On Fri, 7 Mar 2014, Mikulas Patocka wrote: > > What observable performance benefit have you seen with this patch and > > with what architecture? Could we include some data in the changelog? > > None - you usually don't get observable performance benefit from > microoptimizations like this. > > It may be that the cache line that the patch saves aliases some other > important cache lines and then, the patch saves two cache line refills. > Or, the saved cache line doesn't alias anything important and then the > patch doesn't have any effect at all. It's not worth spending many days or > weeks trying to recreate a situation when the code cache is used in such a > way that the patch would help. > Not sure there's any benefit of merging the patch, then. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>