On Mon, 2007-10-29 at 11:50 -0700, Paul E. McKenney wrote: > Hello! > > A few random patches that permit POWER to pass kernbench on -rt. > Many of these have more focus on expediency than care for correctness, > so might best be thought of as workarounds than as complete solutions. > There are still issues not addressed by this patch, including: > > o kmem_cache_alloc() from non-preemptible context during > bootup (xics_startup() building the irq_radix_revmap()). > > o unmap_vmas() freeing pages with preemption disabled. > Might be able to address this by linking the pages together, > then freeing them en masse after preemption has been re-enabled, > but there is likely a better approach. > > Thoughts?
I see a lot of case where you add preempt_disable/enable around areas that have the PTE lock held... So in -rt, spin_lock doesn't disable preempt ? I'm a bit worried... there are some strong requirements that anything within that lock is not preempted, so zap_pte_ranges() is the obvious ones but all of them would need to be addressed. Ben. - 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/
