zone *zone, unsigned long start_pfn,
 		set_page_links(pfn_to_page(pfn), zid, nid, pfn);
 }
 
+/* Can fail with -ENOMEM from allocating a wait table with vmalloc() or
+ * alloc_bootmem_node_nopanic() */
+static int __ref ensure_zone_is_initialized(struct zone *zone,
+			unsigned long start_pfn, unsigned long num_pages)
+{
+	if (!zone_is_initialized(zone))
+		return init_currently_empty_zone(zone, start_pfn, num_pages,
+						 MEMMAP_HOTPLUG);
+	return 0;
+}
+
 static int __meminit move_pfn_range_left(struct zone *z1, struct zone *z2,
 		unsigned long start_pfn, unsigned long end_pfn)
 {
-- 
1.8.0.3


WARNING: multiple messages have this Message-ID (diff)
From: Cody P Schafer <cody@linux.vnet.ibm.com>
To: Linux MM <linux-mm@kvack.org>, David Hansen <dave@linux.vnet.ibm.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Cody P Schafer <jmesmon@gmail.com>,
	Cody P Schafer <cody@linux.vnet.ibm.com>
Subject: [PATCH 7/9] mm: add helper ensure_zone_is_initialized()
Date: Thu, 17 Jan 2013 14:52:59 -0800	[thread overview]
Message-ID: <1358463181-17956-8-git-send-email-cody@linux.vnet.ibm.com> (raw)
In-Reply-To: <1358463181-17956-1-git-send-email-cody@linux.vnet.ibm.com>

From: Cody P Schafer <jmesmon@gmail.com>

ensure_zone_is_initialized() checks if a zone is in a empty & not
initialized state (typically occuring after it is created in memory
hotplugging), and, if so, calls init_currently_empty_zone() to
initialize the zone.

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
---
 mm/memory_hotplug.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index c62bcca..bede456 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -253,6 +253,17 @@ static void fix_zone_id(struct zone *zone, unsigned long start_pfn,
 		set_page_links(pfn_to_page(pfn), zid, nid, pfn);
 }
 
+/* Can fail with -ENOMEM from allocating a wait table with vmalloc() or
+ * alloc_bootmem_node_nopanic() */
+static int __ref ensure_zone_is_initialized(struct zone *zone,
+			unsigned long start_pfn, unsigned long num_pages)
+{
+	if (!zone_is_initialized(zone))
+		return init_currently_empty_zone(zone, start_pfn, num_pages,
+						 MEMMAP_HOTPLUG);
+	return 0;
+}
+
 static int __meminit move_pfn_range_left(struct zone *z1, struct zone *z2,
 		unsigned long start_pfn, unsigned long end_pfn)
 {
-- 
1.8.0.3

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  parent reply	other threads:[~2013-01-17 22:55 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-17 22:52 [PATCH v2 0/9] mm: zone & pgdat accessors plus some cleanup Cody P Schafer
2013-01-17 22:52 ` Cody P Schafer
2013-01-17 22:52 ` [PATCH 1/9] mm: add SECTION_IN_PAGE_FLAGS Cody P Schafer
2013-01-17 22:52   ` Cody P Schafer
2013-02-02  0:20   ` Andrew Morton
2013-02-02  0:20     ` Andrew Morton
2013-02-05 22:23     ` Cody P Schafer
2013-02-05 22:23       ` Cody P Schafer
2013-01-17 22:52 ` [PATCH 2/9] mm: add & use zone_end_pfn() and zone_spans_pfn() Cody P Schafer
2013-01-17 22:52   ` Cody P Schafer
2013-01-17 22:52 ` [PATCH 3/9] mm: add zone_is_empty() and zone_is_initialized() Cody P Schafer
2013-01-17 22:52   ` Cody P Schafer
2013-01-17 22:52 ` [PATCH 4/9] mm/page_alloc: add a VM_BUG in __free_one_page() if the zone is uninitialized Cody P Schafer
2013-01-17 22:52   ` Cody P Schafer
2013-01-17 22:52 ` [PATCH 5/9] mmzone: add pgdat_{end_pfn,is_empty}() helpers & consolidate Cody P Schafer
2013-01-17 22:52   ` Cody P Schafer
2013-02-02  0:23   ` Andrew Morton
2013-02-02  0:23     ` Andrew Morton
2013-01-17 22:52 ` [PATCH 6/9] mm/page_alloc: add informative debugging message in page_outside_zone_boundaries() Cody P Schafer
2013-01-17 22:52   ` Cody P Schafer
2013-02-02  0:28   ` Andrew Morton
2013-02-02  0:28     ` Andrew Morton
2013-02-02  0:29     ` Andrew Morton
2013-02-02  0:29       ` Andrew Morton
2013-02-05 22:20       ` Cody P Schafer
2013-02-05 22:20         ` Cody P Schafer
2013-01-17 22:52 ` Cody P Schafer [this message]
2013-01-17 22:52   ` [PATCH 7/9] mm: add helper ensure_zone_is_initialized() Cody P Schafer
2013-01-17 22:53 ` [PATCH 8/9] mm/memory_hotplug: use ensure_zone_is_initialized() Cody P Schafer
2013-01-17 22:53   ` Cody P Schafer
2013-01-17 22:53 ` [PATCH 9/9] mm/memory_hotplug: use pgdat_end_pfn() instead of open coding the same Cody P Schafer
2013-01-17 22:53   ` Cody P Schafer
2013-02-02  0:39 ` [PATCH v2 0/9] mm: zone & pgdat accessors plus some cleanup Andrew Morton
2013-02-02  0:39   ` Andrew Morton
2013-02-05 22:59   ` Cody P Schafer
2013-02-05 22:59     ` Cody P Schafer

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