* Kumar Gala <[email protected]> wrote:
> The issue me actually be a driver interrupt locking bug. The driver
> supports three distinct interrupts for TX, RX, Error. I asked Emin to
> try changing the driver to use SA_INTERRUPT in the request_irq() to
> see what happens. I believe that when he did that it worked but hurts
> performance.
this is the -rt kernel, with PREEMPT_RT enabled, so SA_INTERRUPT should
make no difference. All interrupts are executed by their interrupt
thread, and are fully preemptible:
fastcall int handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
struct irqaction *action)
{
int ret, retval = 0, status = 0;
/*
* Unconditionally enable interrupts for threaded
* IRQ handlers:
*/
if (!hardirq_count() || !(action->flags & SA_INTERRUPT))
local_irq_enable();
i.e. SA_INTERRUPT should have no effect.
Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
