On Thu, 2016-13-10 at 03:43:52 UTC, Nicholas Piggin wrote: > Exception handlers are aligned to 128 bytes (L1 cache) on 64s, which is > overkill. It can reduce the icache footprint of any individual exception > path. However taken as a whole, the expansion in icache footprint seems > likely to be counter-productive and cause more total misses. > > Create IFETCH_ALIGN_SHIFT/BYTES, which should give optimal ifetch > alignment with much more reasonable alignment. This saves 1792 bytes > from head_64.o text with an allmodconfig build. > > Other subarchitectures should define appropriate IFETCH_ALIGN_SHIFT > values if this becomes more widely used. > > Cc: Anton Blanchard <an...@samba.org> > Signed-off-by: Nicholas Piggin <npig...@gmail.com>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/f4329f2ecb149282fdfdd8830a936a cheers
