From nobody Tue Feb 10 04:13:06 2026 Received: from canpmsgout06.his.huawei.com (canpmsgout06.his.huawei.com [113.46.200.221]) (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 E7FBE3385A6; Fri, 9 Jan 2026 10:41:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=113.46.200.221 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767955307; cv=none; b=Qq02wWSGQOjMaBMSCsB6sc9nhC6Tig/XRfCtGzHAqPzLiGrqdJTLfpT4Uteouy3Qi4xclERJCD/wAYMIhCGj/7XdYJAuyerjyJ8HFi1S6g8lQfzt6DVVInretmLQhJGnRSRvcv4MdyVvfH5/3uJQzswZLPAYoiPEVAMNTCS6Uxw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767955307; c=relaxed/simple; bh=PYdNHSrXX5eN6ykaQblXrdXLRMXgyv5AEtSAZ3iXG4s=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=GIpC+4IIyYMNKpOKe9uqcJM2PpiWAaqqKlIeoOhHyr/M7h8c8sN+b8CXE4ZxBjPGNyY6EpVHwa+ABPZITqLCBmTBSuV29j6512m04Tmecq5DfFLcBgu2basHJqChZ+ubOc7FjhKnsXDqlSzQeVPNwGas8Ebj/3fptaugAam7KE8= 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=XTt90r0W; arc=none smtp.client-ip=113.46.200.221 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="XTt90r0W" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=Prkh09N5bY6Pyt+qiNdP7r6JDJbv/0vdTFS2y1gv9ss=; b=XTt90r0WLlDDbIGT19XniWLvF12SMqSxjxjUBxv58gwmoIMdR+3gNTPZQ+93jx2QFTQ5oRyWk aftb3rp0pqhqRiD2A7nsHd9FUSJIaA5nCqDBXqXLI4Rox+KyHeKRiJPqrZ70Kx+mMtZYwDiKqYF TlyOBfPmVKtSTql0j67mUAI= Received: from mail.maildlp.com (unknown [172.19.163.104]) by canpmsgout06.his.huawei.com (SkyGuard) with ESMTPS id 4dndXg3Dx6zRhQg; Fri, 9 Jan 2026 18:38:27 +0800 (CST) Received: from kwepemr500015.china.huawei.com (unknown [7.202.195.162]) by mail.maildlp.com (Postfix) with ESMTPS id 59BC04056A; Fri, 9 Jan 2026 18:41:44 +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; Fri, 9 Jan 2026 18:41:43 +0800 From: Hongbo Li To: , , CC: , , , , , , Subject: [PATCH v14 10/10] erofs: implement .fadvise for page cache share Date: Fri, 9 Jan 2026 10:28:56 +0000 Message-ID: <20260109102856.598531-11-lihongbo22@huawei.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20260109102856.598531-1-lihongbo22@huawei.com> References: <20260109102856.598531-1-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: kwepems200001.china.huawei.com (7.221.188.67) 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 366f0d79e008..2258682b76cf 100644 --- a/fs/erofs/ishare.c +++ b/fs/erofs/ishare.c @@ -149,6 +149,13 @@ 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, @@ -157,6 +164,7 @@ 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