From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D09F313A272; Tue, 18 Jun 2024 08:18:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718698727; cv=none; b=W0knaFsfDMrSPe4vDk+R4HXZe84cE7GCv0omyYyMQNfgJbyZ5BCkV+np+xid5AEFG/qWGL6fJVBLQEYc0WuGdcyszUna/bE4zRmwPENks90+mdGySzBBHHBJ3CJf4STJRTrzqqRPv99pikjnIMizvqD1mJGyDM/nCmzJcFw9ZLY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718698727; c=relaxed/simple; bh=cPCZEvw0UPMUPOeBUbgA27MdruCVrKhEgVI4A378S2w=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=cU2IOGq5Wy6Fx3i3Euxfpy3oIAtrPDUIgVAe0xkDc+cY0uiKYtNoqU6SHshRfV3DFEZo+eztNhAC4YPGHaQqnjtzryM9kOOCfzW+SZMpeQkG9+SgCfdLewc8CYvQmksSIDAcWkx//QS82x3/zogdjmsBWFp1DkJKdqR1X/PRZ2s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Y8++fdDC; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Y8++fdDC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA194C3277B; Tue, 18 Jun 2024 08:17:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1718698727; bh=cPCZEvw0UPMUPOeBUbgA27MdruCVrKhEgVI4A378S2w=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=Y8++fdDC9VKbFvwON83cjJWbBSxzD+ozwgTVDJOn8bCRpPdlumNUQoDviYy1fqGEt Jnj3xGjIdtDyr55A1y9e78uvdOqz4OFUW9tWtdrBmyg1Sz1Xgr0rQf+ac4k9sTkiCw dUOhYXHmUjjyfVtLNoaMrEAIaZi72/F1qDXpqukz9W+llt6ScFb0TwxHuOHMG0riUR rc8jmRtnG5OMszPoMWSesGHIBgtjH2/1pwezbQaCaCuU+zc59X3LPjmoQOJZUH5DrH i2SGAoQzZDXxpW/sVE6z9UZlqF23engkOpPuLasfs54hAmqDnL3xLVfd2l9YiXHcH5 ruc+vvmjlN5mQ== Message-ID: <3f0fb527-ac58-4f73-b4f1-1e35bf064feb@kernel.org> Date: Tue, 18 Jun 2024 10:17:42 +0200 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 net-next 15/15] net: Move per-CPU flush-lists to bpf_net_context on PREEMPT_RT. To: Sebastian Andrzej Siewior , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Cc: "David S. Miller" , Daniel Bristot de Oliveira , Boqun Feng , Daniel Borkmann , Eric Dumazet , Frederic Weisbecker , Ingo Molnar , Jakub Kicinski , Paolo Abeni , Peter Zijlstra , Thomas Gleixner , Waiman Long , Will Deacon , =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= , Alexei Starovoitov , Andrii Nakryiko , Eduard Zingerman , Hao Luo , Jiri Olsa , John Fastabend , Jonathan Lemon , KP Singh , Maciej Fijalkowski , Magnus Karlsson , Martin KaFai Lau , Song Liu , Stanislav Fomichev , =?UTF-8?B?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vu?= =?UTF-8?Q?sen?= , Yonghong Song , bpf@vger.kernel.org References: <20240618072526.379909-1-bigeasy@linutronix.de> <20240618072526.379909-16-bigeasy@linutronix.de> Content-Language: en-US From: Jesper Dangaard Brouer In-Reply-To: <20240618072526.379909-16-bigeasy@linutronix.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 18/06/2024 09.13, Sebastian Andrzej Siewior wrote: > 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. The lists initialized on first usage (similar to > bpf_net_ctx_get_ri()). > > Cc: "Björn Töpel" > Cc: Alexei Starovoitov > Cc: Andrii Nakryiko > Cc: Eduard Zingerman > Cc: Hao Luo > Cc: Jesper Dangaard Brouer > Cc: Jiri Olsa > Cc: John Fastabend > Cc: Jonathan Lemon > Cc: KP Singh > Cc: Maciej Fijalkowski > Cc: Magnus Karlsson > Cc: Martin KaFai Lau > Cc: Song Liu > Cc: Stanislav Fomichev > Cc: Toke Høiland-Jørgensen > Cc: Yonghong Song > Cc:bpf@vger.kernel.org > Reviewed-by: Toke Høiland-Jørgensen > Signed-off-by: Sebastian Andrzej Siewior Acked-by: Jesper Dangaard Brouer > --- > include/linux/filter.h | 42 ++++++++++++++++++++++++++++++++++++++++++ > kernel/bpf/cpumap.c | 19 +++---------------- > kernel/bpf/devmap.c | 11 +++-------- > net/xdp/xsk.c | 12 ++++-------- > 4 files changed, 52 insertions(+), 32 deletions(-)