Re: [PATCH 1/5] perf events: add support for realtime clockattribute

[Thomas Gleixner]

On Sun, 20 Mar 2011, David Ahern wrote:
> +
> +	if (sample_type & PERF_SAMPLE_REALTIME)
> +		data->realtime = ktime_to_ns(ktime_get_real());

That's going to live lock on any sample which happens to hit in a
xtime_lock write locked section. I knew why I suggested adding
tracepoints to the timekeeping code :)

Thanks,

	tglx
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