On (05/10/18 19:33), Joe Perches wrote: > > > > [ 28.420519] generic: RSP: 0018:ffffa01dc062bda8 EFLAGS: 00010282 > > [ 28.420522] generic: RAX: ffffffff8317612f RBX: ffffffffffffffea RCX: > > ffffa01dc062bdc8 > > [ 28.420523] generic: RDX: 000055a6a3f03110 RSI: 0000000000000001 RDI: > > ffffffff83e31540 > > [ 28.420525] generic: RBP: 0000000000000001 R08: ffffa01dc062bec0 R09: > > 0000000000000004 > > [ 28.420526] generic: R10: 0000000000000001 R11: 0000000000000000 R12: > > 0000000000000001 > > [ 28.420528] generic: R13: ffffffff83e31540 R14: ffffa01dc062bec0 R15: > > 0000000000000002 > > [ 28.420547] generic: ? rcu_read_lock_sched_held+0x5d/0x63 > > [ 28.420549] generic: ? rcu_sync_lockdep_assert+0x2e/0x54 > > [ 28.420551] generic: ? __sb_start_write+0xeb/0x1a3 > > > > Correct? > > No, that stack dump comes from arch/x86/kernel/dumpstack.c > and that uses printk(KERN_DEFAULT ... and generic printk( > which is not prefixed at all.
That's platform specific. Right? Most of platforms [probably most of them] use plain printk("... %pS"). But some use pr_emerg("[<%p>] %s%pS\n") or pr_info("PC: [<%08lx>] %pS\n"), and so on. In case of x86, I think we will have some changes as well. Looking at generic __warn(): pr_warn("WARNING: CPU: %d PID: %d at %s:%d %pS\n") and pr_warn("WARNING: CPU: %d PID: %d at %pS\n") and probably some others will change now: Instead of [ 0.000000] ------------[ cut here ]------------ [ 0.000000] WARNING: CPU: 0 PID: 0 at blah-blah-blah we will have [ 0.000000] panic: ------------[ cut here ]------------ [ 0.000000] panic: WARNING: CPU: 0 PID: 0 at blah-blah-blah -ss