Re: Ctrl+C doesn't interrupt process waiting for I/O

[Joe Peterson]

Alan Cox wrote:
>> disk activity process over each time it completed), it always broke out
>> after one ^C - one time took an extra second or two.  Note that I did
>> not run latencytop (did not have it compiled in my kernel) - if that is
>> required for the test, let me know, but I assume it is just for
>> gathering info when the issue occurs.
> 
> I really don't think this is tty related looking at the code involved and
> also the lack of actual measurements presented. More likely scheduler and
> VM related changes.

Alan, many thanks for your assessment - it's greatly appreciated.  Now
that I've looked into it, the only peculiar thing I see is the redundant
flush_buffer call.  Do you think that should be removed anyway?  It
seems that the following two calls do the same thing in n_tty.c:

		n_tty_flush_buffer(tty);
		tty_driver_flush_buffer(tty);

If this looks redundant, let me know, and I can submit a patch to just
call n_tty_flush_buffer(tty).

					-Thanks, Joe
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/