[Crash-utility] [PATCH v2 24/25] modify ps -l/-m -C cpu to hide offline cpus' data

[Qiao Nuohan]

ps -l/-m -C cpu is used to dump most-recently run tasks on specified
cpus. This patch is used to hide data of offline cpus.

The original output is like below:
<cut>
crash> ps -l -C 2
CPU: 2
[ 3443744250246] [??]  PID: 25     TASK: ffff88003dafb8e0  CPU: 2   COMMAND: "migration/2"
[ 3443744209862] [??]  PID: 24     TASK: ffff88003dafad80  CPU: 2   COMMAND: "watchdog/2"
...
[     501159134] [IN]  PID: 52     TASK: ffff88003d4a38e0  CPU: 2   COMMAND: "crypto"
[     409792745] [IN]  PID: 48     TASK: ffff88003d4a4440  CPU: 2   COMMAND: "kswapd0"
[             0] [RU]  PID: 0      TASK: ffff88003dad5b00  CPU: 2   COMMAND: "swapper/2"
<cut>

With data of offline cpu(cpu #2) hiden, the output is like below:
<cut>
crash> ps -l -C 2
CPU: 2 <OFFLINE>
<cut>

Signed-off-by: Qiao Nuohan <qiaonuohan at cn.fujitsu.com>
---
 task.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/task.c b/task.c
index 2c8c4e4..bc11cf3 100755
--- a/task.c
+++ b/task.c
@@ -3348,8 +3348,14 @@ show_last_run(struct task_context *tc, struct psinfo *psi)
 		for (c = others = 0; c < kt->cpus; c++) {
 			if (!NUM_IN_BITMAP(psi->cpus, c))
 				continue;
-			fprintf(fp, "%sCPU: %d\n", 
+			fprintf(fp, "%sCPU: %d",
 				others++ ? "\n" : "", c);
+			if (hide_offline_cpu(c)) {
+				fprintf(fp, " <OFFLINE>\n");
+				continue;
+			} else
+				fprintf(fp, "\n");
+
 			tcp = FIRST_CONTEXT();
 			for (i = 0; i < RUNNING_TASKS(); i++, tcp++) {
 				if (tcp->processor != c)
@@ -3431,9 +3437,15 @@ show_milliseconds(struct task_context *tc, struct psinfo *psi)
 			if (!NUM_IN_BITMAP(psi->cpus, c))
 				continue;
 
-			fprintf(fp, "%sCPU: %d\n", 
+			fprintf(fp, "%sCPU: %d",
 				others++ ? "\n" : "", c);
 
+			if (hide_offline_cpu(c)) {
+				fprintf(fp, " <OFFLINE>\n");
+				continue;
+			} else
+				fprintf(fp, "\n");
+
 			if ((kt->flags & SMP) && (kt->flags & PER_CPU_OFF))
 				runq = rq_sp->value + kt->__per_cpu_offset[c];
 			else
-- 
1.8.5.3