From nobody Thu Sep 11 22:30:19 2025 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 8EEBCCA0EC8 for ; Mon, 11 Sep 2023 22:24:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239706AbjIKWWL (ORCPT ); Mon, 11 Sep 2023 18:22:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59024 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235991AbjIKJsG (ORCPT ); Mon, 11 Sep 2023 05:48:06 -0400 Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B852E44 for ; Mon, 11 Sep 2023 02:47:39 -0700 (PDT) Received: by mail-pf1-x42b.google.com with SMTP id d2e1a72fcca58-68fc94307bfso148376b3a.0 for ; Mon, 11 Sep 2023 02:47:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1694425659; x=1695030459; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=G6aywPS6iXJW+BDe3k7kKZT5Ft1k56ZyEV+KzSPLpG4=; b=Q+lZdtUKmQ08ugN/OYmIRlBo9N1kKrm+2toXo3VRPQeua1TkZ6xpimmzIgPruFsjfX hIWkOtjd6xuoABb/Y3eBPLudCOx/kGZvdoDJrAso+x4WedzWvVWCZt9L8nJWS1YcbmUW 96MMHI7SrgNmDrEEN49csZ58OeZr13GvZK0kCcbrqOY/ixzqaJqFdtwDtR3/FdqMd6zp ik92Jn1a+ZO9bXAyxV4FgbYrA35/qEkrfHpOuKvHIzYy1NnxornhJHLF8u0QUptfsaZl xfez6ws9EEc2cXJ0xPAj2cCLn1O7fafX6Gytnh+43lQ4uggOyWSQSaXCQj0xYu8zrQfg IlQQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1694425659; x=1695030459; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=G6aywPS6iXJW+BDe3k7kKZT5Ft1k56ZyEV+KzSPLpG4=; b=Ed9ah5mACS062cHOlulVE4qgK4r/hpU4BPIu2eyotUemtDEnxe16oZZzElCgcvuQSl stVIf/0QSAb7CyvJ3ZNO9CTYmAs2tg2cXcl8Lr/+bH5syN6FVArwGof90V6i8mkKJeJ2 yUW33VkrxYh/96qaFup51TH5q2tXaWJG/8g3htYLXBcqBO0/iIcaq2DSR7sGJvOOayvs hCdN7zMQCjoxNyrc57B+WBmjte4Jyxpp3Xi5ULQS84RB57AqX3k2HzfoGA9UIzTPQXYn I8hEoJG/gRTchn8c1yssLtdV0ACA13fDvbVxPwpSpFUF+ZNJ5OGdhRcmt5nSEPHOxD0l WEDg== X-Gm-Message-State: AOJu0YwNf1Ph8eZY6DZQR35bqhlQJ0N7yK3dNs49+8WxvY+NaMBWz+WT 9Qo1deGb7mspnGzSYXZILxoDHw== X-Google-Smtp-Source: AGHT+IH2KVNM9Hi/PmmKcKS4mr3sE9GLoL02lCaa5Z7/hioPtgcvnrY94ZAiH3SYey8unqQ3Icvz8g== X-Received: by 2002:a05:6a20:4401:b0:140:ca4c:740d with SMTP id ce1-20020a056a20440100b00140ca4c740dmr14470391pzb.4.1694425659098; Mon, 11 Sep 2023 02:47:39 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id az7-20020a170902a58700b001bdc2fdcf7esm5988188plb.129.2023.09.11.02.47.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Sep 2023 02:47:38 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Qi Zheng Subject: [PATCH v6 17/45] mm: thp: dynamically allocate the thp-related shrinkers Date: Mon, 11 Sep 2023 17:44:16 +0800 Message-Id: <20230911094444.68966-18-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230911094444.68966-1-zhengqi.arch@bytedance.com> References: <20230911094444.68966-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Use new APIs to dynamically allocate the thp-zero and thp-deferred_split shrinkers. Signed-off-by: Qi Zheng --- mm/huge_memory.c | 67 +++++++++++++++++++++++++++++++----------------- 1 file changed, 43 insertions(+), 24 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 064fbd90822b..1cfd83e91748 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -65,7 +65,11 @@ unsigned long transparent_hugepage_flags __read_mostly = =3D (1<count_objects =3D shrink_huge_zero_page_count; + huge_zero_page_shrinker->scan_objects =3D shrink_huge_zero_page_scan; + shrinker_register(huge_zero_page_shrinker); + + deferred_split_shrinker->count_objects =3D deferred_split_count; + deferred_split_shrinker->scan_objects =3D deferred_split_scan; + shrinker_register(deferred_split_shrinker); + + return 0; +} + +static void __init thp_shrinker_exit(void) +{ + shrinker_free(huge_zero_page_shrinker); + shrinker_free(deferred_split_shrinker); +} + static int __init hugepage_init(void) { int err; @@ -482,12 +514,9 @@ static int __init hugepage_init(void) if (err) goto err_slab; =20 - err =3D register_shrinker(&huge_zero_page_shrinker, "thp-zero"); - if (err) - goto err_hzp_shrinker; - err =3D register_shrinker(&deferred_split_shrinker, "thp-deferred_split"); + err =3D thp_shrinker_init(); if (err) - goto err_split_shrinker; + goto err_shrinker; =20 /* * By default disable transparent hugepages on smaller systems, @@ -505,10 +534,8 @@ static int __init hugepage_init(void) =20 return 0; err_khugepaged: - unregister_shrinker(&deferred_split_shrinker); -err_split_shrinker: - unregister_shrinker(&huge_zero_page_shrinker); -err_hzp_shrinker: + thp_shrinker_exit(); +err_shrinker: khugepaged_destroy(); err_slab: hugepage_exit_sysfs(hugepage_kobj); @@ -2828,7 +2855,7 @@ void deferred_split_folio(struct folio *folio) #ifdef CONFIG_MEMCG if (memcg) set_shrinker_bit(memcg, folio_nid(folio), - deferred_split_shrinker.id); + deferred_split_shrinker->id); #endif } spin_unlock_irqrestore(&ds_queue->split_queue_lock, flags); @@ -2902,14 +2929,6 @@ static unsigned long deferred_split_scan(struct shri= nker *shrink, return split; } =20 -static struct shrinker deferred_split_shrinker =3D { - .count_objects =3D deferred_split_count, - .scan_objects =3D deferred_split_scan, - .seeks =3D DEFAULT_SEEKS, - .flags =3D SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE | - SHRINKER_NONSLAB, -}; - #ifdef CONFIG_DEBUG_FS static void split_huge_pages_all(void) { --=20 2.30.2