Interrupt hick ups
geert at linux-m68k.org
Thu Jun 15 06:40:10 EST 2000
On Tue, 13 Jun 2000, Geert Uytterhoeven wrote:
> Since a few kernel versions (late 2.3.x), I see interrupt hick ups when doing
> disk access on my Sym53c875. I.e. when I'm typing something and the disk
> shows a lot of activity, keystrokes and mouse moves happen in burst with some
> delay (ca. 2 seconds).
> Anyone seeing a similar thing? This is on a CHRP LongTrail.
> 1: 3232 i8259 keyboard
> 2: 0 i8259 82c59 secondary cascade
> 3: 33331 i8259 serial
> 4: 9 i8259 serial
> 8: 0 i8259 rtc
> 16: 0 OpenPIC 82c59 cascade
> 22: 385557 OpenPIC MESH
> 29: 30531 OpenPIC eth0
> 31: 218039 OpenPIC sym53c8xx
> BAD: 8
It doesn't seem to happen with the 2.4.0-test1 I compiled on june 4, while
2.4.0-test1-ac7 suffers from the problem.
I suspect the changes in open_pic.c that replaced the calls to unmask_irq()
by something different?
The hick ups seem to cause temporary complete system lock ups for ca. 1.75
seconds (repeated wrist watch timing).
Geert (in a `guessing' mood today)
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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