Messages in this thread Patch in this message | | | From | Gang He <> | Subject | [PATCH 2/2] ocfs2: add locking filter debugfs file | Date | Mon, 29 Apr 2019 14:46:13 +0800 |
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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.
Signed-off-by: Gang He <ghe@suse.com> --- fs/ocfs2/dlmglue.c | 33 +++++++++++++++++++++++++++++++++ fs/ocfs2/ocfs2.h | 2 ++ 2 files changed, 35 insertions(+)
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index dccf4136f8c1..2f36fe40295c 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 +3106,28 @@ static int ocfs2_dlm_seq_show(struct seq_file *m, void *v) { int i; char *lvb; + u32 now, last; 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; + now = ktime_to_timespec(ktime_get()).tv_sec; + 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; + + /* + * 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 (dlm_debug->d_filter_secs && (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 +3277,19 @@ 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 +3301,7 @@ 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
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