From patchwork Fri Oct 28 02:16:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dai Ngo X-Patchwork-Id: 13022975 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 723D3FA373D for ; Fri, 28 Oct 2022 02:16:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235701AbiJ1CQg (ORCPT ); Thu, 27 Oct 2022 22:16:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49682 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235747AbiJ1CQe (ORCPT ); Thu, 27 Oct 2022 22:16:34 -0400 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 444CFB8789 for ; Thu, 27 Oct 2022 19:16:34 -0700 (PDT) Received: from pps.filterd (m0246627.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 29S1iIxe029139; Fri, 28 Oct 2022 02:16:30 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id; s=corp-2022-7-12; bh=iT4zucDp57z1i+KVHcDRTQpMS18WCUpEXWL3BFl6z28=; b=H0ZVzH9z6UYHjARTLHPed5f7yBs4aPpFKCCQBYrD48rKft+NZRDYWqa8FA42nCeUdoR7 6ejDDT1WZGvJu9GyBg65Khj32trAoAhFg1yYYqRmSRNbY+JJ+S+y9qdcAholx22xq02A cvxZ9Jko2Q1/EBIj+9HCUfj5u2QCbQrZ0XREThXl+TH+0ehcJ6aFwMQQBr7MhY+xvMDY OYgzlnyUCWk43KlLVcJF4GkVaqMmku/gKpt624OFeHIdUqXS6NKIFI2O0AlQRIggzmYZ x5wJ5ZZrVJYHTd2ytLoqLYDVVKme+WV0mSkCXR8BwxI/53ev35sZN3vM29kdfbIJACqL HA== Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.appoci.oracle.com [130.35.103.27]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3kfays3yha-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 28 Oct 2022 02:16:30 +0000 Received: from pps.filterd (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.5/8.17.1.5) with ESMTP id 29S06lRO012311; Fri, 28 Oct 2022 02:16:29 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3kfagrm5vc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 28 Oct 2022 02:16:28 +0000 Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 29S2GSSG002910; Fri, 28 Oct 2022 02:16:28 GMT Received: from ca-common-hq.us.oracle.com (ca-common-hq.us.oracle.com [10.211.9.209]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 3kfagrm5v3-1; Fri, 28 Oct 2022 02:16:28 +0000 From: Dai Ngo To: chuck.lever@oracle.com, jlayton@kernel.org Cc: linux-nfs@vger.kernel.org Subject: [PATCH v3 0/2] add support for CB_RECALL_ANY and the delegation shrinker Date: Thu, 27 Oct 2022 19:16:07 -0700 Message-Id: <1666923369-21235-1-git-send-email-dai.ngo@oracle.com> X-Mailer: git-send-email 1.8.3.1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-10-27_07,2022-10-27_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 phishscore=0 adultscore=0 malwarescore=0 mlxscore=0 suspectscore=0 bulkscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2210280013 X-Proofpoint-ORIG-GUID: ahGxAkTZep93qkVX2MW6A-6lhAtn5e5E X-Proofpoint-GUID: ahGxAkTZep93qkVX2MW6A-6lhAtn5e5E Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org This patch series adds: . support for sending the CB_RECALL_ANY op. There is only one nfsd4_callback, cl_recall_any, added for each nfs4_client. Access to it must be serialized. For now it's done by the cl_recall_any_busy flag since it's used only by the delegation shrinker. If there is another consumer of cl_recall_any then a spinlock must be used. . the delegation shrinker that sends the advisory CB_RECALL_ANY to the clients to release unused delegations. v2: . modify deleg_reaper to check and send CB_RECALL_ANY to client only once per 5 secs. v3: . modify nfsd4_cb_recall_any_release to use nn->client_lock to protect cl_recall_any_busy and call put_client_renew_locked to decrement cl_rpc_users. --- Dai Ngo (2): NFSD: add support for sending CB_RECALL_ANY NFSD: add delegation shrinker to react to low memory condition fs/nfsd/netns.h | 3 ++ fs/nfsd/nfs4callback.c | 64 ++++++++++++++++++++++++++ fs/nfsd/nfs4state.c | 106 +++++++++++++++++++++++++++++++++++++++++++- fs/nfsd/state.h | 10 +++++ fs/nfsd/xdr4cb.h | 6 +++ 5 files changed, 188 insertions(+), 1 deletion(-)