From nobody Sat Feb 7 06:55:53 2026 Received: from canpmsgout07.his.huawei.com (canpmsgout07.his.huawei.com [113.46.200.222]) (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 55DBA37F0F0; Fri, 23 Jan 2026 01:45:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=113.46.200.222 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769132746; cv=none; b=n6SqSmQqeHmbEkdYQ78kODfKJR008rEMFAPfZBWplNpnKn4dgKgwkNyDdPtMtSkQcv7n1sNh9K30r0tr3rJou3SKGmMFcyCuxxqkI57m/1iZz4FYrg0VG5cMmPpTBXMhdHgPprr2cLe9bxns9I+Quu5mmD9kmTAZhWH56wseJzA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769132746; c=relaxed/simple; bh=q00Zd1QsMQfMJFxzkErcBoqacEhWRBiRzGcZl/vaS0s=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=oDdEHtkK/P7wpSpNGEcqM70DxB4me8JzNL80F1P7Ova4l/bSaHBvVvrVVukfk07QFtccXFCnHHdPM0gWoCxpLhZeruLFFGzcom+y8pEEQgnw++U8YDoW1xcJpvRJ0gRJ9KmhxrjhdJeHStQX+0ABnpwyrMp2TQTOkaCBIuxIVdM= 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=giAWo/rr; arc=none smtp.client-ip=113.46.200.222 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="giAWo/rr" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=bHJ8+pUveP5svlVbwXvXskyfrLfruh6IJ5eNHjeX9MY=; b=giAWo/rrr36d61qXZy7nal68rbmHJdEjeYRngYq28DWnXnVKPxdQs4UH90wHaoH2epVSG/3Fo 3cPnC2zjW8mvicpxt81D327RXehW2Y5xtx0GB6U+baNmL27IDjhpW2xm+/WLe00jHXgdWehx7gt G1ataZt/JO5XeBUfr7+xPxM= Received: from mail.maildlp.com (unknown [172.19.163.200]) by canpmsgout07.his.huawei.com (SkyGuard) with ESMTPS id 4dy0z86vSTzLlTR; Fri, 23 Jan 2026 09:41:56 +0800 (CST) Received: from kwepemr500015.china.huawei.com (unknown [7.202.195.162]) by mail.maildlp.com (Postfix) with ESMTPS id 1A90A4055B; Fri, 23 Jan 2026 09:45:21 +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; Fri, 23 Jan 2026 09:45:20 +0800 From: Hongbo Li To: , , CC: , , , , , , Subject: [PATCH v18 09/10] erofs: support compressed inodes for page cache share Date: Fri, 23 Jan 2026 01:31:31 +0000 Message-ID: <20260123013132.662393-10-lihongbo22@huawei.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20260123013132.662393-1-lihongbo22@huawei.com> References: <20260123013132.662393-1-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 adds page cache sharing functionality for compressed inodes. Signed-off-by: Hongzhen Luo Signed-off-by: Hongbo Li Reviewed-by: Gao Xiang --- fs/erofs/ishare.c | 2 -- fs/erofs/zdata.c | 38 ++++++++++++++++++++++++-------------- 2 files changed, 24 insertions(+), 16 deletions(-) diff --git a/fs/erofs/ishare.c b/fs/erofs/ishare.c index ab459fb62473..ad53a57dbcbc 100644 --- a/fs/erofs/ishare.c +++ b/fs/erofs/ishare.c @@ -44,8 +44,6 @@ bool erofs_ishare_fill_inode(struct inode *inode) struct inode *sharedinode; unsigned long hash; =20 - if (erofs_inode_is_data_compressed(vi->datalayout)) - return false; if (erofs_xattr_fill_inode_fingerprint(&fp, inode, sbi->domain_id)) return false; hash =3D xxh32(fp.opaque, fp.size, 0); diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index 93ab6a481b64..59ee9a36d9eb 100644 --- a/fs/erofs/zdata.c +++ b/fs/erofs/zdata.c @@ -493,7 +493,7 @@ enum z_erofs_pclustermode { }; =20 struct z_erofs_frontend { - struct inode *const inode; + struct inode *inode, *sharedinode; struct erofs_map_blocks map; struct z_erofs_bvec_iter biter; =20 @@ -508,8 +508,8 @@ struct z_erofs_frontend { unsigned int icur; }; =20 -#define Z_EROFS_DEFINE_FRONTEND(fe, i, ho) struct z_erofs_frontend fe =3D = { \ - .inode =3D i, .head =3D Z_EROFS_PCLUSTER_TAIL, \ +#define Z_EROFS_DEFINE_FRONTEND(fe, i, si, ho) struct z_erofs_frontend fe = =3D { \ + .inode =3D i, .sharedinode =3D si, .head =3D Z_EROFS_PCLUSTER_TAIL, \ .mode =3D Z_EROFS_PCLUSTER_FOLLOWED, .headoffset =3D ho } =20 static bool z_erofs_should_alloc_cache(struct z_erofs_frontend *fe) @@ -1866,7 +1866,7 @@ static void z_erofs_pcluster_readmore(struct z_erofs_= frontend *f, pgoff_t index =3D cur >> PAGE_SHIFT; struct folio *folio; =20 - folio =3D erofs_grab_folio_nowait(inode->i_mapping, index); + folio =3D erofs_grab_folio_nowait(f->sharedinode->i_mapping, index); if (!IS_ERR_OR_NULL(folio)) { if (folio_test_uptodate(folio)) folio_unlock(folio); @@ -1883,11 +1883,13 @@ static void z_erofs_pcluster_readmore(struct z_erof= s_frontend *f, =20 static int z_erofs_read_folio(struct file *file, struct folio *folio) { - struct inode *const inode =3D folio->mapping->host; - Z_EROFS_DEFINE_FRONTEND(f, inode, folio_pos(folio)); + struct inode *sharedinode =3D folio->mapping->host; + bool need_iput; + struct inode *realinode =3D erofs_real_inode(sharedinode, &need_iput); + Z_EROFS_DEFINE_FRONTEND(f, realinode, sharedinode, folio_pos(folio)); int err; =20 - trace_erofs_read_folio(inode, folio, false); + trace_erofs_read_folio(realinode, folio, false); z_erofs_pcluster_readmore(&f, NULL, true); err =3D z_erofs_scan_folio(&f, folio, false); z_erofs_pcluster_readmore(&f, NULL, false); @@ -1896,23 +1898,28 @@ static int z_erofs_read_folio(struct file *file, st= ruct folio *folio) /* if some pclusters are ready, need submit them anyway */ err =3D z_erofs_runqueue(&f, 0) ?: err; if (err && err !=3D -EINTR) - erofs_err(inode->i_sb, "read error %d @ %lu of nid %llu", - err, folio->index, EROFS_I(inode)->nid); + erofs_err(realinode->i_sb, "read error %d @ %lu of nid %llu", + err, folio->index, EROFS_I(realinode)->nid); =20 erofs_put_metabuf(&f.map.buf); erofs_release_pages(&f.pagepool); + + if (need_iput) + iput(realinode); return err; } =20 static void z_erofs_readahead(struct readahead_control *rac) { - struct inode *const inode =3D rac->mapping->host; - Z_EROFS_DEFINE_FRONTEND(f, inode, readahead_pos(rac)); + struct inode *sharedinode =3D rac->mapping->host; + bool need_iput; + struct inode *realinode =3D erofs_real_inode(sharedinode, &need_iput); + Z_EROFS_DEFINE_FRONTEND(f, realinode, sharedinode, readahead_pos(rac)); unsigned int nrpages =3D readahead_count(rac); struct folio *head =3D NULL, *folio; int err; =20 - trace_erofs_readahead(inode, readahead_index(rac), nrpages, false); + trace_erofs_readahead(realinode, readahead_index(rac), nrpages, false); z_erofs_pcluster_readmore(&f, rac, true); while ((folio =3D readahead_folio(rac))) { folio->private =3D head; @@ -1926,8 +1933,8 @@ static void z_erofs_readahead(struct readahead_contro= l *rac) =20 err =3D z_erofs_scan_folio(&f, folio, true); if (err && err !=3D -EINTR) - erofs_err(inode->i_sb, "readahead error at folio %lu @ nid %llu", - folio->index, EROFS_I(inode)->nid); + erofs_err(realinode->i_sb, "readahead error at folio %lu @ nid %llu", + folio->index, EROFS_I(realinode)->nid); } z_erofs_pcluster_readmore(&f, rac, false); z_erofs_pcluster_end(&f); @@ -1935,6 +1942,9 @@ static void z_erofs_readahead(struct readahead_contro= l *rac) (void)z_erofs_runqueue(&f, nrpages); erofs_put_metabuf(&f.map.buf); erofs_release_pages(&f.pagepool); + + if (need_iput) + iput(realinode); } =20 const struct address_space_operations z_erofs_aops =3D { --=20 2.22.0