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fs: nfsd: use group allocation/free of per-cpu counters API
Use group allocation/free of per-cpu counters api to accelerate nfsd percpu_counters init/destroy(), and also squash the nfsd_percpu_counters_init/reset/destroy() and nfsd_counters_init/destroy() into callers to simplify code. Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
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@ -334,21 +334,25 @@ static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc)
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static int export_stats_init(struct export_stats *stats)
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{
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stats->start_time = ktime_get_seconds();
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return nfsd_percpu_counters_init(stats->counter, EXP_STATS_COUNTERS_NUM);
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return percpu_counter_init_many(stats->counter, 0, GFP_KERNEL,
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EXP_STATS_COUNTERS_NUM);
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}
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static void export_stats_reset(struct export_stats *stats)
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{
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if (stats)
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nfsd_percpu_counters_reset(stats->counter,
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EXP_STATS_COUNTERS_NUM);
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if (stats) {
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int i;
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for (i = 0; i < EXP_STATS_COUNTERS_NUM; i++)
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percpu_counter_set(&stats->counter[i], 0);
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}
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}
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static void export_stats_destroy(struct export_stats *stats)
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{
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if (stats)
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nfsd_percpu_counters_destroy(stats->counter,
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EXP_STATS_COUNTERS_NUM);
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percpu_counter_destroy_many(stats->counter,
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EXP_STATS_COUNTERS_NUM);
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}
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static void svc_export_put(struct kref *ref)
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@ -1672,7 +1672,8 @@ static __net_init int nfsd_net_init(struct net *net)
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retval = nfsd_idmap_init(net);
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if (retval)
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goto out_idmap_error;
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retval = nfsd_stat_counters_init(nn);
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retval = percpu_counter_init_many(nn->counter, 0, GFP_KERNEL,
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NFSD_STATS_COUNTERS_NUM);
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if (retval)
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goto out_repcache_error;
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memset(&nn->nfsd_svcstats, 0, sizeof(nn->nfsd_svcstats));
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@ -1704,7 +1705,7 @@ static __net_exit void nfsd_net_exit(struct net *net)
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struct nfsd_net *nn = net_generic(net, nfsd_net_id);
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nfsd_proc_stat_shutdown(net);
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nfsd_stat_counters_destroy(nn);
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percpu_counter_destroy_many(nn->counter, NFSD_STATS_COUNTERS_NUM);
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nfsd_idmap_shutdown(net);
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nfsd_export_shutdown(net);
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nfsd_netns_free_versions(nn);
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@ -73,48 +73,6 @@ static int nfsd_show(struct seq_file *seq, void *v)
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DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
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int nfsd_percpu_counters_init(struct percpu_counter *counters, int num)
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{
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int i, err = 0;
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for (i = 0; !err && i < num; i++)
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err = percpu_counter_init(&counters[i], 0, GFP_KERNEL);
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if (!err)
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return 0;
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for (; i > 0; i--)
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percpu_counter_destroy(&counters[i-1]);
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return err;
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}
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void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num)
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{
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int i;
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for (i = 0; i < num; i++)
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percpu_counter_set(&counters[i], 0);
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}
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void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num)
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{
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int i;
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for (i = 0; i < num; i++)
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percpu_counter_destroy(&counters[i]);
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}
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int nfsd_stat_counters_init(struct nfsd_net *nn)
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{
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return nfsd_percpu_counters_init(nn->counter, NFSD_STATS_COUNTERS_NUM);
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}
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void nfsd_stat_counters_destroy(struct nfsd_net *nn)
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{
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nfsd_percpu_counters_destroy(nn->counter, NFSD_STATS_COUNTERS_NUM);
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}
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void nfsd_proc_stat_init(struct net *net)
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{
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struct nfsd_net *nn = net_generic(net, nfsd_net_id);
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@ -10,11 +10,6 @@
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#include <uapi/linux/nfsd/stats.h>
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#include <linux/percpu_counter.h>
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int nfsd_percpu_counters_init(struct percpu_counter *counters, int num);
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void nfsd_percpu_counters_reset(struct percpu_counter *counters, int num);
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void nfsd_percpu_counters_destroy(struct percpu_counter *counters, int num);
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int nfsd_stat_counters_init(struct nfsd_net *nn);
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void nfsd_stat_counters_destroy(struct nfsd_net *nn);
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void nfsd_proc_stat_init(struct net *net);
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void nfsd_proc_stat_shutdown(struct net *net);
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