From 0b4eb462da10f832b28d518abffa4d77805928a0 Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" Date: Thu, 30 Apr 2009 17:59:36 -0700 Subject: [PATCH] x86, boot: align the .bss section in the decompressor Aligning the .bss section makes it trivial to use large operation sizes for moving the initialized sections and clearing the .bss. The alignment chosen (L1 cache) is somewhat arbitrary, but should be large enough to avoid all known performance traps and small enough to not cause troubles. [ Impact: trivial performance enhancement, future patch prep ] Signed-off-by: H. Peter Anvin --- arch/x86/boot/compressed/vmlinux.lds.S | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/boot/compressed/vmlinux.lds.S b/arch/x86/boot/compressed/vmlinux.lds.S index 0d26c92..dbe515e 100644 --- a/arch/x86/boot/compressed/vmlinux.lds.S +++ b/arch/x86/boot/compressed/vmlinux.lds.S @@ -42,6 +42,7 @@ SECTIONS *(.data.*) _edata = . ; } + . = ALIGN(CONFIG_X86_L1_CACHE_BYTES); .bss : { _bss = . ; *(.bss) -- 2.7.4