From: Eric Dumazet <eric.dumazet@gmail.com>
To: Alexei Starovoitov <ast@fb.com>,
Eric Dumazet <eric.dumazet@gmail.com>,
Song Liu <songliubraving@fb.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>,
netdev <netdev@vger.kernel.org>,
"intel-wired-lan@lists.osuosl.org"
<intel-wired-lan@lists.osuosl.org>,
Kernel Team <Kernel-team@fb.com>,
"stable@vger.kernel.org" <stable@vger.kernel.org>,
Alexei Starovoitov <ast@kernel.org>
Subject: Re: [PATCH net] ixgbe: check return value of napi_complete_done()
Date: Fri, 21 Sep 2018 07:59:45 -0700 [thread overview]
Message-ID: <e6afa0d0-ba22-8205-076c-6a259a9f1b52@gmail.com> (raw)
In-Reply-To: <71fd1305-17ad-2bdc-c123-9bc0ab37b0a4@fb.com>
On 09/21/2018 07:55 AM, Alexei Starovoitov wrote:
>
> should we remove ndo_poll_controller then?
> My understanding that the patch helps by not letting
> drivers do napi_schedule() for all queues into this_cpu, right?
> But most of the drivers do exactly that in their ndo_poll_controller
> implementations. Means most of the drivers will experience
> this nasty behavior.
>
Some legacy drivers do not use NAPI yet, but provide ndo_poll_controller()
I believe users caring about system behavior with multi queue NIC are
all using NAPI enabled drivers, so this should be fine.
next prev parent reply other threads:[~2018-09-21 20:49 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-20 19:01 [PATCH net] ixgbe: check return value of napi_complete_done() Song Liu
2018-09-20 20:35 ` Eric Dumazet
2018-09-20 21:01 ` Jeff Kirsher
2018-09-20 22:42 ` Song Liu
2018-09-20 23:22 ` Eric Dumazet
2018-09-20 23:43 ` Song Liu
2018-09-20 23:49 ` Eric Dumazet
2018-09-21 7:17 ` Song Liu
2018-09-21 13:33 ` Eric Dumazet
2018-09-21 14:55 ` Alexei Starovoitov
2018-09-21 14:59 ` Eric Dumazet [this message]
2018-09-21 15:14 ` Alexei Starovoitov
2018-09-21 15:43 ` Eric Dumazet
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