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

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Message-ID: <ed236fc1-fa6d-5ffc-54db-2c44448ea5fd@huawei.com>
Date: Sat, 25 Nov 2023 20:01:00 +0800
From: Yunsheng Lin <linyunsheng@...wei.com>
To: Liang Chen <liangchen.linux@...il.com>, <davem@...emloft.net>,
	<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<hawk@...nel.org>, <ilias.apalodimas@...aro.org>
CC: <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 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>

> 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.