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Message-ID: <20231008134824.GG831234@kernel.org> Date: Sun, 8 Oct 2023 15:48:24 +0200 From: Simon Horman <horms@...nel.org> To: Sebastian Andrzej Siewior <bigeasy@...utronix.de> Cc: Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org, bpf@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, Björn Töpel <bjorn@...nel.org>, Alexei Starovoitov <ast@...nel.org>, Andrii Nakryiko <andrii@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Eric Dumazet <edumazet@...gle.com>, Hao Luo <haoluo@...gle.com>, Jesper Dangaard Brouer <hawk@...nel.org>, Jiri Olsa <jolsa@...nel.org>, John Fastabend <john.fastabend@...il.com>, Jonathan Lemon <jonathan.lemon@...il.com>, KP Singh <kpsingh@...nel.org>, Maciej Fijalkowski <maciej.fijalkowski@...el.com>, Magnus Karlsson <magnus.karlsson@...el.com>, Martin KaFai Lau <martin.lau@...ux.dev>, Paolo Abeni <pabeni@...hat.com>, Song Liu <song@...nel.org>, Stanislav Fomichev <sdf@...gle.com>, Thomas Gleixner <tglx@...utronix.de>, Yonghong Song <yonghong.song@...ux.dev> Subject: Re: [PATCH bpf-next v2] net: Add a warning if NAPI cb missed xdp_do_flush(). On Fri, Oct 06, 2023 at 05:49:33PM +0200, Sebastian Andrzej Siewior wrote: > A few drivers were missing a xdp_do_flush() invocation after > XDP_REDIRECT. > > Add three helper functions each for one of the per-CPU lists. Return > true if the per-CPU list is non-empty and flush the list. > Add xdp_do_check_flushed() which invokes each helper functions and > creats a warning if one of the functions had a non-empty list. nit: creates > Hide everything behind CONFIG_DEBUG_NET. > > Suggested-by: Jesper Dangaard Brouer <hawk@...nel.org> > Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de> ...
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