linux-toradex.git, branch v3.2-rt10

kconfig-preempt-rt-full.patch

2012-01-16T19:00:37+00:00

Signed-off-by: Thomas Gleixner

kconfig-disable-a-few-options-rt.patch

2012-01-16T19:00:37+00:00

Disable stuff which is known to have issues on RT

Signed-off-by: Thomas Gleixner

cpumask: Disable CONFIG_CPUMASK_OFFSTACK for RT

2012-01-16T19:00:37+00:00

We can't deal with the cpumask allocations which happen in atomic
context (see arch/x86/kernel/apic/io_apic.c) on RT right now.

Signed-off-by: Thomas Gleixner

acpi-gpe-use-wait-simple.patch

2012-01-16T19:00:36+00:00

Signed-off-by: Thomas Gleixner

wait-simple: Simple waitqueue implementation

2012-01-16T19:00:36+00:00

wait_queue is a swiss army knife and in most of the cases the
complexity is not needed. For RT waitqueues are a constant source of
trouble as we can't convert the head lock to a raw spinlock due to
fancy and long lasting callbacks.

Provide a slim version, which allows RT to replace wait queues. This
should go mainline as well, as it lowers memory consumption and
runtime overhead.

Signed-off-by: Thomas Gleixner

dm: Make rt aware

2012-01-16T19:00:36+00:00

Use the BUG_ON_NORT variant for the irq_disabled() checks. RT has
interrupts legitimately enabled here as we cant deadlock against the
irq thread due to the "sleeping spinlocks" conversion.

Reported-by: Luis Claudio R. Goncalves 
Cc: stable-rt@vger.kernel.org
Signed-off-by: Thomas Gleixner

x86: crypto: Reduce preempt disabled regions

2012-01-16T19:00:36+00:00

Restrict the preempt disabled regions to the actual floating point
operations and enable preemption for the administrative actions.

This is necessary on RT to avoid that kfree and other operations are
called with preemption disabled.

Reported-and-tested-by: Carsten Emde 
Signed-off-by: Peter Zijlstra 
Cc: stable-rt@vger.kernel.org
Signed-off-by: Thomas Gleixner

scsi-fcoe-rt-aware.patch

2012-01-16T19:00:36+00:00

Signed-off-by: Thomas Gleixner

x86-kvm-require-const-tsc-for-rt.patch

2012-01-16T19:00:36+00:00

Signed-off-by: Thomas Gleixner

sysrq: Allow immediate Magic SysRq output for PREEMPT_RT_FULL

2012-01-16T19:00:36+00:00

Add a CONFIG option to allow the output from Magic SysRq to be output
immediately, even if this causes large latencies.

If PREEMPT_RT_FULL, printk() will not try to acquire the console lock
when interrupts or preemption are disabled.  If the console lock is
not acquired the printk() output will be buffered, but will not be
output immediately. Some drivers call into the Magic SysRq code
with interrupts or preemption disabled, so the output of Magic SysRq
will be buffered instead of printing immediately if this option is
not selected.

Even with this option selected, Magic SysRq output will be delayed
if the attempt to acquire the console lock fails.

Signed-off-by: Frank Rowand 
Link: http://lkml.kernel.org/r/4E7CEF60.5020508@am.sony.com
Signed-off-by: Thomas Gleixner