From nobody Mon Nov 25 23:40:13 2024 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (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 F0CA21EF0A0; Thu, 24 Oct 2024 13:23:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729776191; cv=none; b=jrHkFoOtRAJ6byEbq+TskrZSiNCqs1NNTM7EUyJ6jMf6+GPulSYhbS9qj8UWp3E31Cj/f6fG0uT2VU5s6hB5Y+oZYPYtgi/FP+MApvScYUrzEoGZakJARi6DvtBoJ+ATx4RLoNuutRhHAnRuaAKlATo60SfHEv95PZS1hAwkjxU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729776191; c=relaxed/simple; bh=pOQ2k6NjMYL017UCgapeNP8FlbOOpZ9dBLuCfkvzVZQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=g1ebwda0eWx3AWyIvV2dbhpcx7oEXbZonWcK+EqLJTi0hfIlNYQX7rg1jTbCWq3pjxxJu07ja9j3tt6mu5DriivqeC9e6dwVnAA+fpXjNFK4WfKTP5AP0IgRP61hS+FmqyJaHKtO0eYTyNt4LIv3UzgCs1lLuNoFActY+/G7Dg8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=none smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4XZ66H4zBjz4f3nV0; Thu, 24 Oct 2024 21:22:47 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id F0A0B1A0196; Thu, 24 Oct 2024 21:23:05 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP4 (Coremail) with SMTP id gCh0CgCHusYpShpn7tb6Ew--.444S14; Thu, 24 Oct 2024 21:23:05 +0800 (CST) From: Yu Kuai To: stable@vger.kernel.org, gregkh@linuxfoundation.org, harry.wentland@amd.com, sunpeng.li@amd.com, Rodrigo.Siqueira@amd.com, alexander.deucher@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch, viro@zeniv.linux.org.uk, brauner@kernel.org, Liam.Howlett@oracle.com, akpm@linux-foundation.org, hughd@google.com, willy@infradead.org, sashal@kernel.org, srinivasan.shanmugam@amd.com, chiahsuan.chung@amd.com, mingo@kernel.org, mgorman@techsingularity.net, yukuai3@huawei.com, chengming.zhou@linux.dev, zhangpeng.00@bytedance.com, chuck.lever@oracle.com Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, maple-tree@lists.infradead.org, linux-mm@kvack.org, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com Subject: [PATCH 6.6 10/28] maple_tree: use cached node end in mas_next() Date: Thu, 24 Oct 2024 21:19:51 +0800 Message-Id: <20241024132009.2267260-11-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20241024132009.2267260-1-yukuai1@huaweicloud.com> References: <20241024132009.2267260-1-yukuai1@huaweicloud.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-CM-TRANSID: gCh0CgCHusYpShpn7tb6Ew--.444S14 X-Coremail-Antispam: 1UD129KBjvJXoWxGrWUuw4rXF43Cr4rCFy7GFg_yoW5WF4Upa 4DWa45K39FyF18Krnavr45Zr9Fgr1ak3yUta47Gw15XFyDtr1fXF1DAa48uFs093s2vF13 Aw45C3WUCws7GaDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUmS14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr1j6r xdM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0D M2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjx v20xvE14v26r106r15McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1l F7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E8cxan2 IY04v7MxkF7I0En4kS14v26rWY6Fy7MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY 6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17 CEb7AF67AKxVWrXVW8Jr1lIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVW8JVW5JwCI 42IY6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF 4lIxAIcVC2z280aVAFwI0_Gr0_Cr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBI daVFxhVjvjDU0xZFpf9x0pR4E__UUUUU= X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ Content-Type: text/plain; charset="utf-8" From: "Liam R. Howlett" commit e9c52d8940cbfd94b36035bbebce7f55954e7728 upstream. When looking for the next entry, don't recalculate the node end as it is now tracked in the maple state. Link: https://lkml.kernel.org/r/20231101171629.3612299-6-Liam.Howlett@oracl= e.com Signed-off-by: Liam R. Howlett Cc: Peng Zhang Signed-off-by: Andrew Morton Signed-off-by: Yu Kuai --- lib/maple_tree.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/lib/maple_tree.c b/lib/maple_tree.c index d19fb14a9635..e0dcc8412da0 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -4539,6 +4539,7 @@ static inline int mas_next_node(struct ma_state *mas,= struct maple_node *node, unsigned long min; unsigned long *pivots; struct maple_enode *enode; + struct maple_node *tmp; int level =3D 0; unsigned char node_end; enum maple_type mt; @@ -4591,6 +4592,10 @@ static inline int mas_next_node(struct ma_state *mas= , struct maple_node *node, pivots =3D ma_pivots(node, mt); =20 mas->max =3D mas_safe_pivot(mas, pivots, mas->offset, mt); + tmp =3D mte_to_node(enode); + mt =3D mte_node_type(enode); + pivots =3D ma_pivots(tmp, mt); + mas->end =3D ma_data_end(tmp, mt, pivots, mas->max); if (unlikely(ma_dead_node(node))) return 1; =20 @@ -4625,7 +4630,6 @@ static void *mas_next_slot(struct ma_state *mas, unsi= gned long max, bool empty, unsigned long pivot; enum maple_type type; struct maple_node *node; - unsigned char data_end; unsigned long save_point =3D mas->last; void *entry; =20 @@ -4633,12 +4637,11 @@ static void *mas_next_slot(struct ma_state *mas, un= signed long max, bool empty, node =3D mas_mn(mas); type =3D mte_node_type(mas->node); pivots =3D ma_pivots(node, type); - data_end =3D ma_data_end(node, type, pivots, mas->max); if (unlikely(mas_rewalk_if_dead(mas, node, save_point))) goto retry; =20 if (mas->max >=3D max) { - if (likely(mas->offset < data_end)) + if (likely(mas->offset < mas->end)) pivot =3D pivots[mas->offset]; else goto overflow; @@ -4650,11 +4653,11 @@ static void *mas_next_slot(struct ma_state *mas, un= signed long max, bool empty, goto overflow; } =20 - if (likely(mas->offset < data_end)) { + if (likely(mas->offset < mas->end)) { mas->index =3D pivots[mas->offset] + 1; again: mas->offset++; - if (likely(mas->offset < data_end)) + if (likely(mas->offset < mas->end)) mas->last =3D pivots[mas->offset]; else mas->last =3D mas->max; @@ -4691,7 +4694,6 @@ static void *mas_next_slot(struct ma_state *mas, unsi= gned long max, bool empty, goto overflow; =20 mas->index =3D mas->last + 1; - /* Node cannot end on NULL, so it's safe to short-cut here */ goto again; } =20 --=20 2.39.2