On Sun, Jan 06, 2013 at 09:53:47PM -0300, Cristian Rodríguez wrote: > > Yeah, I asked GCC developers exactly this, was told to fill a > enhancement request. If you could also sned them a bug/enhancement request to use a more optimized version of __popcountdi2, that would be great. I'm not sure it helps e2fsprogs much, since it's too hard for us to tell whether we are using a version of the gcc runtime that has a optimized or unuptomized version of builtin_popcount(). But since it doesn't make that much difference, my preference is to just ignore builtin_popcount() for now. If someone is really using 128TB ext4 file systems, and cares about that extra 6 seconds of CPU, it's probably going to require the ugly approach of using x86 asm statements to determine whether or not we're running on a CPU that supports the popcount instruction or not.... - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
