Commit 0a7ab79c authored by Abhijith Das's avatar Abhijith Das Committed by Steven Whitehouse

GFS2: change gfs2_quota_scan into a shrinker

Deallocation of gfs2_quota_data objects now happens on-demand through a
shrinker instead of routinely deallocating through the quotad daemon.
Signed-off-by: default avatarAbhijith Das <adas@redhat.com>
Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
parent 2db2aac2
...@@ -283,7 +283,9 @@ enum { ...@@ -283,7 +283,9 @@ enum {
struct gfs2_quota_data { struct gfs2_quota_data {
struct list_head qd_list; struct list_head qd_list;
unsigned int qd_count; struct list_head qd_reclaim;
atomic_t qd_count;
u32 qd_id; u32 qd_id;
unsigned long qd_flags; /* QDF_... */ unsigned long qd_flags; /* QDF_... */
...@@ -303,7 +305,6 @@ struct gfs2_quota_data { ...@@ -303,7 +305,6 @@ struct gfs2_quota_data {
u64 qd_sync_gen; u64 qd_sync_gen;
unsigned long qd_last_warn; unsigned long qd_last_warn;
unsigned long qd_last_touched;
}; };
struct gfs2_trans { struct gfs2_trans {
...@@ -406,7 +407,6 @@ struct gfs2_tune { ...@@ -406,7 +407,6 @@ struct gfs2_tune {
unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */ unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
unsigned int gt_quota_scale_num; /* Numerator */ unsigned int gt_quota_scale_num; /* Numerator */
unsigned int gt_quota_scale_den; /* Denominator */ unsigned int gt_quota_scale_den; /* Denominator */
unsigned int gt_quota_cache_secs;
unsigned int gt_quota_quantum; /* Secs between syncs to quota file */ unsigned int gt_quota_quantum; /* Secs between syncs to quota file */
unsigned int gt_new_files_jdata; unsigned int gt_new_files_jdata;
unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */ unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */
......
...@@ -23,6 +23,12 @@ ...@@ -23,6 +23,12 @@
#include "sys.h" #include "sys.h"
#include "util.h" #include "util.h"
#include "glock.h" #include "glock.h"
#include "quota.h"
static struct shrinker qd_shrinker = {
.shrink = gfs2_shrink_qd_memory,
.seeks = DEFAULT_SEEKS,
};
static void gfs2_init_inode_once(void *foo) static void gfs2_init_inode_once(void *foo)
{ {
...@@ -100,6 +106,8 @@ static int __init init_gfs2_fs(void) ...@@ -100,6 +106,8 @@ static int __init init_gfs2_fs(void)
if (!gfs2_quotad_cachep) if (!gfs2_quotad_cachep)
goto fail; goto fail;
register_shrinker(&qd_shrinker);
error = register_filesystem(&gfs2_fs_type); error = register_filesystem(&gfs2_fs_type);
if (error) if (error)
goto fail; goto fail;
...@@ -117,6 +125,7 @@ static int __init init_gfs2_fs(void) ...@@ -117,6 +125,7 @@ static int __init init_gfs2_fs(void)
fail_unregister: fail_unregister:
unregister_filesystem(&gfs2_fs_type); unregister_filesystem(&gfs2_fs_type);
fail: fail:
unregister_shrinker(&qd_shrinker);
gfs2_glock_exit(); gfs2_glock_exit();
if (gfs2_quotad_cachep) if (gfs2_quotad_cachep)
...@@ -145,6 +154,7 @@ static int __init init_gfs2_fs(void) ...@@ -145,6 +154,7 @@ static int __init init_gfs2_fs(void)
static void __exit exit_gfs2_fs(void) static void __exit exit_gfs2_fs(void)
{ {
unregister_shrinker(&qd_shrinker);
gfs2_glock_exit(); gfs2_glock_exit();
gfs2_unregister_debugfs(); gfs2_unregister_debugfs();
unregister_filesystem(&gfs2_fs_type); unregister_filesystem(&gfs2_fs_type);
......
...@@ -442,6 +442,7 @@ static int stuffed_readpage(struct gfs2_inode *ip, struct page *page) ...@@ -442,6 +442,7 @@ static int stuffed_readpage(struct gfs2_inode *ip, struct page *page)
*/ */
if (unlikely(page->index)) { if (unlikely(page->index)) {
zero_user(page, 0, PAGE_CACHE_SIZE); zero_user(page, 0, PAGE_CACHE_SIZE);
SetPageUptodate(page);
return 0; return 0;
} }
......
...@@ -63,7 +63,6 @@ static void gfs2_tune_init(struct gfs2_tune *gt) ...@@ -63,7 +63,6 @@ static void gfs2_tune_init(struct gfs2_tune *gt)
gt->gt_quota_warn_period = 10; gt->gt_quota_warn_period = 10;
gt->gt_quota_scale_num = 1; gt->gt_quota_scale_num = 1;
gt->gt_quota_scale_den = 1; gt->gt_quota_scale_den = 1;
gt->gt_quota_cache_secs = 300;
gt->gt_quota_quantum = 60; gt->gt_quota_quantum = 60;
gt->gt_new_files_jdata = 0; gt->gt_new_files_jdata = 0;
gt->gt_max_readahead = 1 << 18; gt->gt_max_readahead = 1 << 18;
......
...@@ -80,6 +80,53 @@ struct gfs2_quota_change_host { ...@@ -80,6 +80,53 @@ struct gfs2_quota_change_host {
u32 qc_id; u32 qc_id;
}; };
static LIST_HEAD(qd_lru_list);
static atomic_t qd_lru_count = ATOMIC_INIT(0);
static spinlock_t qd_lru_lock = SPIN_LOCK_UNLOCKED;
int gfs2_shrink_qd_memory(int nr, gfp_t gfp_mask)
{
struct gfs2_quota_data *qd;
struct gfs2_sbd *sdp;
if (nr == 0)
goto out;
if (!(gfp_mask & __GFP_FS))
return -1;
spin_lock(&qd_lru_lock);
while (nr && !list_empty(&qd_lru_list)) {
qd = list_entry(qd_lru_list.next,
struct gfs2_quota_data, qd_reclaim);
sdp = qd->qd_gl->gl_sbd;
/* Free from the filesystem-specific list */
list_del(&qd->qd_list);
spin_lock(&sdp->sd_quota_spin);
gfs2_assert_warn(sdp, !qd->qd_change);
gfs2_assert_warn(sdp, !qd->qd_slot_count);
gfs2_assert_warn(sdp, !qd->qd_bh_count);
gfs2_lvb_unhold(qd->qd_gl);
spin_unlock(&sdp->sd_quota_spin);
atomic_dec(&sdp->sd_quota_count);
/* Delete it from the common reclaim list */
list_del_init(&qd->qd_reclaim);
atomic_dec(&qd_lru_count);
spin_unlock(&qd_lru_lock);
kmem_cache_free(gfs2_quotad_cachep, qd);
spin_lock(&qd_lru_lock);
nr--;
}
spin_unlock(&qd_lru_lock);
out:
return (atomic_read(&qd_lru_count) * sysctl_vfs_cache_pressure) / 100;
}
static u64 qd2offset(struct gfs2_quota_data *qd) static u64 qd2offset(struct gfs2_quota_data *qd)
{ {
u64 offset; u64 offset;
...@@ -100,11 +147,12 @@ static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id, ...@@ -100,11 +147,12 @@ static int qd_alloc(struct gfs2_sbd *sdp, int user, u32 id,
if (!qd) if (!qd)
return -ENOMEM; return -ENOMEM;
qd->qd_count = 1; atomic_set(&qd->qd_count, 1);
qd->qd_id = id; qd->qd_id = id;
if (user) if (user)
set_bit(QDF_USER, &qd->qd_flags); set_bit(QDF_USER, &qd->qd_flags);
qd->qd_slot = -1; qd->qd_slot = -1;
INIT_LIST_HEAD(&qd->qd_reclaim);
error = gfs2_glock_get(sdp, 2 * (u64)id + !user, error = gfs2_glock_get(sdp, 2 * (u64)id + !user,
&gfs2_quota_glops, CREATE, &qd->qd_gl); &gfs2_quota_glops, CREATE, &qd->qd_gl);
...@@ -135,11 +183,17 @@ static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create, ...@@ -135,11 +183,17 @@ static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
for (;;) { for (;;) {
found = 0; found = 0;
spin_lock(&sdp->sd_quota_spin); spin_lock(&qd_lru_lock);
list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
if (qd->qd_id == id && if (qd->qd_id == id &&
!test_bit(QDF_USER, &qd->qd_flags) == !user) { !test_bit(QDF_USER, &qd->qd_flags) == !user) {
qd->qd_count++; if (!atomic_read(&qd->qd_count) &&
!list_empty(&qd->qd_reclaim)) {
/* Remove it from reclaim list */
list_del_init(&qd->qd_reclaim);
atomic_dec(&qd_lru_count);
}
atomic_inc(&qd->qd_count);
found = 1; found = 1;
break; break;
} }
...@@ -155,7 +209,7 @@ static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create, ...@@ -155,7 +209,7 @@ static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
new_qd = NULL; new_qd = NULL;
} }
spin_unlock(&sdp->sd_quota_spin); spin_unlock(&qd_lru_lock);
if (qd || !create) { if (qd || !create) {
if (new_qd) { if (new_qd) {
...@@ -175,21 +229,18 @@ static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create, ...@@ -175,21 +229,18 @@ static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
static void qd_hold(struct gfs2_quota_data *qd) static void qd_hold(struct gfs2_quota_data *qd)
{ {
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
gfs2_assert(sdp, atomic_read(&qd->qd_count));
spin_lock(&sdp->sd_quota_spin); atomic_inc(&qd->qd_count);
gfs2_assert(sdp, qd->qd_count);
qd->qd_count++;
spin_unlock(&sdp->sd_quota_spin);
} }
static void qd_put(struct gfs2_quota_data *qd) static void qd_put(struct gfs2_quota_data *qd)
{ {
struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd; if (atomic_dec_and_lock(&qd->qd_count, &qd_lru_lock)) {
spin_lock(&sdp->sd_quota_spin); /* Add to the reclaim list */
gfs2_assert(sdp, qd->qd_count); list_add_tail(&qd->qd_reclaim, &qd_lru_list);
if (!--qd->qd_count) atomic_inc(&qd_lru_count);
qd->qd_last_touched = jiffies; spin_unlock(&qd_lru_lock);
spin_unlock(&sdp->sd_quota_spin); }
} }
static int slot_get(struct gfs2_quota_data *qd) static int slot_get(struct gfs2_quota_data *qd)
...@@ -330,6 +381,7 @@ static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) ...@@ -330,6 +381,7 @@ static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
if (sdp->sd_vfs->s_flags & MS_RDONLY) if (sdp->sd_vfs->s_flags & MS_RDONLY)
return 0; return 0;
spin_lock(&qd_lru_lock);
spin_lock(&sdp->sd_quota_spin); spin_lock(&sdp->sd_quota_spin);
list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) { list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
...@@ -341,8 +393,8 @@ static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) ...@@ -341,8 +393,8 @@ static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
list_move_tail(&qd->qd_list, &sdp->sd_quota_list); list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
set_bit(QDF_LOCKED, &qd->qd_flags); set_bit(QDF_LOCKED, &qd->qd_flags);
gfs2_assert_warn(sdp, qd->qd_count); gfs2_assert_warn(sdp, atomic_read(&qd->qd_count));
qd->qd_count++; atomic_inc(&qd->qd_count);
qd->qd_change_sync = qd->qd_change; qd->qd_change_sync = qd->qd_change;
gfs2_assert_warn(sdp, qd->qd_slot_count); gfs2_assert_warn(sdp, qd->qd_slot_count);
qd->qd_slot_count++; qd->qd_slot_count++;
...@@ -355,6 +407,7 @@ static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp) ...@@ -355,6 +407,7 @@ static int qd_fish(struct gfs2_sbd *sdp, struct gfs2_quota_data **qdp)
qd = NULL; qd = NULL;
spin_unlock(&sdp->sd_quota_spin); spin_unlock(&sdp->sd_quota_spin);
spin_unlock(&qd_lru_lock);
if (qd) { if (qd) {
gfs2_assert_warn(sdp, qd->qd_change_sync); gfs2_assert_warn(sdp, qd->qd_change_sync);
...@@ -379,24 +432,27 @@ static int qd_trylock(struct gfs2_quota_data *qd) ...@@ -379,24 +432,27 @@ static int qd_trylock(struct gfs2_quota_data *qd)
if (sdp->sd_vfs->s_flags & MS_RDONLY) if (sdp->sd_vfs->s_flags & MS_RDONLY)
return 0; return 0;
spin_lock(&qd_lru_lock);
spin_lock(&sdp->sd_quota_spin); spin_lock(&sdp->sd_quota_spin);
if (test_bit(QDF_LOCKED, &qd->qd_flags) || if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
!test_bit(QDF_CHANGE, &qd->qd_flags)) { !test_bit(QDF_CHANGE, &qd->qd_flags)) {
spin_unlock(&sdp->sd_quota_spin); spin_unlock(&sdp->sd_quota_spin);
spin_unlock(&qd_lru_lock);
return 0; return 0;
} }
list_move_tail(&qd->qd_list, &sdp->sd_quota_list); list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
set_bit(QDF_LOCKED, &qd->qd_flags); set_bit(QDF_LOCKED, &qd->qd_flags);
gfs2_assert_warn(sdp, qd->qd_count); gfs2_assert_warn(sdp, atomic_read(&qd->qd_count));
qd->qd_count++; atomic_inc(&qd->qd_count);
qd->qd_change_sync = qd->qd_change; qd->qd_change_sync = qd->qd_change;
gfs2_assert_warn(sdp, qd->qd_slot_count); gfs2_assert_warn(sdp, qd->qd_slot_count);
qd->qd_slot_count++; qd->qd_slot_count++;
spin_unlock(&sdp->sd_quota_spin); spin_unlock(&sdp->sd_quota_spin);
spin_unlock(&qd_lru_lock);
gfs2_assert_warn(sdp, qd->qd_change_sync); gfs2_assert_warn(sdp, qd->qd_change_sync);
if (bh_get(qd)) { if (bh_get(qd)) {
...@@ -820,7 +876,6 @@ static int do_glock(struct gfs2_quota_data *qd, int force_refresh, ...@@ -820,7 +876,6 @@ static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
gfs2_glock_dq_uninit(&i_gh); gfs2_glock_dq_uninit(&i_gh);
gfs2_quota_in(&q, buf); gfs2_quota_in(&q, buf);
qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb; qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC); qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
...@@ -1171,13 +1226,14 @@ int gfs2_quota_init(struct gfs2_sbd *sdp) ...@@ -1171,13 +1226,14 @@ int gfs2_quota_init(struct gfs2_sbd *sdp)
qd->qd_change = qc.qc_change; qd->qd_change = qc.qc_change;
qd->qd_slot = slot; qd->qd_slot = slot;
qd->qd_slot_count = 1; qd->qd_slot_count = 1;
qd->qd_last_touched = jiffies;
spin_lock(&qd_lru_lock);
spin_lock(&sdp->sd_quota_spin); spin_lock(&sdp->sd_quota_spin);
gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1); gfs2_icbit_munge(sdp, sdp->sd_quota_bitmap, slot, 1);
spin_unlock(&sdp->sd_quota_spin);
list_add(&qd->qd_list, &sdp->sd_quota_list); list_add(&qd->qd_list, &sdp->sd_quota_list);
atomic_inc(&sdp->sd_quota_count); atomic_inc(&sdp->sd_quota_count);
spin_unlock(&sdp->sd_quota_spin); spin_unlock(&qd_lru_lock);
found++; found++;
} }
...@@ -1197,61 +1253,39 @@ int gfs2_quota_init(struct gfs2_sbd *sdp) ...@@ -1197,61 +1253,39 @@ int gfs2_quota_init(struct gfs2_sbd *sdp)
return error; return error;
} }
static void gfs2_quota_scan(struct gfs2_sbd *sdp)
{
struct gfs2_quota_data *qd, *safe;
LIST_HEAD(dead);
spin_lock(&sdp->sd_quota_spin);
list_for_each_entry_safe(qd, safe, &sdp->sd_quota_list, qd_list) {
if (!qd->qd_count &&
time_after_eq(jiffies, qd->qd_last_touched +
gfs2_tune_get(sdp, gt_quota_cache_secs) * HZ)) {
list_move(&qd->qd_list, &dead);
gfs2_assert_warn(sdp,
atomic_read(&sdp->sd_quota_count) > 0);
atomic_dec(&sdp->sd_quota_count);
}
}
spin_unlock(&sdp->sd_quota_spin);
while (!list_empty(&dead)) {
qd = list_entry(dead.next, struct gfs2_quota_data, qd_list);
list_del(&qd->qd_list);
gfs2_assert_warn(sdp, !qd->qd_change);
gfs2_assert_warn(sdp, !qd->qd_slot_count);
gfs2_assert_warn(sdp, !qd->qd_bh_count);
gfs2_lvb_unhold(qd->qd_gl);
kmem_cache_free(gfs2_quotad_cachep, qd);
}
}
void gfs2_quota_cleanup(struct gfs2_sbd *sdp) void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
{ {
struct list_head *head = &sdp->sd_quota_list; struct list_head *head = &sdp->sd_quota_list;
struct gfs2_quota_data *qd; struct gfs2_quota_data *qd;
unsigned int x; unsigned int x;
spin_lock(&sdp->sd_quota_spin); spin_lock(&qd_lru_lock);
while (!list_empty(head)) { while (!list_empty(head)) {
qd = list_entry(head->prev, struct gfs2_quota_data, qd_list); qd = list_entry(head->prev, struct gfs2_quota_data, qd_list);
if (qd->qd_count > 1 || spin_lock(&sdp->sd_quota_spin);
(qd->qd_count && !test_bit(QDF_CHANGE, &qd->qd_flags))) { if (atomic_read(&qd->qd_count) > 1 ||
list_move(&qd->qd_list, head); (atomic_read(&qd->qd_count) &&
!test_bit(QDF_CHANGE, &qd->qd_flags))) {
spin_unlock(&sdp->sd_quota_spin); spin_unlock(&sdp->sd_quota_spin);
list_move(&qd->qd_list, head);
spin_unlock(&qd_lru_lock);
schedule(); schedule();
spin_lock(&sdp->sd_quota_spin); spin_lock(&qd_lru_lock);
continue; continue;
} }
spin_unlock(&sdp->sd_quota_spin);
list_del(&qd->qd_list); list_del(&qd->qd_list);
/* Also remove if this qd exists in the reclaim list */
if (!list_empty(&qd->qd_reclaim)) {
list_del_init(&qd->qd_reclaim);
atomic_dec(&qd_lru_count);
}
atomic_dec(&sdp->sd_quota_count); atomic_dec(&sdp->sd_quota_count);
spin_unlock(&sdp->sd_quota_spin); spin_unlock(&qd_lru_lock);
if (!qd->qd_count) { if (!atomic_read(&qd->qd_count)) {
gfs2_assert_warn(sdp, !qd->qd_change); gfs2_assert_warn(sdp, !qd->qd_change);
gfs2_assert_warn(sdp, !qd->qd_slot_count); gfs2_assert_warn(sdp, !qd->qd_slot_count);
} else } else
...@@ -1261,9 +1295,9 @@ void gfs2_quota_cleanup(struct gfs2_sbd *sdp) ...@@ -1261,9 +1295,9 @@ void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
gfs2_lvb_unhold(qd->qd_gl); gfs2_lvb_unhold(qd->qd_gl);
kmem_cache_free(gfs2_quotad_cachep, qd); kmem_cache_free(gfs2_quotad_cachep, qd);
spin_lock(&sdp->sd_quota_spin); spin_lock(&qd_lru_lock);
} }
spin_unlock(&sdp->sd_quota_spin); spin_unlock(&qd_lru_lock);
gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count)); gfs2_assert_warn(sdp, !atomic_read(&sdp->sd_quota_count));
...@@ -1341,9 +1375,6 @@ int gfs2_quotad(void *data) ...@@ -1341,9 +1375,6 @@ int gfs2_quotad(void *data)
quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t, quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
&quotad_timeo, &tune->gt_quota_quantum); &quotad_timeo, &tune->gt_quota_quantum);
/* FIXME: This should be turned into a shrinker */
gfs2_quota_scan(sdp);
/* Check for & recover partially truncated inodes */ /* Check for & recover partially truncated inodes */
quotad_check_trunc_list(sdp); quotad_check_trunc_list(sdp);
......
...@@ -49,4 +49,6 @@ static inline int gfs2_quota_lock_check(struct gfs2_inode *ip) ...@@ -49,4 +49,6 @@ static inline int gfs2_quota_lock_check(struct gfs2_inode *ip)
return ret; return ret;
} }
extern int gfs2_shrink_qd_memory(int nr, gfp_t gfp_mask);
#endif /* __QUOTA_DOT_H__ */ #endif /* __QUOTA_DOT_H__ */
...@@ -373,7 +373,6 @@ TUNE_ATTR(complain_secs, 0); ...@@ -373,7 +373,6 @@ TUNE_ATTR(complain_secs, 0);
TUNE_ATTR(statfs_slow, 0); TUNE_ATTR(statfs_slow, 0);
TUNE_ATTR(new_files_jdata, 0); TUNE_ATTR(new_files_jdata, 0);
TUNE_ATTR(quota_simul_sync, 1); TUNE_ATTR(quota_simul_sync, 1);
TUNE_ATTR(quota_cache_secs, 1);
TUNE_ATTR(stall_secs, 1); TUNE_ATTR(stall_secs, 1);
TUNE_ATTR(statfs_quantum, 1); TUNE_ATTR(statfs_quantum, 1);
TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process); TUNE_ATTR_DAEMON(recoverd_secs, recoverd_process);
...@@ -389,7 +388,6 @@ static struct attribute *tune_attrs[] = { ...@@ -389,7 +388,6 @@ static struct attribute *tune_attrs[] = {
&tune_attr_complain_secs.attr, &tune_attr_complain_secs.attr,
&tune_attr_statfs_slow.attr, &tune_attr_statfs_slow.attr,
&tune_attr_quota_simul_sync.attr, &tune_attr_quota_simul_sync.attr,
&tune_attr_quota_cache_secs.attr,
&tune_attr_stall_secs.attr, &tune_attr_stall_secs.attr,
&tune_attr_statfs_quantum.attr, &tune_attr_statfs_quantum.attr,
&tune_attr_recoverd_secs.attr, &tune_attr_recoverd_secs.attr,
......
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