Re: [PATCH] tracing: fix the "old_pid" usage intrace_sched_process_exec()

[Oleg Nesterov]

On 03/30, Oleg Nesterov wrote:
>
> 1. TRACE_EVENT(sched_process_exec) forgets to actually use the
>    old pid argument, it sets ->old_pid = p->pid.
>
> 2. search_binary_handler() uses the wrong pid number. tracepoint
>    needs the global pid_t from the root namespace, while old_pid
>    is the virtual pid number as it seen by the tracer/parent.

Not really serious, but probably makes sense for 3.4. This fixes
the recently merged 4ff16c25e2cc48cbe6956e356c38a25ac063a64d
"tracepoint, vfs, sched: Add exec() tracepoint"

Oleg.

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