FORTIFY_SOURCE for the kernel

n0dalus n0dalus+redhat at
Mon Jan 23 15:24:46 UTC 2006

On 1/24/06, Josh Boyer <jwboyer at> wrote:
> > On Mon, 2006-01-23 at 07:53 -0600, Josh Boyer wrote:
> >
> > 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.
> That's not true.  Yes, -Os stands for size.  However code size _can_
> translate to performance increase.  Think about cache footprint, etc.
> Smaller code means more can fit in the cache.  It also results in a
> smaller DRAM footprint for thinks like shared libraries, etc.

Yes. In fact, -Os has been shown in many benchmarks to be just as good
if not occasionally superior in efficiency to -O2.


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