kmem -o is used to display each cpu's offset value that is added
to per-cpu symbol values to translate them into kernel virtual
addresses. This patch will hide data of offline cpus.
The original output is like below:
<cut>
crash> kmem -o
PER-CPU OFFSET VALUES:
CPU 0: ffff88003fc00000
CPU 1: ffff88003fc80000
CPU 2: ffff88003fd00000
CPU 3: ffff88003fd80000
<cut>
With data of offline cpu(cpu #2) hiden, the output is like below:
<cut>
crash> kmem -o
PER-CPU OFFSET VALUES:
CPU 0: ffff88003fc00000
CPU 1: ffff88003fc80000
CPU 2: <OFFLINE>
CPU 3: ffff88003fd80000
<cut>
Signed-off-by: Qiao Nuohan <qiaonuohan@xxxxxxxxxxxxxx>
---
memory.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/memory.c b/memory.c
index 6c7f495..6b7289b 100755
--- a/memory.c
+++ b/memory.c
@@ -17016,7 +17016,12 @@ dump_per_cpu_offsets(void)
for (c = 0; c < kt->cpus; c++) {
sprintf(buf, "CPU %d", c);
- fprintf(fp, "%7s: %lx\n", buf, kt->__per_cpu_offset[c]);
+
+ fprintf(fp, "%7s: ", buf);
+ if (hide_offline_cpu(c))
+ fprintf(fp, "<OFFLINE>\n");
+ else
+ fprintf(fp, "%lx\n", kt->__per_cpu_offset[c]);
}
}
--
1.8.5.3
--
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