netdev - Re: [PATCH net-next 3/3] bnxt_en: Let the page pool manage the DMA mapping

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Message-ID: <CACKFLinG2n1FUiwncVJrWpSLRPvOnaeoBxjfKdgX1kVRHpwXVw@mail.gmail.com>
Date: Mon, 31 Jul 2023 14:11:59 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Jesper Dangaard Brouer <hawk@...nel.org>, davem@...emloft.net, netdev@...r.kernel.org, 
	edumazet@...gle.com, pabeni@...hat.com, gospo@...adcom.com, 
	bpf@...r.kernel.org, somnath.kotur@...adcom.com, 
	Ilias Apalodimas <ilias.apalodimas@...aro.org>
Subject: Re: [PATCH net-next 3/3] bnxt_en: Let the page pool manage the DMA mapping

On Mon, Jul 31, 2023 at 1:44 PM Jakub Kicinski <kuba@...nel.org> wrote:
> tl;dr just set .max_len = PAGE_SIZE and all will be right.

OK I think I got it now.  The page is only recycled when all the
fragments are recycled and so we can let page pool DMA sync the whole
page at that time.

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