Re: Ingo's realtime_preempt patch causes kernel oops

Daniel Walker
2006-05-23T16:38:51Z

On Tue, 2006-05-23 at 18:24 +0200, Yann.LEPROVOST@wavecom.fr wrote:
> Yeah that's it , I tested with SA_NODELAY and oops disappears, kernel
> doesn't freeze !!
>
> However, the IRQ 1 line is shared between many peripherals in the
> AT91RM9200...
> IRQ 1 is the system interrupt.
>
> From AT91RM9200 datasheet :
>
> "The System Interrupt is the wired-OR of the interrupt signals coming from:
> • the Memory Controller
> • the Debug Unit
> • the System Timer
> • the Real-Time Clock
> • the Power Management Controller"
>

You might have some more issues , cause if you share an SA_NODELAY
handler every handler on that interrupt line becomes an SA_NODELAY
handler .. So you'll have to go make sure non of those other handlers
lock spinlock_t types ..

Daniel