linux-kernel - [PATCH] sched: fix the wrong mask

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Message-ID: <48F8664A.2000205@cn.fujitsu.com>
Date:	Fri, 17 Oct 2008 18:17:46 +0800
From:	Miao Xie <miaox@...fujitsu.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Linux-Kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH] sched: fix the wrong mask_len

If the NR_CPUS isn't a multiple of 32, we get a truncated string of sched
domains by catting /proc/schedstat. This is caused by the wrong mask_len.

This patch fix it.

Signed-off-by: Miao Xie <miaox@...fujitsu.com>

---
 kernel/sched_stats.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h
index 8385d43..81365b3 100644
--- a/kernel/sched_stats.h
+++ b/kernel/sched_stats.h
@@ -9,7 +9,7 @@
 static int show_schedstat(struct seq_file *seq, void *v)
 {
 	int cpu;
-	int mask_len = NR_CPUS/32 * 9;
+	int mask_len = (NR_CPUS/32 + 1) * 9;
 	char *mask_str = kmalloc(mask_len, GFP_KERNEL);
 
 	if (mask_str == NULL)
-- 
1.5.4.rc3

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