FORTIFY_SOURCE for the kernel

Mike A. Harris mharris at
Mon Jan 23 17:31:39 UTC 2006

Ralf Corsepius wrote:
> On Mon, 2006-01-23 at 07:53 -0600, Josh Boyer wrote:
>>>On Mon, 2006-01-23 at 11:30 +0900, Warren Togami wrote:
>>>Going off at a tangent....what would people think of the idea of
>>>switching to -Os in $RPM_OPT_FLAGS _after_ FC5 is released?
>>If it results in some form of improvement in performance, I'm all for it.
> The "s" in -Os stands for "size", not for "speed". So if -Os compiled
> code-execution is faster than the default CFLAGS, something must be
> broken elsewhere.

Not necessarily.  The reduced size of the executable makes more
efficient use of CPU cache, which can have a net result of increased
speed as well.

Mike A. Harris  *  Open Source Advocate  *
                       Proud Canadian.

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