So what *exactly* happened when it failed to work? The patch didn't apply?
The kernel wouldn't compile? won't boot? Boots but no realtime? Any
error messages?
What suggested that TRACE_IRQFLAGS would make a difference?
Xenomai patching succeeded but when running one of is test apps, "latency" showing
> > > > > > >> > 0"000.000| BUG in low_init(): [main] mlockall: Cannot allocate
> > > > memory
And the mailing list member suggested the followingThe kernel wouldn't compile? won't boot? Boots but no realtime? Any
error messages?
What suggested that TRACE_IRQFLAGS would make a difference?
Xenomai patching succeeded but when running one of is test apps, "latency" showing
> > > > > > >> > 0"000.000| BUG in low_init(): [main] mlockall: Cannot allocate
> > > > memory
"The problematic option is CONFIG_TRACE_IRQFLAGS, not
> > CONFIG_CONTEXT_TRACKING, and you have it enabled, since without it,
> > you would not be able to enable CONFIG_LOCKDEP. Please disable
> > CONFIG_TRACE_IRQFLAGS. You will need to disable all the options
> > depending on that option, such as CONFIG_LOCKDEP."
First thing to do is to verify that you *really* need the patch at all.
95% of people who think they need special real-time patches don't actually
need them. Linux already has fairly good soft real-time support, which
is good for most stuff.
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