kernel/linux.git/include/linux/percpu.h, branch linux-2.6.28.y

Merge commit '63cc8c75156462d4b42cbdd76c293b7eee7ddbfe':

2008-09-05T07:24:30+00:00

"percpu: introduce DEFINE_PER_CPU_PAGE_ALIGNED() macro" into x86/core Conflicts: arch/x86/kernel/cpu/common.c Signed-off-by: Ingo Molnar

mm/allocpercpu.c: make 4 functions static

2008-07-26T19:00:12+00:00

This patch makes the following needlessly global functions static: - percpu_depopulate() - __percpu_depopulate_mask() - percpu_populate() - __percpu_populate_mask() Signed-off-by: Adrian Bunk Acked-by: Christoph Lameter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

percpu: introduce DEFINE_PER_CPU_PAGE_ALIGNED() macro

2008-05-25T05:03:46+00:00

While examining holes in percpu section I found this : c05f5000 D per_cpu__current_task c05f5000 D __per_cpu_start c05f5004 D per_cpu__cpu_number c05f5008 D per_cpu__irq_regs c05f500c d per_cpu__cpu_devices c05f5040 D per_cpu__cyc2ns c05f6000 d per_cpu__cpuid4_info c05f6004 d per_cpu__cache_kobject c05f6008 d per_cpu__index_kobject c05f7000 D per_cpu__gdt_page This is because gdt_page is a percpu variable, defined with a page alignement, and linker is doing its job, two times because of .o nesting in the build process. I introduced a new macro DEFINE_PER_CPU_PAGE_ALIGNED() to avoid wasting this space. All page aligned variables (only one at this time) are put in a separate subsection .data.percpu.page_aligned, at the very begining of percpu zone. Before patch , on a x86_32 machine : .data.percpu 30232 3227471872 .data.percpu 22168 3227471872 Thats 8064 bytes saved for each CPU. Signed-off-by: Eric Dumazet Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner

per_cpu: fix DEFINE_PER_CPU_SHARED_ALIGNED for modules

2008-05-15T02:11:14+00:00

Current module loader lookups ".data.percpu" ELF section to perform per_cpu relocation. But DEFINE_PER_CPU_SHARED_ALIGNED() uses another section (".data.percpu.shared_aligned"), currently only handled in vmlinux.lds, not by module loader. To correct this problem, instead of adding logic into module loader, or using at build time a module.lds file for all arches to group ".data.percpu.shared_aligned" into ".data.percpu", just use ".data.percpu" for modules. Alignment requirements are correctly handled by ld and module loader. Signed-off-by: Eric Dumazet Cc: Rusty Russell Cc: Fenghua Yu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Remove superfluous include of string.h from percpu.h

2008-04-29T15:06:04+00:00

There's nothing in percpu.h that requires an explicit inclusion of string.h. Signed-off-by: Robert P. J. Day Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

PERCPU : __percpu_alloc_mask() can dynamically size percpu_data storage

2008-02-06T18:41:04+00:00

Instead of allocating a fix sized array of NR_CPUS pointers for percpu_data, we can use nr_cpu_ids, which is generally < NR_CPUS. Signed-off-by: Eric Dumazet Cc: Christoph Lameter Cc: "David S. Miller" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ia64: use generic percpu

2008-01-30T22:27:58+00:00

ia64 has a special processor specific mapping that can be used to locate the offset for the current per cpu area. Cc: linux-ia64@vger.kernel.org Signed-off-by: Mike Travis Acked-by: Tony Luck Signed-off-by: Ingo Molnar

percpu: move arch XX_PER_CPU_XX definitions into linux/percpu.h

2008-01-30T12:32:52+00:00

- Special consideration for IA64: Add the ability to specify arch specific per cpu flags - remove .data.percpu attribute from DEFINE_PER_CPU for non-smp case. The arch definitions are all the same. So move them into linux/percpu.h. We cannot move DECLARE_PER_CPU since some include files just include asm/percpu.h to avoid include recursion problems. Cc: Rusty Russell Cc: Andi Kleen Signed-off-by: Christoph Lameter Signed-off-by: Mike Travis Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar

Remove unnecessary includes of spinlock.h under include/linux

2007-07-16T16:05:42+00:00

Remove the obviously unnecessary includes of under the include/linux/ directory, and fix the couple errors that are introduced as a result of that. Signed-off-by: Robert P. J. Day Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] x86-64: Account for module percpu space separately from kernel percpu

2007-05-02T17:27:11+00:00

Rather than using a single constant PERCPU_ENOUGH_ROOM, compute it as the sum of kernel_percpu + PERCPU_MODULE_RESERVE. This is now common to all architectures; if an architecture wants to set PERCPU_ENOUGH_ROOM to something special, then it may do so (ia64 is the only one which does). Signed-off-by: Jeremy Fitzhardinge Signed-off-by: Andi Kleen Cc: Rusty Russell Cc: Eric W. Biederman Cc: Andi Kleen