linux-toradex.git/kernel/irq, branch v3.2-rc2-rt4

genirq: Allow disabling of softirq processing in irq thread context

2012-04-13T16:01:40+00:00

The processing of softirqs in irq thread context is a performance gain
for the non-rt workloads of a system, but it's counterproductive for
interrupts which are explicitely related to the realtime
workload. Allow such interrupts to prevent softirq processing in their
thread context.

Signed-off-by: Thomas Gleixner 
Cc: stable-rt@vger.kernel.org

genirq-force-threading.patch

2012-04-13T16:01:27+00:00

Signed-off-by: Thomas Gleixner

genirq: disable irqpoll on -rt

2012-04-13T16:01:26+00:00

Creates long latencies for no value

Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

genirq: Disable random call on preempt-rt

2012-04-13T16:01:26+00:00

The random call introduces high latencies and is almost
unused. Disable it for -rt.

Signed-off-by: Thomas Gleixner

Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2012-03-31T01:08:05+00:00

Pull genirq updates from Thomas Gleixner.

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  genirq: Adjust irq thread affinity on IRQ_SET_MASK_OK_NOCOPY return value
  genirq: Respect NUMA node affinity in setup_irq_irq affinity()
  genirq: Get rid of unneeded force parameter in irq_finalize_oneshot()
  genirq: Minor readablity improvement in irq_wake_thread()

genirq: Adjust irq thread affinity on IRQ_SET_MASK_OK_NOCOPY return value

2012-03-30T21:13:46+00:00

irq_move_masked_irq() checks the return code of
chip->irq_set_affinity() only for 0, but IRQ_SET_MASK_OK_NOCOPY is
also a valid return code, which is there to avoid a redundant copy of
the cpumask. But in case of IRQ_SET_MASK_OK_NOCOPY we not only avoid
the redundant copy, we also fail to adjust the thread affinity of an
eventually threaded interrupt handler.

Handle IRQ_SET_MASK_OK (==0) and IRQ_SET_MASK_OK_NOCOPY(==1) return
values correctly by checking the valid return values seperately.

Signed-off-by: Jiang Liu 
Cc: Jiang Liu 
Cc: Keping Chen 
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1333120296-13563-2-git-send-email-jiang.liu@huawei.com
Signed-off-by: Thomas Gleixner

Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm

2012-03-29T23:53:48+00:00

Pull more ARM updates from Russell King.

This got a fair number of conflicts with the  split, but
also with some other sparse-irq and header file include cleanups.  They
all looked pretty trivial, though.

* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (59 commits)
  ARM: fix Kconfig warning for HAVE_BPF_JIT
  ARM: 7361/1: provide XIP_VIRT_ADDR for no-MMU builds
  ARM: 7349/1: integrator: convert to sparse irqs
  ARM: 7259/3: net: JIT compiler for packet filters
  ARM: 7334/1: add jump label support
  ARM: 7333/2: jump label: detect %c support for ARM
  ARM: 7338/1: add support for early console output via semihosting
  ARM: use set_current_blocked() and block_sigmask()
  ARM: exec: remove redundant set_fs(USER_DS)
  ARM: 7332/1: extract out code patch function from kprobes
  ARM: 7331/1: extract out insn generation code from ftrace
  ARM: 7330/1: ftrace: use canonical Thumb-2 wide instruction format
  ARM: 7351/1: ftrace: remove useless memory checks
  ARM: 7316/1: kexec: EOI active and mask all interrupts in kexec crash path
  ARM: Versatile Express: add NO_IOPORT
  ARM: get rid of asm/irq.h in asm/prom.h
  ARM: 7319/1: Print debug info for SIGBUS in user faults
  ARM: 7318/1: gic: refactor irq_start assignment
  ARM: 7317/1: irq: avoid NULL check in for_each_irq_desc loop
  ARM: 7315/1: perf: add support for the Cortex-A7 PMU
  ...

irqdomain: Remove powerpc dependency from debugfs file

2012-03-29T20:31:02+00:00

The debugfs code is really generic for all platforms.  This patch removes the
powerpc-specific directory reference and makes it available to all
architectures.

Signed-off-by: Grant Likely

genirq: Respect NUMA node affinity in setup_irq_irq affinity()

2012-03-29T09:31:53+00:00

We respect node affinity of devices already in the irq descriptor
allocation, but we ignore it for the initial interrupt affinity
setup, so the interrupt might be routed to a different node.

Restrict the default affinity mask to the node on which the irq
descriptor is allocated.

[ tglx: Massaged changelog ]

Signed-off-by: Prarit Bhargava 
Acked-by: Neil Horman 
Cc: Yinghai Lu 
Cc: David Rientjes 
Link: http://lkml.kernel.org/r/1332788538-17425-1-git-send-email-prarit@redhat.com
Signed-off-by: Thomas Gleixner

genirq: Get rid of unneeded force parameter in irq_finalize_oneshot()

2012-03-29T09:31:53+00:00

The only place irq_finalize_oneshot() is called with force parameter set
is the threaded handler error exit path. But IRQTF_RUNTHREAD is dropped
at this point and irq_wake_thread() is not going to set it again,
since PF_EXITING is set for this thread already. So irq_finalize_oneshot()
will drop the threads bit in threads_oneshot anyway and hence the force
parameter is superfluous.

Signed-off-by: Alexander Gordeev 
Link: http://lkml.kernel.org/r/20120321162234.GP24806@dhcp-26-207.brq.redhat.com
Signed-off-by: Thomas Gleixner