static DEFINE_PER_CPU(unsigned long, nfsd_file_evictions);
struct nfsd_fcache_disposal {
- struct work_struct work;
spinlock_t lock;
struct list_head freeme;
};
-static struct workqueue_struct *nfsd_filecache_wq __read_mostly;
-
static struct kmem_cache *nfsd_file_slab;
static struct kmem_cache *nfsd_file_mark_slab;
static struct list_lru nfsd_file_lru;
spin_lock(&l->lock);
list_move_tail(&nf->nf_lru, &l->freeme);
spin_unlock(&l->lock);
- queue_work(nfsd_filecache_wq, &l->work);
+ svc_wake_up(nn->nfsd_serv);
+ }
+}
+
+/**
+ * nfsd_file_net_dispose - deal with nfsd_files waiting to be disposed.
+ * @nn: nfsd_net in which to find files to be disposed.
+ *
+ * When files held open for nfsv3 are removed from the filecache, whether
+ * due to memory pressure or garbage collection, they are queued to
+ * a per-net-ns queue. This function completes the disposal, either
+ * directly or by waking another nfsd thread to help with the work.
+ */
+void nfsd_file_net_dispose(struct nfsd_net *nn)
+{
+ struct nfsd_fcache_disposal *l = nn->fcache_disposal;
+
+ if (!list_empty(&l->freeme)) {
+ LIST_HEAD(dispose);
+ int i;
+
+ spin_lock(&l->lock);
+ for (i = 0; i < 8 && !list_empty(&l->freeme); i++)
+ list_move(l->freeme.next, &dispose);
+ spin_unlock(&l->lock);
+ if (!list_empty(&l->freeme))
+ /* Wake up another thread to share the work
+ * *before* doing any actual disposing.
+ */
+ svc_wake_up(nn->nfsd_serv);
+ nfsd_file_dispose_list(&dispose);
}
}
flush_delayed_fput();
}
-/**
- * nfsd_file_delayed_close - close unused nfsd_files
- * @work: dummy
- *
- * Scrape the freeme list for this nfsd_net, and then dispose of them
- * all.
- */
-static void
-nfsd_file_delayed_close(struct work_struct *work)
-{
- LIST_HEAD(head);
- struct nfsd_fcache_disposal *l = container_of(work,
- struct nfsd_fcache_disposal, work);
-
- spin_lock(&l->lock);
- list_splice_init(&l->freeme, &head);
- spin_unlock(&l->lock);
-
- nfsd_file_dispose_list(&head);
-}
-
static int
nfsd_file_lease_notifier_call(struct notifier_block *nb, unsigned long arg,
void *data)
return ret;
ret = -ENOMEM;
- nfsd_filecache_wq = alloc_workqueue("nfsd_filecache", WQ_UNBOUND, 0);
- if (!nfsd_filecache_wq)
- goto out;
-
nfsd_file_slab = kmem_cache_create("nfsd_file",
sizeof(struct nfsd_file), 0, 0, NULL);
if (!nfsd_file_slab) {
goto out_err;
}
-
ret = list_lru_init(&nfsd_file_lru);
if (ret) {
pr_err("nfsd: failed to init nfsd_file_lru: %d\n", ret);
nfsd_file_slab = NULL;
kmem_cache_destroy(nfsd_file_mark_slab);
nfsd_file_mark_slab = NULL;
- destroy_workqueue(nfsd_filecache_wq);
- nfsd_filecache_wq = NULL;
rhltable_destroy(&nfsd_file_rhltable);
goto out;
}
l = kmalloc(sizeof(*l), GFP_KERNEL);
if (!l)
return NULL;
- INIT_WORK(&l->work, nfsd_file_delayed_close);
spin_lock_init(&l->lock);
INIT_LIST_HEAD(&l->freeme);
return l;
static void
nfsd_free_fcache_disposal(struct nfsd_fcache_disposal *l)
{
- cancel_work_sync(&l->work);
nfsd_file_dispose_list(&l->freeme);
kfree(l);
}
fsnotify_wait_marks_destroyed();
kmem_cache_destroy(nfsd_file_mark_slab);
nfsd_file_mark_slab = NULL;
- destroy_workqueue(nfsd_filecache_wq);
- nfsd_filecache_wq = NULL;
rhltable_destroy(&nfsd_file_rhltable);
for_each_possible_cpu(i) {