id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	field_blocks	field_dependson	field_seealso
599	Ultimate way to prevent the decrementer from underflowing	Jakub Jermář	Martin Decky	"In `kernel/arch/ppc32/src/asm.S`, there is:

{{{
iret_syscall:

        /* Reset decrementer */

        li r31, 1000
        mtdec r31
}}}

This is definitely wrong, especially now when the kernel can program the decrementer with a proper value to achieve its own HZ `clock()` frequency.

A more systematic approach for preventing the decrementer from underflowing and missing the decrementer exception is needed."	defect	new	major		helenos/kernel/ppc32	mainline		decrementer