On Wed, Sep 25, 2013 at 7:30 PM, Peter Hurley <pe...@hurleysoftware.com> wrote: > On 09/25/2013 05:04 AM, Lin Ming wrote: >> >> On Wed, Sep 18, 2013 at 8:22 AM, Peter Hurley <pe...@hurleysoftware.com> >> wrote: >> [snip] >>> >>> >>> Looking over vmalloc.c, the critical section footprint of the >>> vmap_area_lock >>> could definitely be reduced (even nearly eliminated), but that's a >>> project >>> for >>> another day :) >> >> >> Hi Peter, >> >> I also looked over vmallo.c, but didn't find obvious way to reduce the >> critical section footprint. >> Could you share some hints how to do this? > > > vmap_area_list is an RCU list. > get_vmalloc_info() doesn't need to take the vmap_area_lock at all. > Look at __purge_vmap_area_lazy() for a howto.
Looking at it now ... Thanks, Lin Ming > > Regards, > Peter Hurley > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
