From nobody Mon Feb 9 19:42:36 2026 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 D364D2E540C; Fri, 7 Nov 2025 14:51:25 +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=1762527088; cv=none; b=gTRdrCDh1+60nAMRvID0Fl4PRIwTHaBwnFjqHM8eHR0UXav4ZFLopgpxgKoZHqgGDz37RF+Y2zXzhjYKk4zE8++ZsAU078xEy7aK7QY+yV5LVn51SkQYBwFO68fm/fZO3pJ6l0kimAb+g0ZP9hg9s5y/fJDMbsGbUt25SBNaB0c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762527088; c=relaxed/simple; bh=ROr1qnXjcDLzsd8smDrvomvAWYUXWIuKANlwbkhSYDs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=UfIvbOkmU5yQF0Hj0n+Ra2IE7+MOoy5jjVAaxRseLJ93fVkEyrUxkY+LkXXlRJCJYtkkeJW96+tUlwXBa49xcGQ4wu60k2HJVF+KSvVorcopU7xiIqh14amM3JsRFe/3TIESN1s3YNfUgtBBfPCQMSPOKpMYoPwtNqyOuvRb64o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass 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=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTPS id 4d327C44ZJzYQv26; Fri, 7 Nov 2025 22:51:03 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.75]) by mail.maildlp.com (Postfix) with ESMTP id BB54A1A17F1; Fri, 7 Nov 2025 22:51:23 +0800 (CST) Received: from huaweicloud.com (unknown [10.50.87.129]) by APP2 (Coremail) with SMTP id Syh0CgDnPUZoBw5pRwgbDA--.60770S10; Fri, 07 Nov 2025 22:51:23 +0800 (CST) From: libaokun@huaweicloud.com To: linux-ext4@vger.kernel.org Cc: tytso@mit.edu, adilger.kernel@dilger.ca, jack@suse.cz, linux-kernel@vger.kernel.org, kernel@pankajraghav.com, mcgrof@kernel.org, ebiggers@kernel.org, willy@infradead.org, yi.zhang@huawei.com, yangerkun@huawei.com, chengzhihao1@huawei.com, libaokun1@huawei.com, libaokun@huaweicloud.com Subject: [PATCH v2 06/24] ext4: introduce s_min_folio_order for future BS > PS support Date: Fri, 7 Nov 2025 22:42:31 +0800 Message-Id: <20251107144249.435029-7-libaokun@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20251107144249.435029-1-libaokun@huaweicloud.com> References: <20251107144249.435029-1-libaokun@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: Syh0CgDnPUZoBw5pRwgbDA--.60770S10 X-Coremail-Antispam: 1UD129KBjvJXoWxJrWfJFyxtr4xKFyrCw13CFg_yoW8KF13pF nxCFyfGrW8Zry8uFs2gFsrX348Kay8KayUXw4S9w15urWaq3409r1Dt3W5AFWYqrW8XFWS qF1UKry7CrnxC37anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUQI14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F 4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq 3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7 IYx2IY67AKxVWUXVWUAwAv7VC2z280aVAFwI0_Gr1j6F4UJwAm72CE4IkC6x0Yz7v_Jr0_ Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E8c xan2IY04v7M4kE6xkIj40Ew7xC0wCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxG rwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4 vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IY x2IY67AKxVWUCVW8JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Cr0_Gr1UMIIF0xvE42xK8V AvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E 14v26r4UJVWxJrUvcSsGvfC2KfnxnUUI43ZEXa7VUbG-e7UUUUU== X-CM-SenderInfo: 5olet0hnxqqx5xdzvxpfor3voofrz/1tbiAgAFBWkNxrAU1wABsS Content-Type: text/plain; charset="utf-8" From: Baokun Li This commit introduces the s_min_folio_order field to the ext4_sb_info structure. This field will store the minimum folio order required by the current filesystem, laying groundwork for future support of block sizes greater than PAGE_SIZE. Signed-off-by: Baokun Li Reviewed-by: Zhang Yi Reviewed-by: Jan Kara Reviewed-by: Pankaj Raghav --- fs/ext4/ext4.h | 3 +++ fs/ext4/inode.c | 3 ++- fs/ext4/super.c | 10 +++++----- 3 files changed, 10 insertions(+), 6 deletions(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 3d18e6bf43cf..6fe8cc3bf9a5 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1688,6 +1688,9 @@ struct ext4_sb_info { /* record the last minlen when FITRIM is called. */ unsigned long s_last_trim_minblks; =20 + /* minimum folio order of a page cache allocation */ + unsigned int s_min_folio_order; + /* Precomputed FS UUID checksum for seeding other checksums */ __u32 s_csum_seed; =20 diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 6fec3aa2268a..9faa0cf77075 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5181,7 +5181,8 @@ void ext4_set_inode_mapping_order(struct inode *inode) if (!ext4_should_enable_large_folio(inode)) return; =20 - mapping_set_folio_order_range(inode->i_mapping, 0, + mapping_set_folio_order_range(inode->i_mapping, + EXT4_SB(inode->i_sb)->s_min_folio_order, EXT4_MAX_PAGECACHE_ORDER(inode)); } =20 diff --git a/fs/ext4/super.c b/fs/ext4/super.c index a9fa824487f9..a6314a3de51d 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5107,11 +5107,8 @@ static int ext4_load_super(struct super_block *sb, e= xt4_fsblk_t *lsb, * If the default block size is not the same as the real block size, * we need to reload it. */ - if (sb->s_blocksize =3D=3D blocksize) { - *lsb =3D logical_sb_block; - sbi->s_sbh =3D bh; - return 0; - } + if (sb->s_blocksize =3D=3D blocksize) + goto success; =20 /* * bh must be released before kill_bdev(), otherwise @@ -5142,6 +5139,9 @@ static int ext4_load_super(struct super_block *sb, ex= t4_fsblk_t *lsb, ext4_msg(sb, KERN_ERR, "Magic mismatch, very weird!"); goto out; } + +success: + sbi->s_min_folio_order =3D get_order(blocksize); *lsb =3D logical_sb_block; sbi->s_sbh =3D bh; return 0; --=20 2.46.1