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 <[email protected]> --- 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 -- Crash-utility mailing list [email protected] https://www.redhat.com/mailman/listinfo/crash-utility
