From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 19387C43219 for ; Mon, 29 Apr 2019 08:34:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DB1DD20578 for ; Mon, 29 Apr 2019 08:34:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727591AbfD2IeB (ORCPT ); Mon, 29 Apr 2019 04:34:01 -0400 Received: from smtp2.provo.novell.com ([137.65.250.81]:51150 "EHLO smtp2.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727480AbfD2IeA (ORCPT ); Mon, 29 Apr 2019 04:34:00 -0400 Received: from ghe-pc.suse.asia (prva10-snat226-1.provo.novell.com [137.65.226.35]) by smtp2.provo.novell.com with ESMTP (TLS encrypted); Mon, 29 Apr 2019 02:33:49 -0600 From: Gang He To: mark@fasheh.com, jlbec@evilplan.org, jiangqi903@gmail.com Cc: Gang He , linux-kernel@vger.kernel.org, ocfs2-devel@oss.oracle.com, akpm@linux-foundation.org Subject: [PATCH V2 2/2] ocfs2: add locking filter debugfs file Date: Mon, 29 Apr 2019 16:33:53 +0800 Message-Id: <20190429083353.1410-1-ghe@suse.com> X-Mailer: git-send-email 2.12.3 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add locking filter debugfs file, which is used to filter lock resources dump from locking_state debugfs file. We use d_filter_secs field to filter lock resources dump, the default d_filter_secs(0) value filters nothing, otherwise, only dump the last N seconds active lock resources. This enhancement can avoid dumping lots of old records. The d_filter_secs value can be changed via locking_filter file. Compared with v1, the main change is to add CONFIG_OCFS2_FS_STATS macro definition judgment. Signed-off-by: Gang He --- fs/ocfs2/dlmglue.c | 38 ++++++++++++++++++++++++++++++++++++++ fs/ocfs2/ocfs2.h | 2 ++ 2 files changed, 40 insertions(+) diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index dccf4136f8c1..554d37d52510 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -3006,6 +3006,8 @@ struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void) kref_init(&dlm_debug->d_refcnt); INIT_LIST_HEAD(&dlm_debug->d_lockres_tracking); dlm_debug->d_locking_state = NULL; + dlm_debug->d_locking_filter = NULL; + dlm_debug->d_filter_secs = 0; out: return dlm_debug; } @@ -3104,11 +3106,33 @@ static int ocfs2_dlm_seq_show(struct seq_file *m, void *v) { int i; char *lvb; + u32 now, last = 0; struct ocfs2_lock_res *lockres = v; + struct ocfs2_dlm_debug *dlm_debug = + ((struct ocfs2_dlm_seq_priv *)m->private)->p_dlm_debug; if (!lockres) return -EINVAL; + if (dlm_debug->d_filter_secs) { + now = ktime_to_timespec(ktime_get()).tv_sec; +#ifdef CONFIG_OCFS2_FS_STATS + if (lockres->l_lock_prmode.ls_last > + lockres->l_lock_exmode.ls_last) + last = lockres->l_lock_prmode.ls_last; + else + last = lockres->l_lock_exmode.ls_last; +#endif + /* + * Use d_filter_secs field to filter lock resources dump, + * the default d_filter_secs(0) value filters nothing, + * otherwise, only dump the last N seconds active lock + * resources. + */ + if ((now - last) > dlm_debug->d_filter_secs) + return 0; + } + seq_printf(m, "0x%x\t", OCFS2_DLM_DEBUG_STR_VERSION); if (lockres->l_type == OCFS2_LOCK_TYPE_DENTRY) @@ -3258,6 +3282,19 @@ static int ocfs2_dlm_init_debug(struct ocfs2_super *osb) goto out; } + dlm_debug->d_locking_filter = debugfs_create_u32("locking_filter", + 0600, + osb->osb_debug_root, + &dlm_debug->d_filter_secs); + if (!dlm_debug->d_locking_filter) { + ret = -EINVAL; + mlog(ML_ERROR, + "Unable to create locking filter debugfs file.\n"); + debugfs_remove(dlm_debug->d_locking_state); + dlm_debug->d_locking_state = NULL; + goto out; + } + ocfs2_get_dlm_debug(dlm_debug); out: return ret; @@ -3269,6 +3306,7 @@ static void ocfs2_dlm_shutdown_debug(struct ocfs2_super *osb) if (dlm_debug) { debugfs_remove(dlm_debug->d_locking_state); + debugfs_remove(dlm_debug->d_locking_filter); ocfs2_put_dlm_debug(dlm_debug); } } diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index 8efa022684f4..f4da51099889 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -237,6 +237,8 @@ struct ocfs2_orphan_scan { struct ocfs2_dlm_debug { struct kref d_refcnt; struct dentry *d_locking_state; + struct dentry *d_locking_filter; + u32 d_filter_secs; struct list_head d_lockres_tracking; }; -- 2.21.0