From nobody Tue Feb 10 12:57:15 2026 Received: from canpmsgout03.his.huawei.com (canpmsgout03.his.huawei.com [113.46.200.218]) (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 05FEB32A3FB; Wed, 24 Dec 2025 04:22:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=113.46.200.218 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766550156; cv=none; b=k28f+o+OhvthNhuOB/BIVy2rZi7io3PJuU8e8MeUyshsB/GvHzJg+zjtMxFBj8rPJJnqlPSD57srcxmp2thnO4Po4dEhw10Fi0bd/7lrpAd8Chk2eHmXTO9ZPqV8BhZhp165ubbl364pZxzCo+JJXtS21rtVG9F8dkF3I+WWaeE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766550156; c=relaxed/simple; bh=iPKQ6BvltJ9yUPV1KL6zCqYfmTGb1A7Frg8pDvZTZ68=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=SelXtJ6eYOifG1AJpn1K7oCAe0DhFGwYdJAZYP0ea/cJ9kgDO4G/GWe9hp4P/7Bkdc4rllIlLcFw5Ixpv8Y34bGNZRAlMNinIkyhA5IjampfNiZQ0FGVIdJpJ9mxwW/R2krZ8XIX4MP+ynr8WDFFCs7Gft/mB5Pw1sedH1THAT0= 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=xattSqXR; arc=none smtp.client-ip=113.46.200.218 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="xattSqXR" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=dTQBklqP38GVCIoyDRY/ye9fFsGS5lZwx8F3niDAAyI=; b=xattSqXRHfe9h61fZvROfvHNYTlSXCB8cd42yDMmOaMdtw0UFPSur1cs+5CCmsVDerY1v7qlS 0W409kpnSiGYxLLJIfLsYUDs0ptl+49kDeZNiuPCp74qp+b+EkJylsDwY6O5N+tFI9IdmYjka/a 2OuupVHz3vjymm4szW3uRVU= Received: from mail.maildlp.com (unknown [172.19.162.144]) by canpmsgout03.his.huawei.com (SkyGuard) with ESMTPS id 4dbdtv5lcGzpT06; Wed, 24 Dec 2025 12:19:35 +0800 (CST) Received: from kwepemr500015.china.huawei.com (unknown [7.202.195.162]) by mail.maildlp.com (Postfix) with ESMTPS id E7AAA40538; Wed, 24 Dec 2025 12:22:31 +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, 24 Dec 2025 12:22:31 +0800 From: Hongbo Li To: , , , , , CC: , , , Subject: [PATCH v11 09/10] erofs: support compressed inodes for page cache share Date: Wed, 24 Dec 2025 04:09:31 +0000 Message-ID: <20251224040932.496478-10-lihongbo22@huawei.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20251224040932.496478-1-lihongbo22@huawei.com> References: <20251224040932.496478-1-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 --- fs/erofs/zdata.c | 30 ++++++++++++++++++++++-------- 1 file changed, 22 insertions(+), 8 deletions(-) diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index 65da21504632..759f3fe225c9 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; struct erofs_map_blocks map; struct z_erofs_bvec_iter biter; =20 @@ -1884,9 +1884,13 @@ static void z_erofs_pcluster_readmore(struct z_erofs= _frontend *f, 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)); + bool need_iput =3D false; + struct inode *realinode =3D erofs_real_inode(inode, &need_iput); + Z_EROFS_DEFINE_FRONTEND(f, NULL, folio_pos(folio)); int err; =20 + DBG_BUGON(!realinode); + f.inode =3D realinode; trace_erofs_read_folio(folio, false); z_erofs_pcluster_readmore(&f, NULL, true); err =3D z_erofs_scan_folio(&f, folio, false); @@ -1896,23 +1900,30 @@ 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)); + bool need_iput; + struct inode *realinode =3D erofs_real_inode(inode, &need_iput); + Z_EROFS_DEFINE_FRONTEND(f, NULL, 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); + DBG_BUGON(!realinode); + f.inode =3D realinode; + 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 +1937,8 @@ 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 +1946,9 @@ 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