Re: [PATCH] log: do not drop debug logs at compile time

[Thomas Monjalon <thomas.monjalon@6wind.com>]

2016-09-16 09:43, Olivier Matz:
> Today, all logs whose level is lower than INFO are dropped at
> compile-time. This prevents from enabling debug logs at runtime using
> --log-level=8.
> 
> The rationale was to remove debug logs from the data path at
> compile-time, avoiding a test at run-time.
> 
> This patch changes the behavior of RTE_LOG() to avoid the compile-time
> optimization, and introduces the RTE_LOG_DP() macro that has the same
> behavior than the previous RTE_LOG(), for the rare cases where debug
> logs are in the data path.
> 
> So it is now possible to enable debug logs at run-time by just
> specifying --log-level=8. Some drivers still have special compile-time
> options to enable more debug log. Maintainers may consider to
> remove/reduce them.
> 
> Signed-off-by: Olivier Matz <olivier.matz@6wind.com>

I think it is a good change.
However I'm not sure we should take it for 16.11 as it was sent late and
there is no review comment.
It is neither really a fix nor really a feature.
If there are some +1, and no opinions against, it will go in 16.11.
Note that some drivers would need some changes to fully benefit of
debug logs enabled at run-time.