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	[POWERPC] 8xx: generic 8xx code arch/powerpc port	18 years ago
asm-offsets.c	rename thread_info to stack	18 years ago
cpu_setup_power4.S	…
entry.S	[PPC] Fix COMMON symbol warnings	18 years ago
head.S	[POWERPC] Remove the broken Gemini support	18 years ago
head_4xx.S	…
head_8xx.S	…
head_44x.S	…
head_booke.h	…
head_fsl_booke.S	[POWERPC] 85xx: Drop use of SYNC macro in head_fsl_booke.S	18 years ago
machine_kexec.c	…
misc.S	[POWERPC] Merge CPU features pertaining to icache coherency	18 years ago
pci.c	PCI: Use a weak symbol for the empty version of pcibios_add_platform_entries()	18 years ago
ppc-stub.c	…
ppc_htab.c	header cleaning: don't include smp_lock.h when not used	18 years ago
ppc_ksyms.c	[POWERPC] Remove unused do_signal export	18 years ago
relocate_kernel.S	…
rio.c	…
semaphore.c	…
setup.c	[POWERPC] Merge CPU features pertaining to icache coherency	18 years ago
smp-tbsync.c	[POWERPC] Fix irq enable/disable in smp_generic_take_timebase	19 years ago
smp.c	header cleaning: don't include smp_lock.h when not used	18 years ago
softemu8xx.c	…
time.c	[POWERPC] ppc: Add missing calls to set_irq_regs	19 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