Adds some /proc debugging output to the nonresident code.
Signed-off-by: Peter Zijlstra <[email protected]>
fs/proc/proc_misc.c | 15 +++++++++
mm/nonresident.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 95 insertions(+)
Index: linux-2.6-git/fs/proc/proc_misc.c
===================================================================
--- linux-2.6-git.orig/fs/proc/proc_misc.c
+++ linux-2.6-git/fs/proc/proc_misc.c
@@ -233,6 +233,20 @@ static struct file_operations proc_zonei
.release = seq_release,
};
+extern struct seq_operations nonresident_op;
+static int nonresident_open(struct inode *inode, struct file *file)
+{
+ (void)inode;
+ return seq_open(file, &nonresident_op);
+}
+
+static struct file_operations nonresident_file_operations = {
+ .open = nonresident_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
static int version_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
@@ -602,6 +616,7 @@ void __init proc_misc_init(void)
create_seq_entry("interrupts", 0, &proc_interrupts_operations);
create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
+ create_seq_entry("nonresident",S_IRUGO, &nonresident_file_operations);
create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
create_seq_entry("zoneinfo",S_IRUGO, &proc_zoneinfo_file_operations);
create_seq_entry("diskstats", 0, &proc_diskstats_operations);
Index: linux-2.6-git/mm/nonresident.c
===================================================================
--- linux-2.6-git.orig/mm/nonresident.c
+++ linux-2.6-git/mm/nonresident.c
@@ -373,3 +373,83 @@ static int __init set_nonresident_factor
}
__setup("nonresident_factor=", set_nonresident_factor);
+
+#ifdef CONFIG_PROC_FS
+
+#include <linux/seq_file.h>
+
+static void *stats_start(struct seq_file *m, loff_t *pos)
+{
+ if (*pos < 0 || *pos >= (1 << nonres_shift))
+ return NULL;
+
+ m->private = (void*)(unsigned long)*pos;
+
+ return pos;
+}
+
+static void *stats_next(struct seq_file *m, void *arg, loff_t *pos)
+{
+ if (*pos < (1 << nonres_shift)-1) {
+ (*pos)++;
+ (unsigned long)m->private++;
+ return pos;
+ }
+ return NULL;
+}
+
+static void stats_stop(struct seq_file *m, void *arg)
+{
+}
+
+static void bucket_stats(struct nr_bucket * nr_bucket, int * b1, int * b2, int * free)
+{
+ unsigned long flags;
+ unsigned int i, b[3] = {0, 0, 0};
+
+ spin_lock_irqsave(&nr_bucket->lock, flags);
+ for (i = 0; i < 3; ++i) {
+ unsigned int j = nr_bucket->hand[i];
+ do
+ {
+ u32 *slot = &nr_bucket->slot[j];
+ if (GET_LISTID(*slot) != i)
+ break;
+ j = GET_INDEX(*slot);
+ ++b[i];
+ } while (j != nr_bucket->hand[i]);
+ }
+ spin_unlock_irqrestore(&nr_bucket->lock, flags);
+
+ *b1=b[0];
+ *b2=b[1];
+ *free=b[2];
+}
+
+static int stats_show(struct seq_file *m, void *arg)
+{
+ unsigned int index = (unsigned long)m->private;
+ struct nr_bucket *nr_bucket = &nonres_table[index];
+ int b1, b2, free;
+
+ bucket_stats(nr_bucket, &b1, &b2, &free);
+ seq_printf(m, "%d\t%d\t%d", b1, b2, free);
+ if (index == 0) {
+ seq_printf(m, "\t%d\t%d\t%d",
+ nonresident_count(NR_b1),
+ nonresident_count(NR_b2),
+ nonresident_count(NR_free));
+ }
+ seq_printf(m,"\n");
+
+ return 0;
+}
+
+struct seq_operations nonresident_op = {
+ .start = stats_start,
+ .next = stats_next,
+ .stop = stats_stop,
+ .show = stats_show,
+};
+
+#endif /* CONFIG_PROC_FS */
--
-
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