futex error should be a warning

* Matthew Khouzam (matthew.khouzam@ericsson.com) wrote:
> Hi tracing warlords,
> I am testing UST 2.0 on ubuntu Lucid Lynx, and I got the following
> message while running a program:
> libust[22376/22377]: Error: Linux kernels 2.6.33 to 3.0 (with the
> exception of stable versions) do not support FUTEX_WAKE on read-only
> memory mappings correctly. Please upgrade your kernel (fix is commit
> 9ea71503a8ed9184d2d0b8ccc4d269d05f7940ae in Linux kernel mainline).
> LTTng-UST will use polling mode fallback. (in wait_for_sessiond() at
> lttng-ust-comm.c:564)
>
> I think since there is a fallback, and this is not a showstopper just an
> irritation that it should be a warning.

Reported-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>