From: Ilias Apalodimas <ilias.apalodimas@linaro.org>
To: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>,
netdev@vger.kernel.org, grygorii.strashko@ti.com,
jakub.kicinski@netronome.com, daniel@iogearbox.net,
john.fastabend@gmail.com, ast@kernel.org,
linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org
Subject: Re: [PATCH] net: core: page_pool: add user refcnt and reintroduce page_pool_destroy
Date: Wed, 3 Jul 2019 00:15:36 +0300 [thread overview]
Message-ID: <20190702211536.GA22618@apalos> (raw)
In-Reply-To: <20190702230241.3be6d787@carbon>
Hi Jesper,
Getting late here, i'll respond in detail tomorrow. One point though
[...]
>
> This special use-case, seems confined to your driver. And Ilias told me
> that XDP is not really a performance benefit for this driver as the HW
> PPS-limit is hit before the XDP and netstack limit. I ask, does it
> make sense to add XDP to this driver, if it complicates the code for
> everybody else?
I think yes. This is a widely used driver on TI embedded devices so having XDP
to play along is a nice feature. It's also the first and only armv7 we have
supporting this. Ivan already found a couple of issues due to the 32-bit
architecture he is trying to fix, i think there's real benefit in having that,
performance aside.
I fully agree we should not impact the performance of the API to support a
special hardware though. I'll have a look on the 2 solutions tomorrow, but the
general approach on this one should be 'the simpler the better'
Cheers
/Ilias
>
> --
> 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:[~2019-07-02 21:15 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-30 17:23 [PATCH v5 net-next 0/6] net: ethernet: ti: cpsw: Add XDP support Ivan Khoronzhuk
2019-06-30 17:23 ` [PATCH v5 net-next 1/6] xdp: allow same allocator usage Ivan Khoronzhuk
2019-07-01 11:40 ` Jesper Dangaard Brouer
2019-07-02 10:27 ` Ivan Khoronzhuk
2019-07-02 14:46 ` Jesper Dangaard Brouer
2019-07-02 14:53 ` Ivan Khoronzhuk
2019-07-02 14:53 ` Ivan Khoronzhuk
2019-06-30 17:23 ` [PATCH v5 net-next 2/6] net: ethernet: ti: davinci_cpdma: add dma mapped submit Ivan Khoronzhuk
2019-06-30 17:23 ` [PATCH v5 net-next 3/6] net: ethernet: ti: davinci_cpdma: return handler status Ivan Khoronzhuk
2019-06-30 17:23 ` [PATCH v5 net-next 4/6] net: ethernet: ti: davinci_cpdma: allow desc split while down Ivan Khoronzhuk
2019-06-30 17:23 ` [PATCH v5 net-next 5/6] net: ethernet: ti: cpsw_ethtool: allow res " Ivan Khoronzhuk
2019-06-30 17:23 ` [PATCH v5 net-next 6/6] net: ethernet: ti: cpsw: add XDP support Ivan Khoronzhuk
2019-07-01 16:19 ` Jesper Dangaard Brouer
2019-07-01 18:09 ` Ilias Apalodimas
2019-07-02 11:37 ` Ivan Khoronzhuk
2019-07-02 13:39 ` Jesper Dangaard Brouer
2019-07-02 14:24 ` Ivan Khoronzhuk
2019-07-02 14:31 ` [PATCH] net: core: page_pool: add user refcnt and reintroduce page_pool_destroy Jesper Dangaard Brouer
2019-07-02 14:44 ` Ivan Khoronzhuk
2019-07-02 14:52 ` Jesper Dangaard Brouer
2019-07-02 14:56 ` Ivan Khoronzhuk
2019-07-02 15:10 ` Jesper Dangaard Brouer
2019-07-02 15:21 ` Ivan Khoronzhuk
2019-07-02 18:29 ` Jesper Dangaard Brouer
2019-07-02 18:58 ` Ivan Khoronzhuk
2019-07-02 20:28 ` Ivan Khoronzhuk
2019-07-02 21:02 ` Jesper Dangaard Brouer
2019-07-02 21:15 ` Ilias Apalodimas [this message]
2019-07-02 21:41 ` Ivan Khoronzhuk
2019-07-03 7:26 ` [PATCH v5 net-next 6/6] net: ethernet: ti: cpsw: add XDP support Jesper Dangaard Brouer
2019-07-03 7:38 ` Ivan Khoronzhuk
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