Alex Smith 4ace6139bf MIPS: SMP: Don't increment irq_count multiple times for call function IPIs ... The majority of SMP platforms handle their IPIs through do_IRQ() which calls irq_{enter/exit}(). When a call function IPI is received, smp_call_function_interrupt() is called which also calls irq_{enter,exit}(), meaning irq_count is raised twice. When tick broadcasting is used (which is implemented via a call function IPI), this incorrectly causes all CPU idle time on the core receiving broadcast ticks to be accounted as time spent servicing IRQs, as account_process_tick() will account as such if irq_count is greater than 1. This results in 100% CPU usage being reported on a core which receives its ticks via broadcast. This patch removes the SMP smp_call_function_interrupt() wrapper which calls irq_{enter,exit}(). Platforms which handle their IPIs through do_IRQ() now call generic_smp_call_function_interrupt() directly to avoid incrementing irq_count a second time. Platforms which don't (loongson, sgi-ip27, sibyte) call generic_smp_call_function_interrupt() wrapped in irq_{enter,exit}(). Signed-off-by: Alex Smith <alex.smith@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10770/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>		2015-08-03 09:25:12 +02:00
..
alpha	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
arc	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
arm	ARM: SoC fixes	2015-08-02 09:12:46 -07:00
arm64	dmaengine fixes for 4.2-rc5	2015-08-01 12:47:04 -07:00
avr32	avr32: handle NULL as a valid clock object	2015-07-27 09:14:07 +02:00
blackfin	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
c6x	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
cris	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
frv	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
h8300	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
hexagon	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
ia64	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
m32r	m32r: Add ioreadXX/iowriteXX big-endian mmio accessors	2015-07-23 18:08:28 -07:00
m68k	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
metag	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
microblaze	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
mips	MIPS: SMP: Don't increment irq_count multiple times for call function IPIs	2015-08-03 09:25:12 +02:00
mn10300	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
nios2	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
openrisc	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
parisc	parisc: mm: Fix a memory leak related to pmd not attached to the pgd	2015-07-19 08:56:14 +02:00
powerpc	powerpc/eeh-powernv: Fix unbalanced IRQ warning	2015-07-30 19:01:32 +10:00
s390	s390/cachinfo: add missing facility check to init_cache_level()	2015-07-28 08:54:42 +02:00
score	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
sh	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
sparc	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
tile	tile: use free_bootmem_late() for initrd	2015-07-23 14:11:09 -04:00
um	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
unicore32	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
x86	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-08-01 09:16:33 -07:00
xtensa	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
.gitignore
Kconfig	x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86	2015-07-18 03:42:51 +02:00