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 561C239B4A0; Tue, 17 Mar 2026 22:20:47 +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=1773786047; cv=none; b=OPZCstjHowJ0u2TR2eOp5jKbl+rn1gHqxJDPqOm++6ZAJRS/+/gDD0XS6hIyZOM/9Cjo47pZGWnJvmVQAfsOYmnGLE45IuDXhKaEOAwPn5S8VYV5EuPhce2lbc2du6Didai8/5BO4I9kwgkPeRimb18rZb8bKfubqbQkv9bQy6Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773786047; c=relaxed/simple; bh=nzKsTNfCaWoKpLestak1KDClGw/UYRbka/YqvLVh9rs=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Gs4SDEaC4aAtCkU9Vol8Bh/NOw/IFWmrPYcYnl9cp90sYIfUcgHj5uWWvS2LChacu0eWgnFXrDXvETqwXC7UO0lJtlkaXBwoA49bbl0FD6K6WgYKzw3PlpkFY5TpomqkKSkcDYrrOBMu4Burv/q7t7GBtNxjjs3GZmvJ1rx9C6A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pAFNvBuS; 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="pAFNvBuS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 81BC8C2BC9E; Tue, 17 Mar 2026 22:20:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773786046; bh=nzKsTNfCaWoKpLestak1KDClGw/UYRbka/YqvLVh9rs=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=pAFNvBuSHUZzsl/I9NLulqf6RdIC/v9VKemm6HlXkg9p1ZxHVjgHweNNAnYPq1nJ8 bPR1AIZaki4A61+hMziTq8xuvcs7yGc2orGcg1ri4OYsAXOgWOGbHUJFSvJzLe8VjU Qumf69SE3iREr7UhHdD0Y0Rj8fzn5gHudz/x2gZzZzT4otQ8miYOMhMIEfew8MJh7d ahHbK+h1p/jcpFKGicWQ/EfyvKZ3ipRtdNxSQUDDyrdbD0hW+u+uTPiyBj/qaWowwk 5T//8+b/frZkYgx0PfgF/ADicJDc8VrQmWCBxxkgXzCOWJFXnpEIWajdFry1zrmzvG oh9sKBCGIzrlw== Date: Tue, 17 Mar 2026 15:20:45 -0700 From: Jakub Kicinski To: Alexei Starovoitov Cc: Martin KaFai Lau , Maciej Fijalkowski , bpf , Network Development , "Karlsson, Magnus" , Stanislav Fomichev , Paolo Abeni , Simon Horman , Alexei Starovoitov , Daniel Borkmann Subject: Re: [PATCH v2 bpf-next] xsk: use __xsk_rcv_zc_safe for ZC multi-buffer Rx processing Message-ID: <20260317152045.58c719a7@kernel.org> In-Reply-To: References: <20260316140557.461288-1-maciej.fijalkowski@intel.com> <20260316171200.4b8a96a0@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Tue, 17 Mar 2026 08:09:08 -0700 Alexei Starovoitov wrote: > On Mon, Mar 16, 2026 at 5:12=E2=80=AFPM Jakub Kicinski = wrote: > > On Mon, 16 Mar 2026 15:05:57 +0100 Maciej Fijalkowski wrote: =20 > > > Commit f620af11c27b ("xsk: avoid double checking against rx queue bei= ng > > > full") addressed a case in copy mode, when working with multi-buffer > > > xdp_buff, where we were peeking onto XSK Rx queue twice, to find out = if > > > there is a space to produce descriptors. > > > > > > Adjust ZC path to follow the same principle. =20 > > > > Acked-by: Jakub Kicinski =20 >=20 > Do you guys need it in net-next in this merge window ? >=20 > We have nothing in bpf-next/net so far, so should be fine > to take this patch into net-next directly? Somehow __xsk_rcv_zc_safe() landed in bpf-next/master f620af11c27b8ec9 So I think we have limited number of possible moves now :)