Currently, when executing the "help -r" command on the aarch64 architecture, only the register values of crashing cpu are displayed, but the register values of other cpus are not shown with the following messages: crash> help -r CPU 0: help: registers not collected for cpu 0 CPU 1: X0: 4000000000000000 X1: ffffc8c40d453d30 X2: ffff37436ecd0000 X3: ffffc8c40d475340 X4: 00000000000968a4 X5: 4000000000000000 X6: 4000000000000000 X7: 7fffffffffffffff X8: 0000016f2a240000 X9: ffffc8c40b0c64fc X10: 0000000000001000 X11: 00000000000000c0 X12: 0000000000000000 X13: 0000000000000072 X14: 0000000000000072 X15: 0000aaab0f98a320 X16: 0000000000000000 X17: 0000000000000000 X18: 0000000000000000 X19: 0000000000000000 X20: 0000000000000000 X21: ffffc8c40d475340 X22: ffffc8c40d460b80 X23: 00000000000000c0 X24: 00000007bf68b1b0 X25: 00000007b9284000 X26: 00000007bf68b1a8 X27: 00000007bbc95a40 X28: 00000007bbc6805a X29: ffffc8c40d453d80 LR: ffffc8c40bebd5d8 SP: ffffc8c40d453d80 PC: ffffc8c40bebd5e8 PSTATE: 60400005 FPVALID: 00000000 CPU 2: help: registers not collected for cpu 2 CPU 3: help: registers not collected for cpu 3 crash> help -D ... num_prstatus_notes: 4 notes[0]: 0 notes[1]: dafa380 (NT_PRSTATUS) si.signo: 0 si.code: 0 si.errno: 0 cursig: 0 sigpend: 0 sighold: 0 pid: 0 ppid: 0 pgrp: 0 sid:0 utime: 0.000000 stime: 0.000000 cutime: 0.000000 cstime: 0.000000 X0: 4000000000000000 X1: ffffc8c40d453d30 X2: ffff37436ecd0000 X3: ffffc8c40d475340 X4: 00000000000968a4 X5: 4000000000000000 X6: 4000000000000000 X7: 7fffffffffffffff X8: 0000016f2a240000 X9: ffffc8c40b0c64fc X10: 0000000000001000 X11: 00000000000000c0 X12: 0000000000000000 X13: 0000000000000072 X14: 0000000000000072 X15: 0000aaab0f98a320 X16: 0000000000000000 X17: 0000000000000000 X18: 0000000000000000 X19: 0000000000000000 X20: 0000000000000000 X21: ffffc8c40d475340 X22: ffffc8c40d460b80 X23: 00000000000000c0 X24: 00000007bf68b1b0 X25: 00000007b9284000 X26: 00000007bf68b1a8 X27: 00000007bbc95a40 X28: 00000007bbc6805a X29: ffffc8c40d453d80 LR: ffffc8c40bebd5d8 SP: ffffc8c40d453d80 PC: ffffc8c40bebd5e8 PSTATE: 60400005 FPVALID: 00000000 notes[2]: 0 notes[3]: 0 ... To fix the current issue, let's map to present cpus instead of online cpus. Signed-off-by: Lianbo Jiang <lijiang(a)redhat.com&gt; --- diskdump.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/diskdump.c b/diskdump.c index 0ff87822732a..6c81c52e58b6 100644 --- a/diskdump.c +++ b/diskdump.c @@ -181,12 +181,12 @@ map_cpus_to_prstatus_kdump_cmprs(void) BZERO(dd->nt_prstatus_percpu, size); /* - * Re-populate the array with the notes mapping to online cpus + * Re-populate the array with the notes mapping to present cpus */ nrcpus = (kt->kernel_NR_CPUS ? kt->kernel_NR_CPUS : NR_CPUS); for (i = 0, j = 0; i < nrcpus; i++) { - if (in_cpu_map(ONLINE_MAP, i) && machdep->is_cpu_prstatus_valid(i)) { + if (in_cpu_map(PRESENT_MAP, i) && machdep->is_cpu_prstatus_valid(i)) { dd->nt_prstatus_percpu[i] = nt_ptr[j++]; dd->num_prstatus_notes = MAX(dd->num_prstatus_notes, i+1); -- 2.51.1