From 99532903509f3a5c0e2a981d97a049a159b65c2a Mon Sep 17 00:00:00 2001
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Fri, 23 Mar 2012 15:02:53 -0700
Subject: [PATCH] --- yaml --- r: 295277 b: refs/heads/master c:
 59a32e2ce5eb809967cac4e718bc527beca83c59 h: refs/heads/master i:   295275:
 36304812f84e8020339c1327a43fca75db00bfdc v: v3

---
 [refs]               | 2 +-
 trunk/fs/proc/stat.c | 7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index ab2f07312613..3192a312697d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b908243c549448fc0662f9cdd8d5cfe620fcdc31
+refs/heads/master: 59a32e2ce5eb809967cac4e718bc527beca83c59
diff --git a/trunk/fs/proc/stat.c b/trunk/fs/proc/stat.c
index 121f77cfef76..ac446114cd48 100644
--- a/trunk/fs/proc/stat.c
+++ b/trunk/fs/proc/stat.c
@@ -157,11 +157,14 @@ static int show_stat(struct seq_file *p, void *v)
 
 static int stat_open(struct inode *inode, struct file *file)
 {
-	unsigned size = 4096 * (1 + num_possible_cpus() / 32);
+	unsigned size = 1024 + 128 * num_possible_cpus();
 	char *buf;
 	struct seq_file *m;
 	int res;
 
+	/* minimum size to display an interrupt count : 2 bytes */
+	size += 2 * nr_irqs;
+
 	/* don't ask for more than the kmalloc() max size */
 	if (size > KMALLOC_MAX_SIZE)
 		size = KMALLOC_MAX_SIZE;
@@ -173,7 +176,7 @@ static int stat_open(struct inode *inode, struct file *file)
 	if (!res) {
 		m = file->private_data;
 		m->buf = buf;
-		m->size = size;
+		m->size = ksize(buf);
 	} else
 		kfree(buf);
 	return res;