Messages in this thread | | | Date | Wed, 23 Jan 2008 13:43:55 -0500 (EST) | From | Steven Rostedt <> | Subject | Re: [PATCH 01/20 -v5] printk - dont wakeup klogd with interrupts disabled |
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On Wed, 23 Jan 2008, Daniel Walker wrote:
> > On Wed, 2008-01-23 at 13:18 -0500, Steven Rostedt wrote: > > > The wakeup hook in schedule is when we find out that we hit our max. I > > could postpone that somehow, but that would require more glue code than I > > would like to add. > > Which hook specifically ?
The wakeup tracer does a print on max when the new task is about to be switched to (in context_switch).
> > > As for -rt, we've disabled printk for consoles not ATOMIC safe. So the > > only consoles that will print in atomic sections so far are, earlyprintk > > and the VGA. > > Is this code you added recently for tracing?
Nope, it's been there for a few releases and had nothing to do with the latency tracer.
<looks at code>
Hmm, seems that only the "hack" fix is in upstream. The Red Hat version has the better fix, but mainline didn't get it. OK, I'll add that to the next -rt release.
-- Steve
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