Hi, This is a repost of a couple patches I posted about a month ago related to porting perfmon2 to powerpc. I wanted to see if there were any further comments on these patches, and also wanted to ask if these should be submitted separately to the ppc kernel maintainers, or if they should be kept with the perfmon2 patches until those are submitted.
The first patch adds an smp_call_function_single() routine for powerpc. In 2.6.21, there's a prototype for this routine in include/linux/smp.h, and it is implemented on i386, ia64, and x86-64. Since this routine is very similar to the existing smp_call_function() routine, the common portions have been pulled out into __smp_call_function(). Perfmon2 uses this unload a context that's loaded on a CPU other than the one that's performing the close-context routine. The second patch changes the powerpc version of topology_init() from an __initcall to a subsys_initcall, which matches the definition of topology_init() on all other architectures. Perfmon2's initialization is done as a subsys_initcall, but it fails to set up its sysfs information if topology_init() has not yet run. Changing perfmon2 to an __initcall() was discussed, but we came to the conclusion that this would not work because the perfmon2 core must be initialized before any of its sub-modules. These sub-modules are located in arch/*/perfmon/, and thus if they are built statically they would run their module_init routines before the perfmon2 core ran its __initcall routine. We have been running tests with these patches for the last few weeks on Cell and Power5 systems without any problems. Thanks, -- Kevin Corry [EMAIL PROTECTED] http://www.ibm.com/linux/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/