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