From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f47.google.com (mail-wm1-f47.google.com [209.85.128.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 14D8A3E5A2C for ; Mon, 27 Jul 2026 09:03:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.47 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785142996; cv=none; b=e3jsRyPdPrQz/uT1yp7uXSMGzTABsGK3FUGIgrq4jyZob5meLZON2pYVXze+wMuQRoH5u3ZtYsYQV1KXcxKHxy1qfGsOj0zwK202M0yEN6gG0Gaus5j+MxIkxrJplDUFAe/bUdUjO64CN6c7B3OeqcXTqQcGjCFDkxznrPjMqS4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785142996; c=relaxed/simple; bh=kTDH5S4ysmo2sFaieTu2UjAmwNg8TwOXckYezAXHhh0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jZHaVoUkR5HeGxl3G+Hp5YsrgG3D9NUNA2QkPfXnjV/cK6kDWdvAxHp+iKaykHeZHk6QcH+sSRnfzxicB/1lxi8e5zxpabZoG9xiitp9Y59fYkgru7BqGn4Es+BcR2tkLGUWv5nvnyjDMHbCViJR2Hibxn0bDq4ZIq61HUkHniw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=blackwall.org; spf=none smtp.mailfrom=blackwall.org; dkim=pass (2048-bit key) header.d=blackwall.org header.i=@blackwall.org header.b=b3GviCnP; arc=none smtp.client-ip=209.85.128.47 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=blackwall.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=blackwall.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=blackwall.org header.i=@blackwall.org header.b="b3GviCnP" Received: by mail-wm1-f47.google.com with SMTP id 5b1f17b1804b1-4954aff6088so20713745e9.3 for ; Mon, 27 Jul 2026 02:03:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=blackwall.org; s=google; t=1785142993; x=1785747793; darn=vger.kernel.org; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=edzEg2J/oLqzfs9TMR6atfH/lM7LkpfPbZs2uM8pJC4=; b=b3GviCnPq9i1aD7Y5y7bzKgg6il0W8m9XaPJQ4I12+i4aM5U6hRMuNxR65SpN7uUHQ PWnxjTKHglMT3cV+qGust9WX/AL2ARb8BKzITWhH8Vh121IvbLyE3dAKYnDNm9GGZ1pe 6hJ5U102tnuCTKYGutx5K+IuXtT/NE+AL8XrT0tWppE8Z0LndTSrSPMSw3QrO5E3CDOH Ypzn5IVWR0x3oRtAyqN2N2ESOCYQH0oi8Ggm1mTvLI7vtBxBg0w2FqiCifuHZni5/e57 BT227eFMxD0Uq4pu2DXaipPgvWnq23gJCyk2ERmhKXNtOcpYOSKuQyH6cK2zDOMIDjI+ n0zQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785142993; x=1785747793; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=edzEg2J/oLqzfs9TMR6atfH/lM7LkpfPbZs2uM8pJC4=; b=paYrzJxLxGuNXeUXsmG45vIO258eBN/uZkz4ZUAYrN83fjv113n0uqjjlZeTTERzFt DsNV0c2LkMzixvbz/F+LXqhNd+c2NhC6ANvE45a1YI26UQmdF99h+h9zzJaSXcuhs7CL TDhoMLPE1xN+hK0OzBAqC7LoSBWfyxgM2dWTfWLFFBvIk/Yy4x7wSUob2ON57C/Wq59x K+8Er1ufiBMJ8ZyYZ1ZqC934TiQXpzgkvgivdIdGfco5Z7VfZrafQBRT9T3pkEFs6Zgc l9bS9oc/X925uCRHm5YWuphaqCdl06BdCeK2+wSaI3YsEfrXTgT9zWM9IGWuW5UVYHIz kGdQ== X-Forwarded-Encrypted: i=1; AHgh+RoxwxhS1D1JLtQplhu/DDD9fqeBgKumpYAKtsCZ4tXK8LXwlvjwlSnznQhytHeFNM+yk73Ry3T48fFQtlQ=@vger.kernel.org X-Gm-Message-State: AOJu0YxFdCuW63aGh2jFtqe4ELoacH/XccOBixW4oMVuSIqY1n5afFfz f9VBcjVNAHtrMpBGCDtDJ1jRCxE9cpFrbLFPH6JO8Qk0SgILS2AQiYVwAL/SJ8j/dX8= X-Gm-Gg: AR+sD13WLhxTMeNdjFUrzcQr3ZeQKLJu0o2hinRKhB7ciQsRrgUupViaj8ARLLrlBbT 8qc4abbmbKue9tb6bPCRvN+CpViwblVa2qLkec1+flHVj1P+k7FyexpXzInCXykdEghQMe+8O// dpffnUjunWK1eiyq9jgnhXUl08S0hz18f8qIxlELuEtm1iq3E8/ppuYMGTPrrZMg6+fFvCXFEa0 cx2r8v7F3oStXdLi5A+z9yRolWu2ReN7Q9yr29h1FxKM0gmQiUbmU8kgpIHcEkq15ydzea00H91 nyS6fMw9lrI0bFlQFnjQBYSyw0v2Z8wsM+mTBSMBnzv5UNBVdSWtKBL9mwmW/yU5hHEIciljBT7 UmVxkvSAnqDlGBOIRoFaiOLmyGbP/F/SG4Bu6frgSwFZ8T9n7GbC2N7t6iEaAT+HPgALjwwuQcw == X-Received: by 2002:a05:600c:3113:b0:493:c8f7:3631 with SMTP id 5b1f17b1804b1-496b570dacdmr90046155e9.22.1785142992910; Mon, 27 Jul 2026 02:03:12 -0700 (PDT) Received: from localhost ([109.160.73.171]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-496b4ed5f93sm333309535e9.1.2026.07.27.02.03.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Jul 2026 02:03:11 -0700 (PDT) Date: Mon, 27 Jul 2026 12:03:06 +0300 From: Nikolay Aleksandrov To: Bobby Eshleman Cc: Donald Hunter , Jakub Kicinski , "David S. Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Andrew Lunn , Gerd Hoffmann , Vivek Kasireddy , Sumit Semwal , Christian =?iso-8859-1?Q?K=F6nig?= , Shuah Khan , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-kselftest@vger.kernel.org, sdf@fomichev.me, daniel@iogearbox.net, almasrymina@google.com, matttbe@kernel.org, skhawaja@google.com, dw@davidwei.uk, Joe Damato , Bobby Eshleman Subject: Re: [PATCH net-next v6 2/3] selftests/net: ncdevmem: add -b option to set rx-page-size on bind Message-ID: References: <20260724-tcpdm-large-niovs-v6-0-7975f62cdfbb@meta.com> <20260724-tcpdm-large-niovs-v6-2-7975f62cdfbb@meta.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260724-tcpdm-large-niovs-v6-2-7975f62cdfbb@meta.com> On Fri, Jul 24, 2026 at 02:21:16PM -0700, Bobby Eshleman wrote: > From: Bobby Eshleman > > Add -b to request a non-default niov size via > NETDEV_A_DMABUF_RX_PAGE_SIZE. When the value exceeds PAGE_SIZE, > udmabuf_alloc() switches to an MFD_HUGETLB-backed memfd so each 2 MB > hugepage produces one naturally-aligned sg entry. > > Signed-off-by: Bobby Eshleman > Acked-by: Stanislav Fomichev > --- > tools/testing/selftests/drivers/net/hw/ncdevmem.c | 36 +++++++++++++++++++++-- > 1 file changed, 33 insertions(+), 3 deletions(-) > Reviewed-by: Nikolay Aleksandrov