kernel_samsung_sm7125

jenna

History

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>		18 years ago
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Makefile	…
apc.c	…
asm-offsets.c	rename thread_info to stack	18 years ago
auxio.c	[SPARC]: Spelling fixes.	18 years ago
cpu.c	…
devices.c	…
ebus.c	[SPARC]: device_node name constification fallout	18 years ago
entry.S	…
errtbls.c	…
etrap.S	…
head.S	[SPARC32]: Fix sparc32 kdebug changes.	18 years ago
idprom.c	…
init_task.c	…
ioport.c	[SPARC]: Spelling fixes.	18 years ago
irq.c	[SPARC]: Spelling fixes.	18 years ago
led.c	…
module.c	…
muldiv.c	…
of_device.c	[SPARC]: constify of_get_property return: arch/sparc	18 years ago
pcic.c	[SPARC]: Spelling fixes.	18 years ago
pmc.c	…
process.c	[SPARC]: Spelling fixes.	18 years ago
prom.c	[SPARC]: Use strcasecmp for OFW property name comparisons.	18 years ago
ptrace.c	…
rtrap.S	…
sclow.S	…
semaphore.c	…
setup.c	move die notifier handling to common code	18 years ago
signal.c	header cleaning: don't include smp_lock.h when not used	18 years ago
smp.c	sched: zap the migration init / cache-hot balancing code	18 years ago
sparc-stub.c	…
sparc_ksyms.c	…
sun4c_irq.c	…
sun4d_irq.c	[SPARC]: Spelling fixes.	18 years ago
sun4d_smp.c	header cleaning: don't include smp_lock.h when not used	18 years ago
sun4m_irq.c	[SPARC]: Spelling fixes.	18 years ago
sun4m_smp.c	header cleaning: don't include smp_lock.h when not used	18 years ago
sun4setup.c	…
sunos_asm.S	…
sunos_ioctl.c	header cleaning: don't include smp_lock.h when not used	18 years ago
sys_solaris.c	header cleaning: don't include smp_lock.h when not used	18 years ago
sys_sparc.c	…
sys_sunos.c	[SPARC]: avoid CHILD_MAX and OPEN_MAX constants	18 years ago
systbls.S	[SPARC]: Wire up signalfd/timerfd/eventfd syscalls.	18 years ago
tadpole.c	…
tick14.c	…
time.c	[SPARC32]: Removes mismatch section warnigs in sparc time.c file	18 years ago
trampoline.S	…
traps.c	Report that kernel is tainted if there was an OOPS	18 years ago
unaligned.c	…
vmlinux.lds.S	define new percpu interface for shared data	18 years ago
windows.c	…
wof.S	…
wuf.S	…