I get no hanging if I don't invoke an X client called "xgauge"
(homebrew); the one in question displays serial r/w rates, and reads
/proc/tty/driver/serial every 500 millisecs. (I thought I had ruled
out X clients as what was hitting this, but apparently I missed this.)
And I see other problems reading /proc/tty/driver/serial with
any utility ("Bad address", garbage, and, behold, a kernel oops).
So I'm going to post further news under a subject line referencing
/proc/tty/driver/serial .
One more teaser here -- I see from working on the oops that %eax
seems to be fubar when rs_read_proc() (drivers/char/serial.c) calls
line_info() and serial_in() (both are inline). More later.
Bruce Jerrick
Portland, Oregon, USA
email: bjerrick@easystreet.com
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