From nobody Tue Feb 10 08:27:41 2026 Received: from canpmsgout08.his.huawei.com (canpmsgout08.his.huawei.com [113.46.200.223]) (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 F40EF1FCFFC; Thu, 22 Jan 2026 13:50:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=113.46.200.223 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769089826; cv=none; b=Y9FxGEoA/xndm1f5VN9Qt/qgxqgrPXTkc+vYC0LczIgtfZyWuDAa2z7W9twYieF/v3iui/b7FabNZqS+8I2G1/MfoRQMSuE4ycy3s2B5sRna9+sHWysSOqNUhhyO7kF7AT9mpxojBwiFNCDR9nmESlZCSohkMLA8vf2Ztm64bpE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769089826; c=relaxed/simple; bh=jQL+6RLzsR7px2jEpDMEZv3HOKyEr1oSO9vZY9RkvZQ=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=K8I6lw//WUw8+ZpgHieCz5y9xta1/X5AOmpYhTghHAWH4MIjczc4ElRR9pl7no2nj1J5cZy0KOqmDapuKL9rlwb/6BrwQWUhmrDazcjYQbN7+D48ZVVcPNPhSyL0xmt+BrMm7ruFLU/9jvAUCaLJnVajDqJQ10QutMFatBx7JX4= 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=U3UThz0w; arc=none smtp.client-ip=113.46.200.223 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="U3UThz0w" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=VrO1Gh2lwSX3aEb9VUUJD65yCyKiA7UNP2YVeY/Su74=; b=U3UThz0wysPJ9ZdqJ4aMtzKlpeHrwuhz3ykUZHebb/O8/V5YkPVsZjdQwrRG5axHboapFBqS3 6oMGswSRek3nsXoA4jrzCG8UNr4vRl1ZWYZqHsJ1zleYeoieASKImdVz8s7IgQ0CgFp53tTdtop qe/O1eT0FNMiJajd+ADfsoE= Received: from mail.maildlp.com (unknown [172.19.163.15]) by canpmsgout08.his.huawei.com (SkyGuard) with ESMTPS id 4dxj681fJSzmV69; Thu, 22 Jan 2026 21:46:56 +0800 (CST) Received: from kwepemr500015.china.huawei.com (unknown [7.202.195.162]) by mail.maildlp.com (Postfix) with ESMTPS id 5805140539; Thu, 22 Jan 2026 21:50:21 +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; Thu, 22 Jan 2026 21:50:20 +0800 From: Hongbo Li To: , , CC: , , , , , , Subject: [PATCH v16 10/10] erofs: implement .fadvise for page cache share Date: Thu, 22 Jan 2026 13:37:18 +0000 Message-ID: <20260122133718.658056-11-lihongbo22@huawei.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20260122133718.658056-1-lihongbo22@huawei.com> References: <20260122133718.658056-1-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: kwepems200002.china.huawei.com (7.221.188.68) 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 --- fs/erofs/ishare.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/erofs/ishare.c b/fs/erofs/ishare.c index ad53a57dbcbc..ce980320a8b9 100644 --- a/fs/erofs/ishare.c +++ b/fs/erofs/ishare.c @@ -151,6 +151,12 @@ 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(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, @@ -159,6 +165,7 @@ 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