[Crash-utility] [PATCH v2 16/25] modify ptov offset:cpuspec to hide offline cpus' data
ptov offset:cpuspec can be used to translate per-cpu offset to kernel
virtual address. This patch will hide data of offline cpu.
The original output is like below:
<cut>
crash> ptov bfa0:a
PER-CPU OFFSET: bfa0
CPU VIRTUAL
[0] ffff88003fc0bfa0
[1] ffff88003fc8bfa0
[2] ffff88003fd0bfa0
[3] ffff88003fd8bfa0
<cut>
With data of offline cpu(cpu #2) hiden, the output is like below:
<cut>
crash> ptov bfa0:a
PER-CPU OFFSET: bfa0
CPU VIRTUAL
[0] ffff88003fc0bfa0
[1] ffff88003fc8bfa0
[2] <OFFLINE>
[3] ffff88003fd8bfa0
<cut>
Signed-off-by: Qiao Nuohan <qiaonuohan(a)cn.fujitsu.com>
---
memory.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/memory.c b/memory.c
index 518c917..fbbd01d 100755
--- a/memory.c
+++ b/memory.c
@@ -3192,9 +3192,13 @@ cmd_ptov(void)
continue;
vaddr = paddr + kt->__per_cpu_offset[c];
sprintf(buf1, "[%d]", c);
- fprintf(fp, " %s%lx\n",
- mkstring(buf2, len, LJUST, buf1),
- vaddr);
+
+ fprintf(fp, " %s",
+ mkstring(buf2, len, LJUST, buf1));
+ if (hide_offline_cpu(c))
+ fprintf(fp, "<OFFLINE>\n");
+ else
+ fprintf(fp, "%lx\n", vaddr);
}
FREEBUF(cpus);
} else {
--
1.8.5.3