Re: [Crash-utility] Adding a new command rbtree

----- Original Message ----- Whereas the radix_tree problem I showed in my last email seems to be RHEL5-related, I cannot dump a red-black tree from an rb_root on RHEL5, RHEL6 or Fedora. For example, taking an mm_struct, it has an "mm_rb" rb_root: crash> mm_struct.mm_rb struct mm_struct { [0x8] struct rb_root mm_rb; } Therefore I should be able to dump it with: crash> tree -t rb -o mm_struct.mm_rb <mm-struct-address> I get the mm_struct address like so: crash> vm PID: 20739 TASK: ffff8100190330c0 CPU: 3 COMMAND: "crash" MM PGD RSS TOTAL_VM ffff81003ceaeb00 ffff810023f9f000 111452k 190736k ... But it always fails like this on RHEL5: crash> tree -t rb -o mm_struct.mm_rb ffff81003ceaeb00 ffff81003ceaeb08 ffffffff8006fe65 6508ec8348f38948 tree: invalid kernel virtual address: 6508ec8348f38958 type: "rb_node rb_left" crash> The same thing happens on RHEL6: crash> vm PID: 14353 TASK: ffff88003a93c080 CPU: 3 COMMAND: "crash" MM PGD RSS TOTAL_VM ffff880037b65840 ffff88001c31b000 153552k 288936k ... crash> tree -t rb -o mm_struct.mm_rb ffff880037b65840 ffff880037b65848 ffffffff81010800 f075894ce86d894c tree: invalid kernel virtual address: f075894ce86d895c type: "rb_node rb_left" crash> And on a Fedora 3.3.1-3.fc16 kernel: crash> vm PID: 1175 TASK: ffff88003acb9730 CPU: 2 COMMAND: "crash" MM PGD RSS TOTAL_VM ffff880038495c00 ffff88003ac5a000 181580k 335436k ... crash> tree -t rb -o mm_struct.mm_rb ffff880038495c00 ffff880038495c08 ffffffff81018ce0 f075894ce86d894c tree: invalid kernel virtual address: f075894ce86d895c type: "rb_node rb_left" crash> What's going on there? Dave