Re: [PATCH] perf tools: enable close-on-exec flag on perf filedescriptor

[Jiri Olsa]

On Mon, Jan 06, 2014 at 11:51:25AM +0100, Yann Droneaud wrote:
> In a previous patch [1][2], flag PERF_FLAG_FD_CLOEXEC was
> added to perf_event_open(2) syscall to allows userspace
> to enable close-on-exec behavor atomically when creating
> the file descriptor.
> 
> This patch makes perf tools use the new flag.
> 
> Beware that perf tools compiled with the new flag won't work
> on older kernel which do not support flag PERF_FLAG_FD_CLOEXEC.

I think we should enhance the api probe routines (perf_do_probe_api)
to detect that, than just bypass us from running on older kernels

jirka
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