Messages in this thread | | | Subject | Re: [PATCH -rt] CONFIG_PARAVIRT and CONFIG_MCOUNT don't play well together | From | Steven Rostedt <> | Date | Fri, 22 Jun 2007 08:43:42 -0400 |
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On Fri, 2007-06-22 at 01:06 -0700, Chris Wright wrote: > Current -rt is broken when compiling with CONFIG_PARAVIRT and > CONFIG_MCOUNT both enabled. Because CONFIG_MCOUNT disables > CONFIG_REGPARM, the calling convention must once again be explicit > with fastcall. However, this was only half-way addressed in the -rt > patch (adding fastcall back to paravirt_ops function ptr declaration but > not the actual function definitions) so the compiled kernel has caller > putting stuff in registers and callee pulling things from the stack. > Impressive how far into boot it can get despite that ;-) Thanks to > Steven Rostedt for prodding me and starting the initial debugging.
Chris, thanks a hell of a lot for looking into this!!!
-rt doesn't do much with paravirt, but since both -rt and lguest are two things I love to play with, it was really bothering me that they were not getting along.
Much appreciated!
-- Steve
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