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ocfs2/dlm: Track number of mles

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The lifetime of a mle is limited to the duration of the lockres mastery
process. While typically this lifetime is fairly short, we have noticed
the number of mles explode under certain circumstances. This patch tracks
the number of each different types of mles and should help us determine
how best to speed up the mastery process.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
Sunil Mushran 2009-02-26 15:00:43 -08:00 committed by Mark Fasheh
parent 67ae1f0604
commit 2041d8fdce
3 changed files with 14 additions and 1 deletions
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5
fs/ocfs2/dlm/dlmcommon.h
View File

@ -52,7 +52,8 @@
enum dlm_mle_type {
DLM_MLE_BLOCK,
DLM_MLE_MASTER,
DLM_MLE_MIGRATION
DLM_MLE_MIGRATION,
DLM_MLE_NUM_TYPES
};
struct dlm_lock_name {
@ -156,6 +157,8 @@ struct dlm_ctxt
struct list_head mle_hb_events;
/* these give a really vague idea of the system load */
atomic_t mle_tot_count[DLM_MLE_NUM_TYPES];
atomic_t mle_cur_count[DLM_MLE_NUM_TYPES];
atomic_t local_resources;
atomic_t remote_resources;
atomic_t unknown_resources;

5
fs/ocfs2/dlm/dlmdomain.c
View File

@ -1608,6 +1608,11 @@ static struct dlm_ctxt *dlm_alloc_ctxt(const char *domain,
atomic_set(&dlm->remote_resources, 0);
atomic_set(&dlm->unknown_resources, 0);
for (i = 0; i < DLM_MLE_NUM_TYPES; ++i) {
atomic_set(&dlm->mle_tot_count[i], 0);
atomic_set(&dlm->mle_cur_count[i], 0);
}
spin_lock_init(&dlm->work_lock);
INIT_LIST_HEAD(&dlm->work_list);
INIT_WORK(&dlm->dispatched_work, dlm_dispatch_work);

5
fs/ocfs2/dlm/dlmmaster.c
View File

@ -325,6 +325,9 @@ static void dlm_init_mle(struct dlm_master_list_entry *mle,
mle->u.mlename.hash = dlm_lockid_hash(name, namelen);
}
atomic_inc(&dlm->mle_tot_count[mle->type]);
atomic_inc(&dlm->mle_cur_count[mle->type]);
/* copy off the node_map and register hb callbacks on our copy */
memcpy(mle->node_map, dlm->domain_map, sizeof(mle->node_map));
memcpy(mle->vote_map, dlm->domain_map, sizeof(mle->vote_map));
@ -467,6 +470,8 @@ static void dlm_mle_release(struct kref *kref)
/* detach the mle from the domain node up/down events */
__dlm_mle_detach_hb_events(dlm, mle);
atomic_dec(&dlm->mle_cur_count[mle->type]);
/* NOTE: kfree under spinlock here.
* if this is bad, we can move this to a freelist. */
kmem_cache_free(dlm_mle_cache, mle);