[Crash-utility] ps: issue with "waking" and "parked" task states?
Hi Dave,
I recently looked into a linux 4.0 dump where the "ps" command prints
"??"
for the state field of several tasks:
crash> ps
741 660 1 7b408000 ?? 0.0 2152 2592 chcpu
748 2 24 20c284f00 IN 0.0 0 0 [migration/24]
752 2 22 20b1ccf00 ?? 0.0 0 0 [migration/25]
Looking at the "task_struct->state" I get the following:
crash> task_struct 7b408000 | grep state
state = 0x100,
crash> task_struct 20b1ccf00 | grep state
state = 0x200
Looking into include/linux/sched.h states are defined as follows:
#define TASK_RUNNING 0
...
#define TASK_WAKING 256
#define TASK_PARKED 512
When I issue "help -t" I get the following:
RUNNING: 0 (0x0)
INTERRUPTIBLE: 1 (0x1)
UNINTERRUPTIBLE: 2 (0x2)
STOPPED: 4 (0x4)
TRACING_STOPPED: 8 (0x8)
ZOMBIE: 32 (0x20)
DEAD: 16 and 32 (0x10 and 0x20)
WAKEKILL: 64 (0x40)
WAKING: 128 (0x80) <- Should be 256?
I have not digged deeper, but at least wanted to report this issue.
Perhaps you see the problem at once.
Michael