linux-kernel - Re: [PATCH] percpu-refcount: relax limit on percpu_ref

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Message-ID: <096be5c0-a69f-4553-5507-5fcdecc1ea20@oracle.com>
Date:   Tue, 11 Sep 2018 22:22:22 +0800
From:   "jianchao.wang" <jianchao.w.wang@...cle.com>
To:     Ming Lei <ming.lei@...hat.com>
Cc:     linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>,
        Kent Overstreet <kent.overstreet@...il.com>,
        linux-block@...r.kernel.org
Subject: Re: [PATCH] percpu-refcount: relax limit on percpu_ref_reinit()

Hi Ming

On 09/11/2018 04:20 PM, Ming Lei wrote:
> We only check the 'whole counting' at atomic mode, so it is the atomic
> part('ref->count'), please see percpu_ref_put_many(), in which ref->release()
> is only called at atomic mode.
> 
> At percpu mode, the ref-count is only decreased/increased on the local CPU.

Yes, I got it.
Thanks for your kindly response.

Sincerely
Jianchao