On Tue, 2009-10-13 at 07:39 -0700, Linus Torvalds wrote: > It's not a f*cking performance tweak, and you're ludicrous to claim it is. > It's pointless, and it's making the code _slower_ rather than faster. > > Lookie here, Alan - the common sequence is crap like this: > > tty_buffer_request_room(tty, buf->size); > tty_insert_flip_string(tty, buf->base, buf->size);
The performance tweak of tty_prepare_xxx is that you fill the tty_buffer directly instead of writing data first to a staging buffer and then calling tty_insert_flip_string, which just copies from the staging buffer to the tty_buffer. So it saves a copy operation. -- Paul Fulghum Microgate Systems, Ltd -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
