linux/arch/frv/kernel
Fenghua Yu 5fb7dc37dc define new percpu interface for shared data
per cpu data section contains two types of data.  One set which is
exclusively accessed by the local cpu and the other set which is per cpu,
but also shared by remote cpus.  In the current kernel, these two sets are
not clearely separated out.  This can potentially cause the same data
cacheline shared between the two sets of data, which will result in
unnecessary bouncing of the cacheline between cpus.

One way to fix the problem is to cacheline align the remotely accessed per
cpu data, both at the beginning and at the end.  Because of the padding at
both ends, this will likely cause some memory wastage and also the
interface to achieve this is not clean.

This patch:

Moves the remotely accessed per cpu data (which is currently marked
as ____cacheline_aligned_in_smp) into a different section, where all the data
elements are cacheline aligned. And as such, this differentiates the local
only data and remotely accessed data cleanly.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: <linux-arch@vger.kernel.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19 10:04:44 -07:00
..
Makefile [PATCH] provide kernel_execve on all architectures 2006-10-02 07:57:23 -07:00
asm-offsets.c [PATCH] FRV: Introduce asm-offsets for FRV arch 2006-07-10 13:24:22 -07:00
break.S [PATCH] FRV: Introduce asm-offsets for FRV arch 2006-07-10 13:24:22 -07:00
cmode.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
debug-stub.c [PATCH] FRV: Introduce asm-offsets for FRV arch 2006-07-10 13:24:22 -07:00
dma.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
entry-table.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
entry.S FRV: Connect up new syscalls 2007-07-16 09:05:37 -07:00
frv_ksyms.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
futex.c [PATCH] arch/frv/kernel/futex.c must #include <linux/uaccess.h> 2006-12-07 08:39:26 -08:00
gdb-io.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
gdb-io.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
gdb-stub.c FRV: Be (self-)consistent and use CONFIG_GDB_CONSOLE everywhere 2007-07-16 09:05:37 -07:00
head-mmu-fr451.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head-uc-fr401.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head-uc-fr451.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head-uc-fr555.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head.S [PATCH] FRV: Introduce asm-offsets for FRV arch 2006-07-10 13:24:22 -07:00
head.inc Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
init_task.c [PATCH] nsproxy: move init_nsproxy into kernel/nsproxy.c 2006-10-02 07:57:20 -07:00
irq-mb93091.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
irq-mb93093.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
irq-mb93493.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
irq.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
kernel_execve.S [PATCH] provide kernel_execve on all architectures 2006-10-02 07:57:23 -07:00
kernel_thread.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
local.h [PATCH] FRV: Fix FRV arch compile errors 2006-07-10 13:24:21 -07:00
module.c [PATCH] frv: add module support stubs 2006-01-08 20:13:37 -08:00
pm-mb93093.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
pm.c [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
process.c FRV: Replace pgd management via slabs through quicklists 2007-05-09 12:30:46 -07:00
ptrace.c PTRACE_POKEDATA consolidation 2007-07-17 10:23:03 -07:00
semaphore.c kconfig: centralize the selection of semaphore debugging in lib/Kconfig.debug 2007-05-08 11:15:00 -07:00
setup.c serial: add early_serial_setup() back to header file 2007-07-18 08:38:22 -07:00
signal.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
sleep.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
switch_to.S [PATCH] FRV: Introduce asm-offsets for FRV arch 2006-07-10 13:24:22 -07:00
sys_frv.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
sysctl.c [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
time.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
traps.c [PATCH] FRV: Introduce asm-offsets for FRV arch 2006-07-10 13:24:22 -07:00
uaccess.c [PATCH] frv: __user infrastructure 2006-06-23 07:42:54 -07:00
vmlinux.lds.S define new percpu interface for shared data 2007-07-19 10:04:44 -07:00