From patchwork Tue May 16 12:47:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yunsheng Lin X-Patchwork-Id: 13243216 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0A6CAC77B75 for ; Tue, 16 May 2023 14:00:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=PzkXx36wvK+y7wC2rjBGawUXoDa4/nKvYAkC6j+dWm0=; b=XW46eKhhvISPQA/TlOoZgMuzqU D1kohRiESQlacWYuzYZMbgMyMYNu2USNTj4IX/7HTD88Hl/oXPhChEPPdPcV00ltdekr+Vj6c2gn6 uSNRPgdQmmeaUA+n8TsNLQkUW5csJReTgIHyCJnREQmov99ZhZDW2if5eLMzgiYo4zySJqjzNDP+6 uQ3YUCorCnGRNbTgOx/YMrK1spj67sBysRUBifN9OgbGqPnHrRwQlVYFsWr9NUs8DvAQLIKB3JjTh jZ5FEpb3mAGBlE7RU5L2QnhIGvQBkPbYy4EXGkoiBz1sEfAyrhIBnjex5r3qqtVF0syiSpUuZmp13 cgcewSig==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pyvE4-0060h8-1p; Tue, 16 May 2023 14:00:28 +0000 Received: from szxga01-in.huawei.com ([45.249.212.187]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pyu7w-005mV9-10; Tue, 16 May 2023 12:50:06 +0000 Received: from dggpemm500005.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4QLGHG3w9TzsRs9; Tue, 16 May 2023 20:47:54 +0800 (CST) Received: from localhost.localdomain (10.69.192.56) by dggpemm500005.china.huawei.com (7.185.36.74) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Tue, 16 May 2023 20:49:53 +0800 From: Yunsheng Lin To: , , CC: , , Yunsheng Lin , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Matthias Brugger , AngeloGioacchino Del Regno , , , Subject: [RFC 0/3] support non-frag page for page_pool_alloc_frag() Date: Tue, 16 May 2023 20:47:58 +0800 Message-ID: <20230516124801.2465-1-linyunsheng@huawei.com> X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 X-Originating-IP: [10.69.192.56] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggpemm500005.china.huawei.com (7.185.36.74) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230516_055004_579995_FF5B1B10 X-CRM114-Status: UNSURE ( 8.30 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org In [1], there is a use case to use frag support in page pool to reduce memory usage, and it may request different frag size depending on the head/tail room space for xdp_frame/shinfo and mtu/packet size. When the requested frag size is large enough that a single page can not be split into more than one frag, using frag support only have performance penalty because of the extra frag count handling for frag support. So this patchset provides a way for user to fail back to non-frag page depending on the user's request. 1. https://patchwork.kernel.org/project/netdevbpf/patch/d3ae6bd3537fbce379382ac6a42f67e22f27ece2.1683896626.git.lorenzo@kernel.org/ Yunsheng Lin (3): page_pool: unify frag page and non-frag page handling page_pool: support non-frag page for page_pool_alloc_frag() page_pool: introduce 'struct page_pool_frag' .../net/ethernet/hisilicon/hns3/hns3_enet.c | 16 +++--- drivers/net/wireless/mediatek/mt76/mt76.h | 9 ++-- include/net/page_pool.h | 51 ++++++++++++++----- net/core/page_pool.c | 45 +++++++++++----- 4 files changed, 86 insertions(+), 35 deletions(-)