From: Jesper Dangaard Brouer <brouer@redhat.com>
To: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Cc: grygorii.strashko@ti.com, hawk@kernel.org, davem@davemloft.net,
ast@kernel.org, linux-kernel@vger.kernel.org,
linux-omap@vger.kernel.org, xdp-newbies@vger.kernel.org,
ilias.apalodimas@linaro.org, netdev@vger.kernel.org,
daniel@iogearbox.net, jakub.kicinski@netronome.com,
john.fastabend@gmail.com, brouer@redhat.com
Subject: Re: [PATCH v2 net-next 7/7] net: ethernet: ti: cpsw: add XDP support
Date: Fri, 31 May 2019 18:32:41 +0200 [thread overview]
Message-ID: <20190531183241.255293bc@carbon> (raw)
In-Reply-To: <20190531162523.GA3694@khorivan>
On Fri, 31 May 2019 19:25:24 +0300 Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> wrote:
> On Fri, May 31, 2019 at 05:46:43PM +0200, Jesper Dangaard Brouer wrote:
> >
> >From below code snippets, it looks like you only allocated 1 page_pool
> >and sharing it with several RX-queues, as I don't have the full context
> >and don't know this driver, I might be wrong?
> >
> >To be clear, a page_pool object is needed per RX-queue, as it is
> >accessing a small RX page cache (which protected by NAPI/softirq).
>
> There is one RX interrupt and one RX NAPI for all rx channels.
So, what are you saying?
You _are_ sharing the page_pool between several RX-channels, but it is
safe because this hardware only have one RX interrupt + NAPI instance??
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
next prev parent reply other threads:[~2019-05-31 16:32 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-30 18:20 [PATCH v2 net-next 0/7] net: ethernet: ti: cpsw: Add XDP support Ivan Khoronzhuk
2019-05-30 18:20 ` [PATCH v2 net-next 1/7] net: page_pool: add helper function to retrieve dma addresses Ivan Khoronzhuk
2019-05-30 18:20 ` [PATCH v2 net-next 2/7] net: page_pool: add helper function to unmap " Ivan Khoronzhuk
2019-05-30 18:20 ` [PATCH v2 net-next 3/7] net: ethernet: ti: cpsw: use cpsw as drv data Ivan Khoronzhuk
2019-06-01 10:49 ` grygorii
2019-06-01 10:49 ` grygorii
2019-05-30 18:20 ` [PATCH v2 net-next 4/7] net: ethernet: ti: cpsw_ethtool: simplify slave loops Ivan Khoronzhuk
2019-06-01 10:55 ` grygorii
2019-06-01 10:55 ` grygorii
2019-05-30 18:20 ` [PATCH v2 net-next 5/7] net: ethernet: ti: davinci_cpdma: add dma mapped submit Ivan Khoronzhuk
2019-05-30 18:20 ` [PATCH v2 net-next 6/7] net: ethernet: ti: davinci_cpdma: return handler status Ivan Khoronzhuk
2019-05-30 18:20 ` [PATCH v2 net-next 7/7] net: ethernet: ti: cpsw: add XDP support Ivan Khoronzhuk
2019-05-31 15:46 ` Jesper Dangaard Brouer
2019-05-31 15:46 ` Jesper Dangaard Brouer
2019-05-31 16:25 ` Ivan Khoronzhuk
2019-05-31 16:25 ` Ivan Khoronzhuk
2019-05-31 16:32 ` Jesper Dangaard Brouer [this message]
2019-05-31 17:03 ` Ivan Khoronzhuk
2019-05-31 22:08 ` Saeed Mahameed
2019-05-31 23:00 ` Ivan Khoronzhuk
2019-05-31 22:37 ` Jesper Dangaard Brouer
2019-05-31 23:27 ` Ivan Khoronzhuk
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