From nobody Fri Sep 20 01:29:02 2024 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) (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 C5617197545; Wed, 5 Jun 2024 13:36:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.188 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717594576; cv=none; b=d5mLV356D0WhVCfEcfhYBt3gPtwcvAwA25WtZZrUZrH/3ApxH3XXaPhasStG8gatcWoVuy8raBMCVqXtIQEiWMxjS5F9V1Cz55ovu2d7shkvNygG1uFkIFI7dyz27klXOsTS+DjBzVHn/JwQWpWRhBdP461orkorwm8J6Aw5xrQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717594576; c=relaxed/simple; bh=0T4vPE1RTZrI298cvRSUQX1a1z3jGmU3ldo91M9AQ+I=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=PnZXMSn2IsPGshIpQ29bgndGIRc5BciuljmwMQT5aOBs8/IUMgIV3XI5UayshhYQY7CY3U2DqejCvUy3hiF1DwLK8qfTSXfzO7TRg6Ede8QQqfdYwT55EZzj4HGeViLAUs9b5wbBCg63PtiFjx0bh6JkMZpgnh+69NlBrirWp/A= 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=45.249.212.188 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 [172.19.163.252]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4VvSzQ6mJyzmXlr; Wed, 5 Jun 2024 21:31:30 +0800 (CST) Received: from dggpemm500005.china.huawei.com (unknown [7.185.36.74]) by mail.maildlp.com (Postfix) with ESMTPS id 52820180085; Wed, 5 Jun 2024 21:36:04 +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_256_GCM_SHA384) id 15.1.2507.39; Wed, 5 Jun 2024 21:36:04 +0800 From: Yunsheng Lin To: , , CC: , , Yunsheng Lin , Alexander Duyck , Andrew Morton , Subject: [PATCH net-next v6 03/15] mm: page_frag: use free_unref_page() to free page fragment Date: Wed, 5 Jun 2024 21:32:53 +0800 Message-ID: <20240605133306.11272-4-linyunsheng@huawei.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20240605133306.11272-1-linyunsheng@huawei.com> References: <20240605133306.11272-1-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" free_the_page() used by page_frag call free_unref_page() or __free_pages_ok() depending on pcp_allowed_order(), as the max order of page allocated for page_frag is 3, the checking in pcp_allowed_order() is unnecessary. So call free_unref_page() directly to free a page_frag page to aovid the unnecessary checking. As the free_the_page() is a static function in page_alloc.c, using the new one also allow moving page_frag related code to a new file in the next patch. CC: Alexander Duyck Signed-off-by: Yunsheng Lin --- mm/page_alloc.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 2e22ce5675ca..0511c30bc265 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4781,6 +4781,9 @@ static struct page *__page_frag_cache_refill(struct p= age_frag_cache *nc, gfp_t gfp =3D gfp_mask; =20 #if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* Ensure free_unref_page() can be used to free the page fragment */ + BUILD_BUG_ON(PAGE_FRAG_CACHE_MAX_ORDER > PAGE_ALLOC_COSTLY_ORDER); + gfp_mask =3D (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; page =3D alloc_pages_node(NUMA_NO_NODE, gfp_mask, --=20 2.30.0