Hi, On Sat, Mar 29, 2014 at 2:52 AM, Andi Kleen <a...@firstfloor.org> wrote: > Jovi Zhangwei <jovi.zhang...@gmail.com> writes: > >> Use amalgamation build make ktapvm.ko much smaller. >> >> No amalgamation build in x86_64: >> ktapvm.ko: 2.4M >> >> amalgamation build in x86_64: >> ktapvm.ko: 1.1M >> >> User can set use amalgamation build or not in Makefile. > > This seems dubious. Is that due to debug information? > > [if yes new enough toolchain can fix that] > > If it's due to code something is seriously wrong, > perhaps in your inlines. >
Change: The kernel module size without amalgamation build is: 3.1M I guess it's not because of debug info. Amalgamation build is a kind of simple 'LTO', it compiles the ktapvm as one huge C file and allows GCC to generate faster and shorter code. But I also surprised by the size gap, will spend some time to investigate it. Thanks. Jovi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
