The 8250 driver now reports many of these: serial8250: too much work for irq4 These messages turned out to be common these days with a use of virtualization. I tried to increase the limit of processed characters in commit e7328ae1848966181a7ac47e8ae6cddbd2cf55f3 (serial: 8250, increase PASS_LIMIT) in 2011. It was raised from 256 to 512, but it is still not enough, apparently. So disable the warning unless somebody turns on DEBUG (or DYNAMIC_DEBUG _and_ the message). Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> Reported-by: Martin Pluskal <mpluskal@xxxxxxxx> Reported-by: Takashi Iwai <tiwai@xxxxxxxx> References: https://bugzilla.novell.com/show_bug.cgi?id=868394 --- drivers/tty/serial/8250/8250_core.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 81f909c2101f..139ab1997e06 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -1601,8 +1601,7 @@ static irqreturn_t serial8250_interrupt(int irq, void *dev_id) l = l->next; if (l == i->head && pass_counter++ > PASS_LIMIT) { - /* If we hit this, we're dead. */ - printk_ratelimited(KERN_ERR + pr_debug_ratelimited( "serial8250: too much work for irq%d\n", irq); break; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
