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Commit 1b208622 authored by Tim Abbott's avatar Tim Abbott Committed by Linus Torvalds
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Optimize the ordering of sections in RW_DATA_SECTION. 



The old RW_DATA_SECTION had INIT_TASK_DATA (which was
more-than-PAGE_SIZE-aligned), followed by a bunch of small alignment
stuff, followed by more PAGE_SIZE-aligned stuff, so you wasted memory
in the middle of .data re-aligning back up to PAGE_SIZE.

This patch sorts the sections by alignment requirements, which should
pack them essentially optimally.

Signed-off-by: default avatarTim Abbott <tabbott@ksplice.com>
Reviewed-by: default avatarSam Ravnborg <sam@ravnborg.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e9ea0e2d

include/asm-generic/vmlinux.lds.h

+2 −2
Original line number Diff line number Diff line
@@ -721,12 +721,12 @@ 
	. = ALIGN(PAGE_SIZE);						\

	.data : AT(ADDR(.data) - LOAD_OFFSET) {				\

		INIT_TASK_DATA(inittask)				\

		NOSAVE_DATA						\

		PAGE_ALIGNED_DATA(pagealigned)				\

		CACHELINE_ALIGNED_DATA(cacheline)			\

		READ_MOSTLY_DATA(cacheline)				\

		DATA_DATA						\

		CONSTRUCTORS						\

		NOSAVE_DATA						\

		PAGE_ALIGNED_DATA(pagealigned)				\

	}



#define INIT_TEXT_SECTION(inittext_align)				\