linux...@kvack.org;
> > linux-kernel@vger.kernel.org; van.free...@gmail.com
> > Subject: Re: [RFC] percpu: decrease pcpu_nr_slots by 1
> >
> > On Tue, Feb 26, 2019 at 12:09:28AM +, Peng Fan wrote:
> > > Hi Dennis,
> > >
> > > > -Original Mes
t; > > To: Peng Fan
> > > Cc: t...@kernel.org; c...@linux.com; linux...@kvack.org;
> > > linux-kernel@vger.kernel.org; van.free...@gmail.com
> > > Subject: Re: [RFC] percpu: decrease pcpu_nr_slots by 1
> > >
> > > On Sun, Feb 24, 2019 at 09:17:08AM +
rg;
> > linux-kernel@vger.kernel.org; van.free...@gmail.com
> > Subject: Re: [RFC] percpu: decrease pcpu_nr_slots by 1
> >
> > On Sun, Feb 24, 2019 at 09:17:08AM +, Peng Fan wrote:
> > > Entry pcpu_slot[pcpu_nr_slots - 2] is wasted with current code logic.
Hi Dennis,
> -Original Message-
> From: den...@kernel.org [mailto:den...@kernel.org]
> Sent: 2019年2月25日 23:24
> To: Peng Fan
> Cc: t...@kernel.org; c...@linux.com; linux...@kvack.org;
> linux-kernel@vger.kernel.org; van.free...@gmail.com
> Subject: Re: [
On Sun, Feb 24, 2019 at 09:17:08AM +, Peng Fan wrote:
> Entry pcpu_slot[pcpu_nr_slots - 2] is wasted with current code logic.
> pcpu_nr_slots is calculated with `__pcpu_size_to_slot(size) + 2`.
> Take pcpu_unit_size as 1024 for example, __pcpu_size_to_slot will
> return max(11 - PCPU_SLOT_BASE_
Entry pcpu_slot[pcpu_nr_slots - 2] is wasted with current code logic.
pcpu_nr_slots is calculated with `__pcpu_size_to_slot(size) + 2`.
Take pcpu_unit_size as 1024 for example, __pcpu_size_to_slot will
return max(11 - PCPU_SLOT_BASE_SHIFT + 2, 1), it is 8, so the
pcpu_nr_slots will be 10.
The chun
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