Change the way backoff works. Instead of stopping reading from the pty

when the client tty backs up too much, just stop updating the tty and
only update the internal screen. Then when the tty recovers, force a
redraw.

This prevents a dodgy client from causing other clients to go into
backoff while still allowing tmux to be responsive (locally) when seeing
lots of output.

1 files changed, 3 insertions, 1 deletions

diff --git a/tty.c b/tty.c
index fa2cd552..bf0a48b0 100644
--- a/tty.c
+++ b/tty.c
@@ -578,7 +578,9 @@ tty_write(void (*cmdfn)(
 			continue;
 
 		if (c->session->curw->window == wp->window) {
-			if (c->tty.flags & TTY_FREEZE || c->tty.term == NULL)
+			if (c->tty.term == NULL)
+				continue;
+			if (c->tty.flags & (TTY_FREEZE|TTY_BACKOFF))
 				continue;
 			cmdfn(&c->tty, ctx);
 		}