linux-kernel - [PATCH] CMA: add the amount of cma memory in meminfo

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Date:	Thu, 4 Dec 2014 10:54:33 +0800
From:	Xishi Qiu <qiuxishi@...wei.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	<m.szyprowski@...sung.com>, <mina86@...a86.com>,
	<aneesh.kumar@...ux.vnet.ibm.com>, <iamjoonsoo.kim@....com>
CC:	LKML <linux-kernel@...r.kernel.org>, Linux MM <linux-mm@...ck.org>,
	"Xishi Qiu" <qiuxishi@...wei.com>
Subject: [PATCH] CMA: add the amount of cma memory in meminfo

Add the amount of cma memory in the following meminfo.
/proc/meminfo
/sys/devices/system/node/nodeXX/meminfo

Signed-off-by: Xishi Qiu <qiuxishi@...wei.com>
---
 drivers/base/node.c | 16 ++++++++++------
 fs/proc/meminfo.c   | 12 +++++++++---
 2 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/drivers/base/node.c b/drivers/base/node.c
index 472168c..a27e4e0 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -120,6 +120,9 @@ static ssize_t node_read_meminfo(struct device *dev,
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 		       "Node %d AnonHugePages:  %8lu kB\n"
 #endif
+#ifdef CONFIG_CMA
+		       "Node %d FreeCMAPages:   %8lu kB\n"
+#endif
 			,
 		       nid, K(node_page_state(nid, NR_FILE_DIRTY)),
 		       nid, K(node_page_state(nid, NR_WRITEBACK)),
@@ -136,14 +139,15 @@ static ssize_t node_read_meminfo(struct device *dev,
 		       nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) +
 				node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
 		       nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)),
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
 		       nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE))
-			, nid,
-			K(node_page_state(nid, NR_ANON_TRANSPARENT_HUGEPAGES) *
-			HPAGE_PMD_NR));
-#else
-		       nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+		       , nid, K(node_page_state(nid,
+				NR_ANON_TRANSPARENT_HUGEPAGES) * HPAGE_PMD_NR)
+#endif
+#ifdef CONFIG_CMA
+		       , nid, K(node_page_state(nid, NR_FREE_CMA_PAGES))
 #endif
+			);
 	n += hugetlb_report_node_meminfo(nid, buf + n);
 	return n;
 }
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index aa1eee0..d42e082 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -138,6 +138,9 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 		"AnonHugePages:  %8lu kB\n"
 #endif
+#ifdef CONFIG_CMA
+		"FreeCMAPages:   %8lu kB\n"
+#endif
 		,
 		K(i.totalram),
 		K(i.freeram),
@@ -187,11 +190,14 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
 		vmi.used >> 10,
 		vmi.largest_chunk >> 10
 #ifdef CONFIG_MEMORY_FAILURE
-		,atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)
+		, atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10)
 #endif
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
-		,K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
-		   HPAGE_PMD_NR)
+		, K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
+				HPAGE_PMD_NR)
+#endif
+#ifdef CONFIG_CMA
+		, K(global_page_state(NR_FREE_CMA_PAGES))
 #endif
 		);
 
-- 
2.0.0


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