Re: [RFC] CMA page migration failure due to buffers on bh_lru

[Gioh Kim]

2014-06-27 ìì 12:57, Michal Nazarewicz ì ê:
> On Tue, Jun 24 2014, Gioh Kim <gioh.kim@xxxxxxx> wrote:
> > Hello,
> >
> > I am trying to apply CMA feature for my platform.
> > My kernel version, 3.10.x, is not allocating memory from CMA area so that I applied
> > a Joonsoo Kim's patch (https://lkml.org/lkml/2014/5/28/64).
> > Now my platform can use CMA area effectively.
> >
> > But I have many failures to allocate memory from CMA area.
> > I found the same situation to Laura Abbott's patch descrbing,
> > https://lkml.org/lkml/2012/8/31/313,
> > that releases buffer-heads attached at CPU's LRU list.
> >
> > If Joonsoo's patch is applied and/or CMA feature is applied more and more,
> > buffer-heads problem is going to be serious definitely.
> >
> > Please look into the Laura's patch again.
> > I think it must be applied with Joonsoo's patch.
>
> Just to make sure I understood you correctly, you're saying Laura's
> patch at <https://lkml.org/lkml/2012/8/31/313> fixes your issue?

Yes, it is.
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