Signed-off-by: Michael Opdenacker <michael.opdenac...@free-electrons.com>
---
init/Kconfig | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/init/Kconfig b/init/Kconfig
index 9d3585bb2a7a..b6394a9ddc38 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1251,7 +1251,19 @@ config CC_OPTIMIZE_FOR_SIZE
bool "Optimize for size"
help
Enabling this option will pass "-Os" instead of "-O2" to gcc
- resulting in a smaller kernel.
+ resulting in a smaller but slower kernel.
+
+ This option can be useful in very small systems where every
+ byte counts.
+
+ A smaller kernel will also be slightly faster to load and start.
+ However, experiments have shown that such early speedups are
+ quickly offset by the slower kernel speed. Unless you are running
+ a very simple user space, the total boot time should be degraded
+ by this option.
+
+ Anyway, kernel code will be slower to execute and overall system
+ performance will be degraded.
If unsure, say N.
--
1.8.3.2
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