> > +static int tpk_write_room(struct tty_struct *tty) > > +{ > > + int ret = tpk_space; > > + > > + /* allow char by char under max pressure */ > > + if (tpk_space == 0) > > + tpk_space = 1; > > That won't do what you think, the ldisc will keep seeing progress and > generate millions of 1 byte I/Os in a loop ! I thought that this would automatically reduce processor load, which is obviously not the case. Sorry for the delay, but i am trying to figure out how to slow down write method when under pressure. And that setting tpk_space to 1 would then be just in case we reach 0 to enable further processing. Samo -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html