Messages in this thread | | | Date | Tue, 18 May 2010 08:13:33 -0500 | Subject | PREEMPT_RT (2.6.33-rt17) disabled printk-to-console after console_init | From | Xianghua Xiao <> |
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I would like to have printk output to my ttyS0 console all the time, with 2.6.33-rt17, after kernel is booted up with all messages shown normally on the serial port until I login in, from this point on, all printk messages go to 'dmesg(log_buf)' fine, but I could never get them shown up on serial console anymore. I tried adjust /proc/sys/kernel/printk etc none helped.
Switch PREEMPT_RT to PREEMPT_VOLUNTARY and reboot, now everything works, i.e. I can see printk on my console after I login.
Look at the RT patch itself, I do find some changes to printk itself, however I'm unsure what is causing this(i.e printk not going to console after login).
Thanks, Xianghua
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