netdev - Re: [PATCH net-next v3 2/3] page_pool: halve BIAS_MAX for fragment multiple user references

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Message-ID: <CAKhg4tJSaGAj07pysE_234zK_cy9b59pBET66EdCLuRS7CfZQg@mail.gmail.com>
Date: Mon, 27 Nov 2023 12:22:02 +0800
From: Liang Chen <liangchen.linux@...il.com>
To: Yunsheng Lin <linyunsheng@...wei.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, 
	pabeni@...hat.com, hawk@...nel.org, ilias.apalodimas@...aro.org, 
	netdev@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH net-next v3 2/3] page_pool: halve BIAS_MAX for fragment
 multiple user references

On Sat, Nov 25, 2023 at 8:01 PM Yunsheng Lin <linyunsheng@...wei.com> wrote:
>
> On 2023/11/24 15:34, Liang Chen wrote:
>
> The title seems a little hard for me to understand, but the description
> below does seem clear to me, so LGTM.
>
> Reviewed-by: Yunsheng Lin <linyunsheng@...wei.com>
>

Thanks! I will change the title to "halve BIAS_MAX for multiple user
references of a fragment"


> > Referring to patch [1], in order to support multiple users referencing the
> > same fragment and prevent overflow from pp_ref_count growing, the initial
> > value of pp_ref_count is halved, leaving room for pp_ref_count to increment
> > before the page is drained.