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From: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= <toke@redhat.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
 linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>, Daniel Bristot de Oliveira
 <bristot@kernel.org>, Boqun Feng <boqun.feng@gmail.com>, Daniel Borkmann
 <daniel@iogearbox.net>, Eric Dumazet <edumazet@google.com>, Frederic
 Weisbecker <frederic@kernel.org>, Ingo Molnar <mingo@redhat.com>, Jakub
 Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, Peter
 Zijlstra <peterz@infradead.org>, Thomas Gleixner <tglx@linutronix.de>,
 Waiman Long <longman@redhat.com>, Will Deacon <will@kernel.org>, Sebastian
 Andrzej Siewior <bigeasy@linutronix.de>, =?utf-8?B?QmrDtnJuIFTDtnBlbA==?=
 <bjorn@kernel.org>,
 Alexei Starovoitov <ast@kernel.org>, Andrii Nakryiko <andrii@kernel.org>,
 Eduard Zingerman <eddyz87@gmail.com>, Hao Luo <haoluo@google.com>, Jesper
 Dangaard Brouer <hawk@kernel.org>, Jiri Olsa <jolsa@kernel.org>, John
 Fastabend <john.fastabend@gmail.com>, Jonathan Lemon
 <jonathan.lemon@gmail.com>, KP Singh <kpsingh@kernel.org>, Maciej
 Fijalkowski <maciej.fijalkowski@intel.com>, Magnus Karlsson
 <magnus.karlsson@intel.com>, Martin KaFai Lau <martin.lau@linux.dev>, Song
 Liu <song@kernel.org>, Stanislav Fomichev <sdf@google.com>, Yonghong Song
 <yonghong.song@linux.dev>, bpf@vger.kernel.org
Subject: Re: [PATCH v4 net-next 14/14] net: Move per-CPU flush-lists to
 bpf_net_context on PREEMPT_RT.
In-Reply-To: <20240604154425.878636-15-bigeasy@linutronix.de>
References: <20240604154425.878636-1-bigeasy@linutronix.de>
 <20240604154425.878636-15-bigeasy@linutronix.de>
Date: Wed, 05 Jun 2024 12:20:41 +0200
Message-ID: <87cyovadxi.fsf@toke.dk>
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Sebastian Andrzej Siewior <bigeasy@linutronix.de> writes:

> The per-CPU flush lists, which are accessed from within the NAPI callback
> (xdp_do_flush() for instance), are per-CPU. There are subject to the
> same problem as struct bpf_redirect_info.
>
> Add the per-CPU lists cpu_map_flush_list, dev_map_flush_list and
> xskmap_map_flush_list to struct bpf_net_context. Add wrappers for the
> access.
>
> Cc: "Bj=C3=B6rn T=C3=B6pel" <bjorn@kernel.org>
> Cc: Alexei Starovoitov <ast@kernel.org>
> Cc: Andrii Nakryiko <andrii@kernel.org>
> Cc: Eduard Zingerman <eddyz87@gmail.com>
> Cc: Hao Luo <haoluo@google.com>
> Cc: Jesper Dangaard Brouer <hawk@kernel.org>
> Cc: Jiri Olsa <jolsa@kernel.org>
> Cc: John Fastabend <john.fastabend@gmail.com>
> Cc: Jonathan Lemon <jonathan.lemon@gmail.com>
> Cc: KP Singh <kpsingh@kernel.org>
> Cc: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
> Cc: Magnus Karlsson <magnus.karlsson@intel.com>
> Cc: Martin KaFai Lau <martin.lau@linux.dev>
> Cc: Song Liu <song@kernel.org>
> Cc: Stanislav Fomichev <sdf@google.com>
> Cc: Toke H=C3=B8iland-J=C3=B8rgensen <toke@redhat.com>
> Cc: Yonghong Song <yonghong.song@linux.dev>
> Cc: bpf@vger.kernel.org
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

Reviewed-by: Toke H=C3=B8iland-J=C3=B8rgensen <toke@redhat.com>