From: Eric Dumazet <edumazet@google.com>
To: David Ahern <dsahern@gmail.com>
Cc: "Maciej Żenczykowski" <maze@google.com>,
"David S . Miller" <davem@davemloft.net>,
netdev <netdev@vger.kernel.org>,
"Eric Dumazet" <eric.dumazet@gmail.com>,
"Alex Belits" <abelits@marvell.com>,
"Nitesh Narayan Lal" <nitesh@redhat.com>,
"Peter Zijlstra" <peterz@infradead.org>
Subject: Re: [PATCH net] net: accept an empty mask in /sys/class/net/*/queues/rx-*/rps_cpus
Date: Tue, 11 Aug 2020 20:27:13 -0700 [thread overview]
Message-ID: <CANn89i+xLvs+Szs5PAMHuhiLUNgXif1KE+Dsb=28=W88YUDp3Q@mail.gmail.com> (raw)
In-Reply-To: <c75f6c00-47ce-4557-151d-f65609b5525c@gmail.com>
On Tue, Aug 11, 2020 at 8:22 PM David Ahern <dsahern@gmail.com> wrote:
>
> On 8/11/20 9:19 PM, Maciej Żenczykowski wrote:
> > Before breakage, post fix:
> >
> > sfp6:~# echo 0 > /sys/class/net/lo/queues/rx-0/rps_cpus
> >
> > With breakage:
> > lpk17:~# echo 0 > /sys/class/net/lo/queues/rx-0/rps_cpus
> > -bash: echo: write error: Invalid argument
> >
>
> ah, so this is recent breakage with 5.9. I had not hit before hence the
> question. thanks for clarifying.
Yup, 07bbecb34106 ("net: Restrict receive packets queuing to
housekeeping CPUs") has been merged only recently.
(This was not in David net-next tree btw, this is why it took us so
long to come to this issue)
next prev parent reply other threads:[~2020-08-12 3:27 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-12 1:34 [PATCH net] net: accept an empty mask in /sys/class/net/*/queues/rx-*/rps_cpus Eric Dumazet
2020-08-12 2:25 ` Maciej Żenczykowski
2020-08-12 3:16 ` David Ahern
2020-08-12 3:18 ` David Ahern
2020-08-12 3:19 ` Maciej Żenczykowski
2020-08-12 3:22 ` David Ahern
2020-08-12 3:27 ` Eric Dumazet [this message]
[not found] ` <CANP3RGc6Gz73Gt3v9M7KYNeNd57o--=3mF6yqdRjqOViG+TG7A@mail.gmail.com>
2020-08-12 8:00 ` peterz
2020-08-12 15:19 ` Eric Dumazet
2020-08-12 12:53 ` Nitesh Narayan Lal
2020-08-12 21:25 ` David Miller
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