On Fri, Oct 28, 2011 at 6:10 AM, Christoph Lameter wrote: > On Sun, 23 Oct 2011, Gilad Ben-Yossef wrote: > > > +/* Which CPUs have per cpu pages */ > > +cpumask_var_t cpus_with_pcp; > > +static DEFINE_PER_CPU(unsigned long, total_cpu_pcp_count); > > This increases the cache footprint of a hot vm path. Is it possible to do > the same than what you did for slub? Run a loop over all zones when > draining to check for remaining pcp pages and build the set of cpus > needing IPIs temporarily while draining? > > Sounds like a good idea. I will give it a shot. Thanks, Gilad -- Gilad Ben-Yossef Chief Coffee Drinker gilad@benyossef.com Israel Cell: +972-52-8260388 US Cell: +1-973-8260388 http://benyossef.com "I've seen things you people wouldn't believe. Goto statements used to implement co-routines. I watched C structures being stored in registers. All those moments will be lost in time... like tears in rain... Time to die. "