Eric Gerzon wrote: > Hello, > > I am trying to get some more information about the following issue: > > # strace -p 2256 > attach: ptrace(PTRACE_ATTACH, ...): Operation not permitted > > I am trying to trace an mdadm re-sync pid and I keep getting the above > error. I believe the MD re-sync process is actually a kernel thread - and you can't strace kernel threads. James Pearson