I use ARM processing. I use the echo command to set the core of the interrupt number 182, but I will report an error. What is going on?
This interrupt exists, and my processor is 4 cores.
117: 4691 0 0 0 GIC 1c50000.eth
120: 0 0 0 0 GIC twi3
121: 0 0 0 0 GIC twi4
125: 0 0 0 0 GIC DE-Interlace
128: 0 0 0 0 GIC 1000000.tr
129: 0 0 0 0 GIC 1c31000.tvd0
130: 0 0 0 0 GIC 1c32000.tvd1
131: 0 0 0 0 GIC 1c33000.tvd2
132: 0 0 0 0 GIC 1c34000.tvd3
182: 26137 27659 7118 2378 - spiio_irq
IPI0: 0 0 0 0 CPU wakeup interrupts
IPI1: 0 757 3544 7480 Timer broadcast interrupts
IPI2: 45800 159900 99681 68379 Rescheduling interrupts
IPI3: 7 11 6 6 Function call interrupts
IPI4: 1 0 0 0 Single function call interrupts
IPI5: 0 0 0 0 CPU stop interrupts
IPI6: 0 0 0 0 completion interrupts
IPI7: 0 0 0 0 CPU backtrace
Err: 0
# echo "3" > /proc/irq/182/smp_affinity
-sh: echo: write error: Input/output error