netdev - Re: [PATCH v2 net] r8169: fix NAPI handling under high load

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Message-ID: <20181018225900.GA16653@electric-eye.fr.zoreil.com>
Date:   Fri, 19 Oct 2018 00:59:00 +0200
From:   Francois Romieu <romieu@...zoreil.com>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        David Miller <davem@...emloft.net>,
        Realtek linux nic maintainers <nic_swsd@...ltek.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH v2 net] r8169: fix NAPI handling under high load

Eric Dumazet <eric.dumazet@...il.com> :
[...]
> One has to wonder why rtl8169_poll(), which might be called in a loop under DOS,
> has to call rtl_ack_events() ?

So as to cover a wider temporal range before any event can trigger an
extra irq. I was more worried about irq cost than about IO cost (and
I still am).

-- 
Ueimor