On Tue, 18 May 2010, Xianghua Xiao wrote: > I could not get dmesg output to console/serial and > klogd(/var/log/messages) anymore with 2.6.33-rt17 _after_ the kernel > boot is done(on non-RT kernel it works fine). I made below changes it > starts to work again, however I'm unsure how safe the change is. > Please advise. Well, obviously it's unsafe if you remove safety checks. And if you care to look at the changelog of kernel/printk.c you'll find out why. Short story: It's introducing nasty latencies. Use "earlyprintk=serial,ttyS0,115200,keep" if you care, but do not complain about the resulting latencies. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
