Venki Pallipadi bde6f5f59c x86: voluntary leave_mm before entering ACPI C3 ... Aviod TLB flush IPIs during C3 states by voluntary leave_mm() before entering C3. The performance impact of TLB flush on C3 should not be significant with respect to C3 wakeup latency. Also, CPUs tend to flush TLB in hardware while in C3 anyways. On a 8 logical CPU system, running make -j2, the number of tlbflush IPIs goes down from 40 per second to ~ 0. Total number of interrupts during the run of this workload was ~1200 per second, which makes it ~3% savings in wakeups. There was no measurable performance or power impact however. [ akpm@linux-foundation.org: symbol export fixes. ] Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>		2008-01-30 13:32:01 +01:00
..
acpi	x86: dummy placeholder for acpi/reboot.h	2008-01-30 13:31:17 +01:00
asm-alpha
asm-arm
asm-avr32
asm-blackfin
asm-cris
asm-frv
asm-generic	Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild	2008-01-29 22:46:14 +11:00
asm-h8300
asm-ia64	x86: voluntary leave_mm before entering ACPI C3	2008-01-30 13:32:01 +01:00
asm-m32r	core: remove last users of empty FASTCALL macro	2008-01-30 13:31:17 +01:00
asm-m68k
asm-m68knommu
asm-mips	[MIPS] Malta, Atlas: move an extern function declaration to the header file	2008-01-29 10:15:05 +00:00
asm-parisc
asm-powerpc	powerpc: arch_has_single_step	2008-01-30 13:30:51 +01:00
asm-ppc
asm-s390
asm-sh
asm-sparc
asm-sparc64
asm-um	uml: add asm-um/asm.h	2008-01-30 13:31:17 +01:00
asm-v850
asm-x86	x86: voluntary leave_mm before entering ACPI C3	2008-01-30 13:32:01 +01:00
asm-xtensa
crypto
keys
linux	x86: x86 core dump TLS	2008-01-30 13:31:56 +01:00
math-emu
media
mtd
net
pcmcia
rdma
rxrpc
scsi
sound
video
xen
Kbuild