Re: Interrupt storm mitigation needed

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

On Wed, Feb 11, 2015 at 07:52:11PM +0100, Tom Ivar Helbekkmo wrote:
> Now, here're some counters during a hang.  It was a three second hang,
> and a "vmstat -i 10" that was running jumped the count by about 14000 on
> uhci2, and 13000 on uhci0, during the period where the hang was
> exhibited.  In the next 10 second interval, they were back to normal.

Can you add a counter to uhci.c line 1317? The question for me is
whether the device is creating interrupts without actually setting the
status to anything different or if it does provide some notification but
at a too high rate.

Joerg