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authorXie XiuQi <xiexiuqi@huawei.com>2013-03-29 09:43:47 +0800
committerTony Luck <tony.luck@intel.com>2013-04-02 09:39:55 -0700
commit83d435dd6e24b17955f91480f633bb39f0a7c2b4 (patch)
tree7adb2be99f14f9bb6caf05bac55e0158fa2d4c06 /Documentation/ia64
parenteee46b3de715c9a2a25ebf3c135b88a1d73d92c2 (diff)
Fix example error_injection_tool
I got a "sched_setaffinity:: Invalid argument" error when using err_injection_tool to inject error on a system with over 32 cpus. Error information when injecting an error on a system with over 32 cpus: $ ./err_injection_tool -i /sys/devices/system/cpu/cpu0/err_inject//err_type_info Begine at Tue Mar 26 11:20:08 2013 Configurations: On cpu32: loop=10, interval=5(s) err_type_info=4101,err_struct_info=95 Error sched_setaffinity:: Invalid argument All done This because there is overflow when calculating the cpumask: the type of (1<<k) is int, while mask[j] is unsigned long. When k > 31, (1<<k) is truncated to ZERO, resulting in a unexpected cpumask. Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'Documentation/ia64')
-rw-r--r--Documentation/ia64/err_inject.txt2
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/ia64/err_inject.txt b/Documentation/ia64/err_inject.txt
index 223e4f0582d0..9f651c181429 100644
--- a/Documentation/ia64/err_inject.txt
+++ b/Documentation/ia64/err_inject.txt
@@ -882,7 +882,7 @@ int err_inj()
cpu=parameters[i].cpu;
k = cpu%64;
j = cpu/64;
- mask[j]=1<<k;
+ mask[j] = 1UL << k;
if (sched_setaffinity(0, MASK_SIZE*8, mask)==-1) {
perror("Error sched_setaffinity:");

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