linux/arch/powerpc
Anton Blanchard fda9d86100 powerpc: Reduce footprint of xics_ipi_struct
Right now we allocate a cacheline sized NR_CPUS array for xics IPI
communication. Use DECLARE_PER_CPU_SHARED_ALIGNED to put it in percpu
data in its own cacheline since it is written to by other cpus.

On a kernel with NR_CPUS=1024, this saves quite a lot of memory:

   text    data     bss      dec         hex    filename
8767779 2944260 1505724 13217763         c9afe3 vmlinux.irq_cpustat
8767555 2813444 1505724 13086723         c7b003 vmlinux.xics

A saving of around 128kB.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-02-17 14:02:48 +11:00
..
boot zlib: Fix build of powerpc boot wrapper 2010-01-13 16:13:39 -08:00
configs powerpc: Reduce differences between pseries and ppc64 defconfigs 2010-02-09 13:56:06 +11:00
include/asm powerpc: Reduce footprint of irq_stat 2010-02-17 14:02:48 +11:00
kernel powerpc: Reduce footprint of irq_stat 2010-02-17 14:02:48 +11:00
kvm KVM: powerpc: Show timing option only on embedded 2010-01-25 12:26:36 -02:00
lib locking: Convert raw_rwlock to arch_rwlock 2009-12-14 23:55:32 +01:00
math-emu powerpc/math-emu: Fix efp dependence 2009-03-11 06:00:08 -05:00
mm Merge commit 'origin/master' into next 2010-02-17 10:00:42 +11:00
oprofile tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
platforms powerpc: Reduce footprint of xics_ipi_struct 2010-02-17 14:02:48 +11:00
sysdev powerpc: Add coherent_dma_mask to mv64x60 devices 2010-02-17 14:02:47 +11:00
xmon powerpc: Mark some variables in the page fault path __read_mostly 2010-02-03 17:39:48 +11:00
Kconfig powerpc: Increase NR_IRQS Kconfig maximum to 32768 2010-02-03 17:39:50 +11:00
Kconfig.debug Merge branch 'next' of git://git.secretlab.ca/git/linux-2.6 2009-12-16 13:26:53 -08:00
Makefile powerpc: Check for unsupported relocs when using CONFIG_RELOCATABLE 2009-09-24 15:31:40 +10:00
relocs_check.pl powerpc: Check for unsupported relocs when using CONFIG_RELOCATABLE 2009-09-24 15:31:40 +10:00