Zhang Yanmin 1b61b910e9 [PATCH] x86: kernel irq balance doesn't work ... On i386, kernel irq balance doesn't work. 1) In function do_irq_balance, after kernel finds the min_loaded cpu but before calling set_pending_irq to really pin the selected_irq to the target cpu, kernel does a cpus_and with irq_affinity[selected_irq]. Later on, when the irq is acked, kernel would calls move_native_irq=>desc->handler->set_affinity to change the irq affinity. However, every function pointed by hw_interrupt_type->set_affinity(unsigned int irq, cpumask_t cpumask) always changes irq_affinity[irq] to cpumask. Next time when recalling do_irq_balance, it has to do cpu_ands again with irq_affinity[selected_irq], but irq_affinity[selected_irq] already becomes one cpu selected by the first irq balance. 2) Function balance_irq in file arch/i386/kernel/io_apic.c has the same issue. [akpm@osdl.org: cleanups] Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-06-23 07:42:57 -07:00
..
irq	[PATCH] x86: kernel irq balance doesn't work	2006-06-23 07:42:57 -07:00
power
.gitignore
acct.c
audit.c
audit.h
auditfilter.c
auditsc.c
capability.c
compat.c	[PATCH] move_pages: fix 32 -> 64 bit compat function	2006-06-23 07:42:53 -07:00
configs.c
cpu.c
cpuset.c	[PATCH] SELinux: add security hook call to mediate attach_task (kernel/cpuset.c)	2006-06-23 07:42:54 -07:00
dma.c
exec_domain.c
exit.c
extable.c
fork.c
futex_compat.c
futex.c
hrtimer.c
itimer.c
kallsyms.c
Kconfig.hz
Kconfig.preempt
kexec.c
kfifo.c
kmod.c
kprobes.c
ksysfs.c
kthread.c
Makefile
module.c
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
panic.c
params.c
pid.c
posix-cpu-timers.c
posix-timers.c
printk.c
profile.c
ptrace.c
rcupdate.c
rcutorture.c
relay.c
resource.c
sched.c	[PATCH] SELinux: add security hooks to {get,set}affinity	2006-06-23 07:42:53 -07:00
seccomp.c
signal.c
softirq.c
softlockup.c
spinlock.c
stop_machine.c
sys_ni.c
sys.c
sysctl.c
time.c
timer.c
uid16.c
user.c
wait.c
workqueue.c