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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-07-07 02:39:19 +0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-08-05 06:56:26 +0400
commit6d03b885f0926ab5b66e21307d505afcafa6dced (patch)
treebb2fb54ef0dae38b2abf176544839665bbe10ff3 /mm/memblock.c
parent918fe8d60331f679519ab8239a7232272126da9e (diff)
downloadlinux-6d03b885f0926ab5b66e21307d505afcafa6dced.tar.xz
memblock: Add debugfs files to dump the arrays content
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'mm/memblock.c')
-rw-r--r--mm/memblock.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index 9de5fcdf8e28..cc15be29fd0a 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -16,6 +16,8 @@
#include <linux/bitops.h>
#include <linux/poison.h>
#include <linux/pfn.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
#include <linux/memblock.h>
struct memblock memblock;
@@ -740,3 +742,52 @@ static int __init early_memblock(char *p)
}
early_param("memblock", early_memblock);
+#ifdef CONFIG_DEBUG_FS
+
+static int memblock_debug_show(struct seq_file *m, void *private)
+{
+ struct memblock_type *type = m->private;
+ struct memblock_region *reg;
+ int i;
+
+ for (i = 0; i < type->cnt; i++) {
+ reg = &type->regions[i];
+ seq_printf(m, "%4d: ", i);
+ if (sizeof(phys_addr_t) == 4)
+ seq_printf(m, "0x%08lx..0x%08lx\n",
+ (unsigned long)reg->base,
+ (unsigned long)(reg->base + reg->size - 1));
+ else
+ seq_printf(m, "0x%016llx..0x%016llx\n",
+ (unsigned long long)reg->base,
+ (unsigned long long)(reg->base + reg->size - 1));
+
+ }
+ return 0;
+}
+
+static int memblock_debug_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, memblock_debug_show, inode->i_private);
+}
+
+static const struct file_operations memblock_debug_fops = {
+ .open = memblock_debug_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init memblock_init_debugfs(void)
+{
+ struct dentry *root = debugfs_create_dir("memblock", NULL);
+ if (!root)
+ return -ENXIO;
+ debugfs_create_file("memory", S_IRUGO, root, &memblock.memory, &memblock_debug_fops);
+ debugfs_create_file("reserved", S_IRUGO, root, &memblock.reserved, &memblock_debug_fops);
+
+ return 0;
+}
+__initcall(memblock_init_debugfs);
+
+#endif /* CONFIG_DEBUG_FS */