Messages in this thread | | | Date | Wed, 10 Dec 2014 20:20:35 -0800 | Subject | Re: [GIT PULL] tracing/NMI/printk: Use seq_buf for safe printing from NMI context | From | Linus Torvalds <> |
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On Mon, Dec 8, 2014 at 7:08 AM, Steven Rostedt <rostedt@goodmis.org> wrote: > > One added bonus is that this code also makes the NMI dump stack work on > PREEMPT_RT kernels. As printk() includes sleeping locks on PREEMPT_RT, > printk() only writes to console if the console does not use any > rt_mutex converted spin locks. Which a lot do.
Would it perhaps be possible/reasonable to also use this to get rid of the horrible "early_printk()" stuff, and switch to "vprintk_default" only once the system is sufficiently up-and-running?
Hmm? Not that there are very many users of that horrible thing.
Linus
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