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
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