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SubjectRe: [PATCH] Always show Cpus_allowed field in /proc/<pid>/status.
On Mon, Sep 21, 2009 at 11:06:27AM +0200, Heiko Carstens wrote:

> +void task_cpus_allowed(struct seq_file *m, struct task_struct *task)

sigh. This should have been static.. updated patch below.


Subject: [PATCH] Always show Cpus_allowed fields in /proc/<pid>/status.

From: Heiko Carstens <heiko.carstens@de.ibm.com>

The Cpus_allowed fields in /proc/<pid>/status is currently only shown in
case of CONFIG_CPUSETS. However their contents are also useful for the
!CONFIG_CPUSETS case.
So change the current behaviour and always show these fields.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
---
fs/proc/array.c | 11 +++++++++++
kernel/cpuset.c | 8 +-------
2 files changed, 12 insertions(+), 7 deletions(-)

Index: linux-2.6/fs/proc/array.c
===================================================================
--- linux-2.6.orig/fs/proc/array.c
+++ linux-2.6/fs/proc/array.c
@@ -321,6 +321,16 @@ static inline void task_context_switch_c
p->nivcsw);
}

+static void task_cpus_allowed(struct seq_file *m, struct task_struct *task)
+{
+ seq_printf(m, "Cpus_allowed:\t");
+ seq_cpumask(m, &task->cpus_allowed);
+ seq_printf(m, "\n");
+ seq_printf(m, "Cpus_allowed_list:\t");
+ seq_cpumask_list(m, &task->cpus_allowed);
+ seq_printf(m, "\n");
+}
+
int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task)
{
@@ -335,6 +345,7 @@ int proc_pid_status(struct seq_file *m,
}
task_sig(m, task);
task_cap(m, task);
+ task_cpus_allowed(m, task);
cpuset_task_status_allowed(m, task);
#if defined(CONFIG_S390)
task_show_regs(m, task);
Index: linux-2.6/kernel/cpuset.c
===================================================================
--- linux-2.6.orig/kernel/cpuset.c
+++ linux-2.6/kernel/cpuset.c
@@ -2499,15 +2499,9 @@ const struct file_operations proc_cpuset
};
#endif /* CONFIG_PROC_PID_CPUSET */

-/* Display task cpus_allowed, mems_allowed in /proc/<pid>/status file. */
+/* Display task mems_allowed in /proc/<pid>/status file. */
void cpuset_task_status_allowed(struct seq_file *m, struct task_struct *task)
{
- seq_printf(m, "Cpus_allowed:\t");
- seq_cpumask(m, &task->cpus_allowed);
- seq_printf(m, "\n");
- seq_printf(m, "Cpus_allowed_list:\t");
- seq_cpumask_list(m, &task->cpus_allowed);
- seq_printf(m, "\n");
seq_printf(m, "Mems_allowed:\t");
seq_nodemask(m, &task->mems_allowed);
seq_printf(m, "\n");

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