From nobody Mon Feb 9 01:35:09 2026 Received: from canpmsgout05.his.huawei.com (canpmsgout05.his.huawei.com [113.46.200.220]) (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 D04303191BA; Wed, 31 Dec 2025 09:14:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=113.46.200.220 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767172449; cv=none; b=Fmjw81AJjhc3s4CKvDjma5APdEfR77B0drQOSNExLCOD2+BfuC9v/zUNy1TypOxLcpMeUrEhlZfW9K3E1QogNwzmBuv5I4Z9uwUvfr95BMCXuL9iI0oP+mHzMBE60COIl0oYEPISO3yORKJRDBmZAyJF2kbCSg5mSy0HNjzCo/E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767172449; c=relaxed/simple; bh=Z1+mrHcVx+KTT4EB306qKfgW24bF1dSwWLrK3KG7ALQ=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=PWdAAONRQ1IPuAqK7ZHSHMU0ykyV5xH/JBf6aFw2DPnc+cefmEYr75IZR9/r07pY1aL7OEyEKn80VEXh4Egp3Sck05RKa9PiyNPdaDV9N6hXYZI4csvkHP+tBQ5fKZaQb566zRgxVw53n0f1XpkxFMHhQ6QGg9ePcCFq0BpJQuI= 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; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b=Lr6wWqp9; arc=none smtp.client-ip=113.46.200.220 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 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b="Lr6wWqp9" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=NTdhokYX3kI07kKshOUNPjp2sz5Cl0rGRESoWXdC/s8=; b=Lr6wWqp9bpNPnS+wDXjw2P7VdC7omvQxMxE0x7eBdXMprgWXOFhzZLXykT28pHIIv/3WwPjbI N3WGGdkh+znXVXgDYMgYGBR0JnfzjpNsbmgLLRJbKRaBJDGyDfBJYBxBYm+UkCXPLW7P0IXC1z7 D2hptI7JmQbi3TlXW1KZkQ4= Received: from mail.maildlp.com (unknown [172.19.163.104]) by canpmsgout05.his.huawei.com (SkyGuard) with ESMTPS id 4dh41p4l7Cz12LDq; Wed, 31 Dec 2025 17:10:54 +0800 (CST) Received: from kwepemr500015.china.huawei.com (unknown [7.202.195.162]) by mail.maildlp.com (Postfix) with ESMTPS id 004684056A; Wed, 31 Dec 2025 17:14:03 +0800 (CST) Received: from huawei.com (10.67.174.162) by kwepemr500015.china.huawei.com (7.202.195.162) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Wed, 31 Dec 2025 17:14:02 +0800 From: Hongbo Li To: , , CC: , , , , , , Subject: [PATCH v12 10/10] erofs: implement .fadvise for page cache share Date: Wed, 31 Dec 2025 09:01:18 +0000 Message-ID: <20251231090118.541061-11-lihongbo22@huawei.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20251231090118.541061-1-lihongbo22@huawei.com> References: <20251231090118.541061-1-lihongbo22@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: kwepems500002.china.huawei.com (7.221.188.17) To kwepemr500015.china.huawei.com (7.202.195.162) Content-Type: text/plain; charset="utf-8" From: Hongzhen Luo This patch implements the .fadvise interface for page cache share. Similar to overlayfs, it drops those clean, unused pages through vfs_fadvise(). Signed-off-by: Hongzhen Luo Signed-off-by: Hongbo Li Reviewed-by: Gao Xiang --- fs/erofs/ishare.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/erofs/ishare.c b/fs/erofs/ishare.c index b91f0ce412c0..2b7660d7e9d4 100644 --- a/fs/erofs/ishare.c +++ b/fs/erofs/ishare.c @@ -152,6 +152,13 @@ static int erofs_ishare_mmap(struct file *file, struct= vm_area_struct *vma) return generic_file_readonly_mmap(file, vma); } =20 +static int erofs_ishare_fadvise(struct file *file, loff_t offset, + loff_t len, int advice) +{ + return vfs_fadvise((struct file *)file->private_data, + offset, len, advice); +} + const struct file_operations erofs_ishare_fops =3D { .open =3D erofs_ishare_file_open, .llseek =3D generic_file_llseek, @@ -160,6 +167,7 @@ const struct file_operations erofs_ishare_fops =3D { .release =3D erofs_ishare_file_release, .get_unmapped_area =3D thp_get_unmapped_area, .splice_read =3D filemap_splice_read, + .fadvise =3D erofs_ishare_fadvise, }; =20 struct inode *erofs_real_inode(struct inode *inode, bool *need_iput) --=20 2.22.0