On Mon, Aug 05 2024 at 10:56, Thomas Gleixner wrote: > If this is really a race then the following must be true: > > 1) no delay > > CPU0 CPU1 > request_irq(IRQF_ONESHOT) > request_irq(IRQF_COND_ONESHOT) > > 2) delay > > CPU0 CPU1 > request_irq(IRQF_COND_ONESHOT) > request_irq(IRQF_ONESHOT) > > In this case the request on CPU 0 fails with -EBUSY ... > > Confused More confusing: Adding a printk() in setup_irq() - using the config, rootfs and the run.sh script from: http://server.roeck-us.net/qemu/parisc64-6.1.5/ results in: [ 0.000000] genirq: 64 flags: 00215600 [ 0.000000] genirq: 65 flags: 00200400 [ 8.110946] genirq: 66 flags: 00200080 IRQF_ONESHOT is 0x2000 which is not set by any of the interrupt requests. IRQF_COND_ONESHOT has only an effect when 1) Interrupt is shared 2) First interrupt request has IRQF_ONESHOT set Neither #1 nor #2 are true, but maybe your current config enables some moar devices than the one on your website. Thanks, tglx
