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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cpu	sh: sh-rtc support for SH7709.	18 years ago
timers	sh: Preliminary support for the SH-X3 CPU.	18 years ago
vsyscall	…
Makefile	…
asm-offsets.c	…
cf-enabler.c	…
cpufreq.c	…
crash_dump.c	…
debugtraps.S	…
early_printk.c	…
entry-common.S	…
head.S	…
init_task.c	…
io.c	…
io_generic.c	…
irq.c	sh: Update the alignment when 4K stacks are used.	18 years ago
kgdb_jmp.S	…
kgdb_stub.c	…
machine_kexec.c	…
machvec.c	…
module.c	…
pm.c	…
process.c	sh: Tidy up dependencies for SH-2 build.	18 years ago
ptrace.c	PTRACE_POKEDATA consolidation	18 years ago
relocate_kernel.S	…
semaphore.c	…
setup.c	sh: Preliminary support for the SH-X3 CPU.	18 years ago
sh_bios.c	…
sh_ksyms.c	sh: Export div symbols for GCC 4.2 and ST GCC.	18 years ago
signal.c	Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6	18 years ago
smp.c	…
stacktrace.c	…
sys_sh.c	…
syscalls.S	sh: Wire up mempolicy syscalls.	18 years ago
time.c	…
topology.c	sh: Fix up cpu to node mapping in sysfs.	18 years ago
traps.c	Report that kernel is tainted if there was an OOPS	18 years ago
vmlinux.lds.S	define new percpu interface for shared data	18 years ago