From nobody Fri Sep 20 05:28:33 2024 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) (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 2262D1CA95; Mon, 5 Feb 2024 12:45:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.190 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707137162; cv=none; b=J9NAS8dxll13psGfYT2oE5SJJX9lvIsRGcd3KVaxOWxyuelbDJqpRROxYGwKcoNZFG+bSJLKzbtc4UVv6QoCQRaELA8QcXKlMRTlbR60m21rejAyJlHsR9YtzEnmEex6UvIe2DEpfNDXkfDeJLQyEvfEJNebokqni8rfpdumPpQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707137162; c=relaxed/simple; bh=btfQfdCzQGtQEZ7jjludUz5bXAqQCjqD8qh9kCyAsCQ=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=UGWYp8i69UyuUqDWQnO297aV9rt2FQbr9NlB6Lm+gH+USqPoQhVk6HNJsKSJhIN8/zVza1imHv2edZguffcr/EY/cUJ5ZpymlHrQkBu8OFRbLyJ7G076QsXbnOdX4DQWeAuC6HI6Njj4V9HaSTLhvbuMxRm1ay7aEeL/ahkNwlw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.190 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.163]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4TT5gS3XPkz1xnGT; Mon, 5 Feb 2024 20:44:52 +0800 (CST) Received: from dggpemm500005.china.huawei.com (unknown [7.185.36.74]) by mail.maildlp.com (Postfix) with ESMTPS id ECC2F180060; Mon, 5 Feb 2024 20:45:57 +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 15.1.2507.35; Mon, 5 Feb 2024 20:45:57 +0800 From: Yunsheng Lin To: , , CC: , , Yunsheng Lin , Alexander Duyck , Andrew Morton , Eric Dumazet , Subject: [PATCH net-next v5 1/5] mm/page_alloc: modify page_frag_alloc_align() to accept align as an argument Date: Mon, 5 Feb 2024 20:45:01 +0800 Message-ID: <20240205124506.57670-2-linyunsheng@huawei.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20240205124506.57670-1-linyunsheng@huawei.com> References: <20240205124506.57670-1-linyunsheng@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggpemm500005.china.huawei.com (7.185.36.74) Content-Type: text/plain; charset="utf-8" napi_alloc_frag_align() and netdev_alloc_frag_align() accept align as an argument, and they are thin wrappers around the __napi_alloc_frag_align() and __netdev_alloc_frag_align() APIs doing the alignment checking and align mask conversion, in order to call page_frag_alloc_align() directly. The intention here is to keep the alignment checking and the alignmask conversion in in-line wrapper to avoid those kind of operations during execution time since it can usually be handled during compile time. We are going to use page_frag_alloc_align() in vhost_net.c, it need the same kind of alignment checking and alignmask conversion, so split up page_frag_alloc_align into an inline wrapper doing the above operation, and add __page_frag_alloc_align() which is passed with the align mask the original function expected as suggested by Alexander. Signed-off-by: Yunsheng Lin CC: Alexander Duyck --- include/linux/gfp.h | 15 +++++++++++---- mm/page_alloc.c | 8 ++++---- net/core/skbuff.c | 9 ++++++--- 3 files changed, 21 insertions(+), 11 deletions(-) diff --git a/include/linux/gfp.h b/include/linux/gfp.h index de292a007138..28aea17fa59b 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -312,14 +312,21 @@ extern void free_pages(unsigned long addr, unsigned i= nt order); =20 struct page_frag_cache; extern void __page_frag_cache_drain(struct page *page, unsigned int count); -extern void *page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align_mask); +void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fra= gsz, + gfp_t gfp_mask, unsigned int align_mask); + +static inline void *page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align) +{ + WARN_ON_ONCE(!is_power_of_2(align)); + return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); +} =20 static inline void *page_frag_alloc(struct page_frag_cache *nc, unsigned int fragsz, gfp_t gfp_mask) { - return page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); + return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); } =20 extern void page_frag_free(void *addr); diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 150d4f23b010..c0f7e67c4250 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4708,9 +4708,9 @@ void __page_frag_cache_drain(struct page *page, unsig= ned int count) } EXPORT_SYMBOL(__page_frag_cache_drain); =20 -void *page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align_mask) +void *__page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align_mask) { unsigned int size =3D PAGE_SIZE; struct page *page; @@ -4779,7 +4779,7 @@ void *page_frag_alloc_align(struct page_frag_cache *n= c, =20 return nc->va + offset; } -EXPORT_SYMBOL(page_frag_alloc_align); +EXPORT_SYMBOL(__page_frag_alloc_align); =20 /* * Frees a page fragment allocated out of either a compound or order 0 pag= e. diff --git a/net/core/skbuff.c b/net/core/skbuff.c index edbbef563d4d..5b858128463f 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -297,7 +297,8 @@ void *__napi_alloc_frag_align(unsigned int fragsz, unsi= gned int align_mask) =20 fragsz =3D SKB_DATA_ALIGN(fragsz); =20 - return page_frag_alloc_align(&nc->page, fragsz, GFP_ATOMIC, align_mask); + return __page_frag_alloc_align(&nc->page, fragsz, GFP_ATOMIC, + align_mask); } EXPORT_SYMBOL(__napi_alloc_frag_align); =20 @@ -309,13 +310,15 @@ void *__netdev_alloc_frag_align(unsigned int fragsz, = unsigned int align_mask) if (in_hardirq() || irqs_disabled()) { struct page_frag_cache *nc =3D this_cpu_ptr(&netdev_alloc_cache); =20 - data =3D page_frag_alloc_align(nc, fragsz, GFP_ATOMIC, align_mask); + data =3D __page_frag_alloc_align(nc, fragsz, GFP_ATOMIC, + align_mask); } else { struct napi_alloc_cache *nc; =20 local_bh_disable(); nc =3D this_cpu_ptr(&napi_alloc_cache); - data =3D page_frag_alloc_align(&nc->page, fragsz, GFP_ATOMIC, align_mask= ); + data =3D __page_frag_alloc_align(&nc->page, fragsz, GFP_ATOMIC, + align_mask); local_bh_enable(); } return data; --=20 2.33.0