Messages in this thread Patch in this message | | | Date | Fri, 19 Mar 2010 16:17:12 +0000 | From | "Jan Beulich" <> | Subject | [PATCH] fix the output from /sys/devices/system/cpu/offline |
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Without CONFIG_CPUMASK_OFFSTACK, simply inverting cpu_online_mask leads to CPUs beyond nr_cpu_ids to be displayed twice and CPUs not even possible to be displayed as offline.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
--- drivers/base/cpu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-2.6.34-rc1/drivers/base/cpu.c +++ 2.6.34-rc1-cpus-offline-display/drivers/base/cpu.c @@ -185,7 +185,7 @@ static ssize_t print_cpus_offline(struct /* display offline cpus < nr_cpu_ids */ if (!alloc_cpumask_var(&offline, GFP_KERNEL)) return -ENOMEM; - cpumask_complement(offline, cpu_online_mask); + cpumask_andnot(offline, cpu_possible_mask, cpu_online_mask); n = cpulist_scnprintf(buf, len, offline); free_cpumask_var(offline);
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