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Date: Sun, 08 Jul 2012 23:56:17 -0700 From: ebiederm@...ssion.com (Eric W. Biederman) To: "H. Peter Anvin" <hpa@...or.com> Cc: Tejun Heo <tj@...nel.org>, hacklu <embedway.linux@...il.com>, linux-kernel@...r.kernel.org Subject: [PATCH 4/4] x86 boot: Tell ld the kernel doesn't want 2MB file offset alignment. By default ld uses 2MB pages and aligns our 3 program segments in the file on 2MB boundaries, creating unnecessarily large uncompressed vmlinux files. Solve this by passing -z max-page-size 4096 to ld. In my test x86_64 SMP test configuration with CONFIG_DEBUG_RODATA enabled, this reduces the size of vmlinux by roughly 5MB from 15141772 bytes to 10210188 bytes. Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com> --- arch/x86/Makefile | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 1f25214..b5b31c3 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -120,7 +120,7 @@ avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_ KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) -LDFLAGS := -m elf_$(UTS_MACHINE) +LDFLAGS := -m elf_$(UTS_MACHINE) -z max-page-size=4096 # Speed up the build KBUILD_CFLAGS += -pipe -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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