From: Matt Mackall This keeps the alignment of the init task matched with the stack size. Saves 4k for 4k stacks, keeps system from exploding with 16k. DESC From: Zwane Mwaikambo Subject: Re: [patch] proper alignment of init task in kernel image EDESC On Sun, 14 Mar 2004, Matt Mackall wrote: > This keeps the alignment of the init task matched with the stack size. > Saves 4k for 4k stacks, keeps system from exploding with 16k. Please apply. Don't forget the following minor patch; Index: linux-2.6.4-mm1/arch/i386/kernel/init_task.c =================================================================== RCS file: /home/cvsroot/linux-2.6.4-mm1/arch/i386/kernel/init_task.c,v retrieving revision 1.1.1.1 --- 25-akpm/arch/i386/kernel/init_task.c | 2 +- 25-akpm/arch/i386/kernel/vmlinux.lds.S | 5 +++-- 2 files changed, 4 insertions(+), 3 deletions(-) diff -puN arch/i386/kernel/vmlinux.lds.S~init-task-alignment-fix arch/i386/kernel/vmlinux.lds.S --- 25/arch/i386/kernel/vmlinux.lds.S~init-task-alignment-fix 2004-03-14 16:57:21.198762192 -0800 +++ 25-akpm/arch/i386/kernel/vmlinux.lds.S 2004-03-14 16:57:21.200761888 -0800 @@ -3,7 +3,8 @@ */ #include - +#include + OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386") OUTPUT_ARCH(i386) ENTRY(startup_32) @@ -48,7 +49,7 @@ SECTIONS _edata = .; /* End of data section */ - . = ALIGN(8192); /* init_task */ + . = ALIGN(THREAD_SIZE); /* init_task */ .data.init_task : { *(.data.init_task) } /* will be freed after init */ diff -puN arch/i386/kernel/init_task.c~init-task-alignment-fix arch/i386/kernel/init_task.c --- 25/arch/i386/kernel/init_task.c~init-task-alignment-fix 2004-03-14 16:57:26.262992312 -0800 +++ 25-akpm/arch/i386/kernel/init_task.c 2004-03-14 16:57:26.264992008 -0800 @@ -20,7 +20,7 @@ EXPORT_SYMBOL(init_mm); /* * Initial thread structure. * - * We need to make sure that this is 8192-byte aligned due to the + * We need to make sure that this is THREAD_SIZE aligned due to the * way process stacks are handled. This is done by having a special * "init_task" linker map entry.. */ _