On Wed, May 20, 2015 at 1:32 PM, H. Peter Anvin <[email protected]> wrote: > On 05/20/2015 01:02 PM, Andy Lutomirski wrote: >>> >>> I got >>> >>> [hjl@gnu-tools-1 kernel.org]$ readelf -r old/vmlinux.o | head -5 >>> >>> Relocation section '.rela.text' at offset 0xafea2f0 contains 205717 entries: >>> Offset Info Type Sym. Value Sym. Name + >>> Addend >>> 000000000001 1253100000002 R_X86_64_PC32 0000000000001e70 __fentry__ - >>> 4 >>> 000000000009 1c8c00000002 R_X86_64_PC32 0000000000000000 .data + 51bc >>> [hjl@gnu-tools-1 kernel.org]$ readelf -r new/vmlinux.o | head -5 >>> >>> Relocation section '.rela.text' at offset 0xafea280 contains 205711 entries: >>> Offset Info Type Sym. Value Sym. Name + >>> Addend >>> 000000000001 1253100000002 R_X86_64_PC32 0000000000001e70 __fentry__ - >>> 4 >>> 000000000009 1c8c00000002 R_X86_64_PC32 0000000000000000 .data + 51bc >>> [hjl@gnu-tools-1 kernel.org]$ >>> >>> It removes 6 relocations. On gcc master branch, >>> >>> [hjl@gnu-tools-1 gcc-misc]$ size build-x86_64-linux*/gcc/cc1 >>> text data bss dec hex filename >>> 21529621 62256 1348312 22940189 15e0a1d build-x86_64-linux.branch/gcc/cc1 >>> 21529749 62256 1348312 22940317 15e0a9d build-x86_64-linux/gcc/cc1 >>> [hjl@gnu-tools-1 gcc-misc]$ size build-x86_64-linux*/gcc/cc1plus >>> text data bss dec hex filename >>> 23713509 62400 1372760 25148669 17fbcfd >>> build-x86_64-linux.branch/gcc/cc1plus >>> 23713669 62400 1372760 25148829 17fbd9d build-x86_64-linux/gcc/cc1plus >>> [hjl@gnu-tools-1 gcc-misc]$ >>> >>> It is more effective. I will run more tests. >> >> This seems like a sensible idea, but I can imagine it breaking some >> weird use cases (like that one Linux thing). Is that okay? >> > > What about the patch I posted recently? >
I replied in that thread. --Andy > -hpa > > -- Andy Lutomirski AMA Capital Management, LLC -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
