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Fix example error_injection_tool

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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>
This commit is contained in:
Xie XiuQi 2013-03-29 09:43:47 +08:00 committed by Tony Luck
parent eee46b3de7
commit 83d435dd6e
1 changed files with 1 additions and 1 deletions
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2
Documentation/ia64/err_inject.txt
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@ -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:");