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 -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility