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Date: Sun, 7 Jun 2009 23:15:17 -0700 (PDT)
From: wael showair <showair2003@yahoo.com>
To: linuxppc-dev@ozlabs.org
Subject: what is /proc/interrupts & /proc/irq/*/spurious mean?
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Hi All,
i have a board shipped with Linux kernel 2.6.27.

i have some problems in interrupts but while i was gathering some info about
the interrupts on my board by


cat /proc/interrupts
           CPU0
 16:       2525   OpenPIC   Level     enet_tx
 17:       5606   OpenPIC   Level     enet_rx
 18:          0   OpenPIC   Level     enet_error
 21:          3   OpenPIC   Level     fsldma-channel
 22:          3   OpenPIC   Level     fsldma-channel
 23:          3   OpenPIC   Level     fsldma-channel
 25:          3   OpenPIC   Level     fsldma-channel
 26:        461   OpenPIC   Level     serial
 27:          0   OpenPIC   Level     i2c-mpc
 48:          4   OpenPIC   Level     phy_interrupt
 50:          0   OpenPIC   Edge      DSP-A
 52:         11   OpenPIC   Edge      DSP-B
 54:          0   OpenPIC   Level     FPGA
BAD:          0

actually i m interested in IRQ number 52.
from the previous command: it seems to me OpenPIC has received 11 interrupt
from the device namely DSP-B& this interrupt is edge triggered. Is it
correct?

Also i use:


cat /proc/irq/52/spurious
count 11
unhandled 0
last_unhandled 0 ms

but actually i dont understan its meaning?
does it mean that i received 11 spurious interrupt? i expect this because
the name of the file is spurious.

what does the field unhandled mean?

thanks for ur help.
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