On 02/24/2010 11:41 AM, Jan Kiszka wrote:
Thomas Gleixner wrote:
On Tue, 23 Feb 2010, Jan Kiszka wrote:
Thomas Gleixner wrote:
The i8254/i8259 locks need to be real spinlocks on preempt-rt. Convert
them to raw_spinlock. No change for !RT kernels.
Doesn't fly for -rt anymore: pic_irq_update runs under this raw lock and
calls kvm_vcpu_kick which tries to wake_up some thread -> scheduling
while atomic.
Hmm, a wakeup itself is fine. Is that code waking a wake queue ?
Yes, it's a wake queue.
So what's the core issue? Is the lock_t in the wait_queue a sleeping mutex?
This restores the deferred VCPU kicking before 956f97cf. We need this
over -rt as wake_up* requires non-atomic context in this configuration.
Seems sane, will apply once I understand why the current code fails.
--
error compiling committee.c: too many arguments to function
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