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fs: nfsd: use group allocation/free of per-cpu counters API

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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>
This commit is contained in:
Kefeng Wang 2024-03-25 21:21:39 +08:00 committed by Chuck Lever
parent 33a1e6ea73
commit 7d12cce878
4 changed files with 13 additions and 55 deletions
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14
fs/nfsd/export.c
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@ -334,20 +334,24 @@ static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc)
static int export_stats_init(struct export_stats *stats)
{
stats->start_time = ktime_get_seconds();
return nfsd_percpu_counters_init(stats->counter, EXP_STATS_COUNTERS_NUM);
return percpu_counter_init_many(stats->counter, 0, GFP_KERNEL,
EXP_STATS_COUNTERS_NUM);
}
static void export_stats_reset(struct export_stats *stats)
{
if (stats)
nfsd_percpu_counters_reset(stats->counter,
EXP_STATS_COUNTERS_NUM);
if (stats) {
int i;
for (i = 0; i < EXP_STATS_COUNTERS_NUM; i++)
percpu_counter_set(&stats->counter[i], 0);
}
}
static void export_stats_destroy(struct export_stats *stats)
{
if (stats)
nfsd_percpu_counters_destroy(stats->counter,
percpu_counter_destroy_many(stats->counter,
EXP_STATS_COUNTERS_NUM);
}

5
fs/nfsd/nfsctl.c
View File

@ -1672,7 +1672,8 @@ static __net_init int nfsd_net_init(struct net *net)
retval = nfsd_idmap_init(net);
if (retval)
goto out_idmap_error;
retval = nfsd_stat_counters_init(nn);
retval = percpu_counter_init_many(nn->counter, 0, GFP_KERNEL,
NFSD_STATS_COUNTERS_NUM);
if (retval)
goto out_repcache_error;
memset(&nn->nfsd_svcstats, 0, sizeof(nn->nfsd_svcstats));
@ -1704,7 +1705,7 @@ static __net_exit void nfsd_net_exit(struct net *net)
struct nfsd_net *nn = net_generic(net, nfsd_net_id);
nfsd_proc_stat_shutdown(net);
nfsd_stat_counters_destroy(nn);
percpu_counter_destroy_many(nn->counter, NFSD_STATS_COUNTERS_NUM);
nfsd_idmap_shutdown(net);
nfsd_export_shutdown(net);
nfsd_netns_free_versions(nn);

42
fs/nfsd/stats.c
View File

@ -73,48 +73,6 @@ static int nfsd_show(struct seq_file *seq, void *v)
DEFINE_PROC_SHOW_ATTRIBUTE(nfsd);
int nfsd_percpu_counters_init(struct percpu_counter *counters, int num)
{
int i, err = 0;
for (i = 0; !err && i < num; i++)
err = percpu_counter_init(&counters[i], 0, GFP_KERNEL);
if (!err)
return 0;
for (; i > 0; i--)
percpu_counter_destroy(&counters[i-1]);
return err;
}
void nfsd_percpu_counters_reset(struct percpu_counter counters[], int num)
{
int i;
for (i = 0; i < num; i++)
percpu_counter_set(&counters[i], 0);
}
void nfsd_percpu_counters_destroy(struct percpu_counter counters[], int num)
{
int i;
for (i = 0; i < num; i++)
percpu_counter_destroy(&counters[i]);
}
int nfsd_stat_counters_init(struct nfsd_net *nn)
{
return nfsd_percpu_counters_init(nn->counter, NFSD_STATS_COUNTERS_NUM);
}
void nfsd_stat_counters_destroy(struct nfsd_net *nn)
{
nfsd_percpu_counters_destroy(nn->counter, NFSD_STATS_COUNTERS_NUM);
}
void nfsd_proc_stat_init(struct net *net)
{
struct nfsd_net *nn = net_generic(net, nfsd_net_id);

5
fs/nfsd/stats.h
View File

@ -10,11 +10,6 @@
#include <uapi/linux/nfsd/stats.h>
#include <linux/percpu_counter.h>
int nfsd_percpu_counters_init(struct percpu_counter *counters, int num);
void nfsd_percpu_counters_reset(struct percpu_counter *counters, int num);
void nfsd_percpu_counters_destroy(struct percpu_counter *counters, int num);
int nfsd_stat_counters_init(struct nfsd_net *nn);
void nfsd_stat_counters_destroy(struct nfsd_net *nn);
void nfsd_proc_stat_init(struct net *net);
void nfsd_proc_stat_shutdown(struct net *net);