Once a chr frontend is able to receive input again, we need to inform the io-thread about this fact. Otherwise, main_loop_wait may continue to select without the related backend file descriptor in its set. This can cause high input latencies if only low-rate events arrive otherwise.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com> --- /me wonders if a similar issue explains the slirp slowness under KVM with in-kernel irqchip enabled. Need to check... qemu-char.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/qemu-char.c b/qemu-char.c index 9a5be75..a589a84 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -177,6 +177,7 @@ void qemu_chr_accept_input(CharDriverState *s) { if (s->chr_accept_input) s->chr_accept_input(s); + qemu_notify_event(); } void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...) -- 1.7.3.4