Messages in this thread Patch in this message | | | Date | Tue, 07 Feb 2006 22:45:20 -0800 | From | Chris Wright <> | Subject | [PATCH 17/23] [PATCH] x86_64: Let impossible CPUs point to reference per cpu data |
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-stable review patch. If anyone has any objections, please let us know. ------------------
Don't mark the reference per cpu data init data (so it stays around after boot) and point all impossible CPUs to it. This way they reference some valid - although shared memory. Usually this is only initialization like INIT_LIST_HEADs and there won't be races because these CPUs never run. Still somewhat hackish.
Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Chris Wright <chrisw@sous-sol.org> ---
arch/x86_64/kernel/vmlinux.lds.S | 10 ++++++---- 1 files changed, 6 insertions(+), 4 deletions(-)
Index: linux-2.6.15.3/arch/x86_64/kernel/vmlinux.lds.S =================================================================== --- linux-2.6.15.3.orig/arch/x86_64/kernel/vmlinux.lds.S +++ linux-2.6.15.3/arch/x86_64/kernel/vmlinux.lds.S @@ -170,13 +170,15 @@ SECTIONS . = ALIGN(4096); __initramfs_start = .; .init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) { *(.init.ramfs) } - __initramfs_end = .; - . = ALIGN(32); + __initramfs_end = .; + /* temporary here to work around NR_CPUS. If you see this comment in 2.6.17+ + complain */ + . = ALIGN(4096); + __init_end = .; + . = ALIGN(128); __per_cpu_start = .; .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { *(.data.percpu) } __per_cpu_end = .; - . = ALIGN(4096); - __init_end = .; . = ALIGN(4096); __nosave_begin = .; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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