From patchwork Thu Jan 5 21:46:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Matthew Wilcox (Oracle)" X-Patchwork-Id: 13090532 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5955C3DA7A for ; Thu, 5 Jan 2023 21:47:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236022AbjAEVrO (ORCPT ); Thu, 5 Jan 2023 16:47:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33992 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235978AbjAEVqf (ORCPT ); Thu, 5 Jan 2023 16:46:35 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B39ED676E7 for ; Thu, 5 Jan 2023 13:46:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:In-Reply-To:References; bh=pjaqcuMc4Up92sXGId9KkIMWv0brrJlvsGM5VypBOHE=; b=vYR3aA0AQcAxw96KvKxdPszlId 78Cgz3CiOlZ2tPNECAohu+AVG1u/Kbpi8PmVNUjhKPdj7jPHuMb6RD5v96SIrmXijzVyYOYs7a9gF /yuxDhnMldcUiF83uz5tMFM5KOVaUbN+v2txtviZ8DXvjT7zPEpDrVc5hLD5fBBF+fFQKKs5BIs6A vTZi3Zi3MzddfzrGQ/0RW+ZLDqqOKKZrszsmiodQOTvB5U61LgckyYQDebmpEsWKzr/3xXlwJq7rT m3RD3BrZw/MaRTTcuBoRml8k1F4kJSpwwtlZUP3hXgoYzONW0EAYYWilufc2zAmaTrBf6vIV8HGAo 0hsAUHDw==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pDY4H-00GWmt-7x; Thu, 05 Jan 2023 21:46:33 +0000 From: "Matthew Wilcox (Oracle)" To: Jesper Dangaard Brouer , Ilias Apalodimas Cc: "Matthew Wilcox (Oracle)" , netdev@vger.kernel.org, linux-mm@kvack.org, Shakeel Butt Subject: [PATCH v2 00/24] Split netmem from struct page Date: Thu, 5 Jan 2023 21:46:07 +0000 Message-Id: <20230105214631.3939268-1-willy@infradead.org> X-Mailer: git-send-email 2.37.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The MM subsystem is trying to reduce struct page to a single pointer. The first step towards that is splitting struct page by its individual users, as has already been done with folio and slab. This patchset does that for netmem which is used for page pools. There are some relatively significant reductions in kernel text size from these changes. They don't appear to affect performance at all, but it's nice to save a bit of memory. v2: - Rebase to next-20230105 - Add kernel-doc for struct netmem - Add mlx5 compilation fixes from Jesper - Folded in minor nit from Alex Duyck Matthew Wilcox (Oracle) (24): netmem: Create new type netmem: Add utility functions page_pool: Add netmem_set_dma_addr() and netmem_get_dma_addr() page_pool: Convert page_pool_release_page() to page_pool_release_netmem() page_pool: Start using netmem in allocation path. page_pool: Convert page_pool_return_page() to page_pool_return_netmem() page_pool: Convert __page_pool_put_page() to __page_pool_put_netmem() page_pool: Convert pp_alloc_cache to contain netmem page_pool: Convert page_pool_defrag_page() to page_pool_defrag_netmem() page_pool: Convert page_pool_put_defragged_page() to netmem page_pool: Convert page_pool_empty_ring() to use netmem page_pool: Convert page_pool_alloc_pages() to page_pool_alloc_netmem() page_pool: Convert page_pool_dma_sync_for_device() to take a netmem page_pool: Convert page_pool_recycle_in_cache() to netmem page_pool: Remove page_pool_defrag_page() page_pool: Use netmem in page_pool_drain_frag() page_pool: Convert page_pool_return_skb_page() to use netmem page_pool: Convert frag_page to frag_nmem xdp: Convert to netmem mm: Remove page pool members from struct page page_pool: Pass a netmem to init_callback() net: Add support for netmem in skb_frag mvneta: Convert to netmem mlx5: Convert to netmem Documentation/networking/page_pool.rst | 5 + drivers/net/ethernet/marvell/mvneta.c | 48 +-- drivers/net/ethernet/mellanox/mlx5/core/en.h | 10 +- .../net/ethernet/mellanox/mlx5/core/en/txrx.h | 4 +- .../net/ethernet/mellanox/mlx5/core/en/xdp.c | 24 +- .../net/ethernet/mellanox/mlx5/core/en/xdp.h | 2 +- .../net/ethernet/mellanox/mlx5/core/en_main.c | 12 +- .../net/ethernet/mellanox/mlx5/core/en_rx.c | 130 +++++---- include/linux/mm_types.h | 22 -- include/linux/skbuff.h | 11 + include/net/page_pool.h | 209 +++++++++++-- include/trace/events/page_pool.h | 28 +- net/bpf/test_run.c | 4 +- net/core/page_pool.c | 274 +++++++++--------- net/core/xdp.c | 7 +- 15 files changed, 471 insertions(+), 319 deletions(-) Reviewed-by: Jesse Brandeburg