On Wed, 25 Feb 2015, riel@xxxxxxxxxx wrote:
> diff --git a/kernel/cpuset.c b/kernel/cpuset.c
> index b544e5229d99..94bf59588e23 100644
> --- a/kernel/cpuset.c
> +++ b/kernel/cpuset.c
> @@ -1563,6 +1563,7 @@ typedef enum {
> FILE_MEMORY_PRESSURE,
> FILE_SPREAD_PAGE,
> FILE_SPREAD_SLAB,
> + FILE_ISOLCPUS,
> } cpuset_filetype_t;
>
> static int cpuset_write_u64(struct cgroup_subsys_state *css, struct cftype *cft,
> @@ -1704,6 +1705,20 @@ static ssize_t cpuset_write_resmask(struct kernfs_open_file *of,
> return retval ?: nbytes;
> }
>
> +static void cpuset_seq_print_isolcpus(struct seq_file *sf, struct cpuset *cs)
> +{
> + cpumask_var_t my_isolated_cpus;
> +
> + if (!alloc_cpumask_var(&my_isolated_cpus, GFP_KERNEL))
> + return;
> +
> + cpumask_and(my_isolated_cpus, cs->cpus_allowed, cpu_isolated_map);
> +
> + seq_printf(sf, "%*pbl\n", nodemask_pr_args(my_isolated_cpus));
That unfortunately won't output anything, it needs to be
cpumask_pr_args(). After that's fixed, feel free to add my
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
> +
> + free_cpumask_var(my_isolated_cpus);
> +}
> +
> /*
> * These ascii lists should be read in a single call, by using a user
> * buffer large enough to hold the entire map. If read in smaller
> @@ -1733,6 +1748,9 @@ static int cpuset_common_seq_show(struct seq_file *sf, void *v)
> case FILE_EFFECTIVE_MEMLIST:
> seq_printf(sf, "%*pbl\n", nodemask_pr_args(&cs->effective_mems));
> break;
> + case FILE_ISOLCPUS:
> + cpuset_seq_print_isolcpus(sf, cs);
> + break;
> default:
> ret = -EINVAL;
> }
> @@ -1893,6 +1911,12 @@ static struct cftype files[] = {
> .private = FILE_MEMORY_PRESSURE_ENABLED,
> },
>
> + {
> + .name = "isolcpus",
> + .seq_show = cpuset_common_seq_show,
> + .private = FILE_ISOLCPUS,
> + },
> +
> { } /* terminate */
> };
>
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