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path: root/fs/xfs/xfs_mount.c
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Diffstat (limited to 'fs/xfs/xfs_mount.c')
-rw-r--r--fs/xfs/xfs_mount.c76
1 files changed, 35 insertions, 41 deletions
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 4fa80e63eea2..702ea6a7e648 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -1099,6 +1099,21 @@ xfs_log_sbcount(xfs_mount_t *mp)
return xfs_sync_sb(mp, true);
}
+int
+xfs_mod_icount(
+ struct xfs_mount *mp,
+ int64_t delta)
+{
+ /* deltas are +/-64, hence the large batch size of 128. */
+ __percpu_counter_add(&mp->m_icount, delta, 128);
+ if (percpu_counter_compare(&mp->m_icount, 0) < 0) {
+ ASSERT(0);
+ percpu_counter_add(&mp->m_icount, -delta);
+ return -EINVAL;
+ }
+ return 0;
+}
+
/*
* xfs_mod_incore_sb_unlocked() is a utility routine commonly used to apply
* a delta to a specified field in the in-core superblock. Simply
@@ -1127,14 +1142,8 @@ xfs_mod_incore_sb_unlocked(
*/
switch (field) {
case XFS_SBS_ICOUNT:
- lcounter = (long long)mp->m_sb.sb_icount;
- lcounter += delta;
- if (lcounter < 0) {
- ASSERT(0);
- return -EINVAL;
- }
- mp->m_sb.sb_icount = lcounter;
- return 0;
+ ASSERT(0);
+ return -ENOSPC;
case XFS_SBS_IFREE:
lcounter = (long long)mp->m_sb.sb_ifree;
lcounter += delta;
@@ -1288,8 +1297,9 @@ xfs_mod_incore_sb(
int status;
#ifdef HAVE_PERCPU_SB
- ASSERT(field < XFS_SBS_ICOUNT || field > XFS_SBS_FDBLOCKS);
+ ASSERT(field < XFS_SBS_IFREE || field > XFS_SBS_FDBLOCKS);
#endif
+
spin_lock(&mp->m_sb_lock);
status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd);
spin_unlock(&mp->m_sb_lock);
@@ -1492,7 +1502,6 @@ xfs_icsb_cpu_notify(
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
xfs_icsb_lock(mp);
- xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0);
xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0);
xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0);
xfs_icsb_unlock(mp);
@@ -1504,17 +1513,14 @@ xfs_icsb_cpu_notify(
* re-enable the counters. */
xfs_icsb_lock(mp);
spin_lock(&mp->m_sb_lock);
- xfs_icsb_disable_counter(mp, XFS_SBS_ICOUNT);
xfs_icsb_disable_counter(mp, XFS_SBS_IFREE);
xfs_icsb_disable_counter(mp, XFS_SBS_FDBLOCKS);
- mp->m_sb.sb_icount += cntp->icsb_icount;
mp->m_sb.sb_ifree += cntp->icsb_ifree;
mp->m_sb.sb_fdblocks += cntp->icsb_fdblocks;
memset(cntp, 0, sizeof(xfs_icsb_cnts_t));
- xfs_icsb_balance_counter_locked(mp, XFS_SBS_ICOUNT, 0);
xfs_icsb_balance_counter_locked(mp, XFS_SBS_IFREE, 0);
xfs_icsb_balance_counter_locked(mp, XFS_SBS_FDBLOCKS, 0);
spin_unlock(&mp->m_sb_lock);
@@ -1531,11 +1537,18 @@ xfs_icsb_init_counters(
xfs_mount_t *mp)
{
xfs_icsb_cnts_t *cntp;
+ int error;
int i;
+ error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
+ if (error)
+ return error;
+
mp->m_sb_cnts = alloc_percpu(xfs_icsb_cnts_t);
- if (mp->m_sb_cnts == NULL)
+ if (!mp->m_sb_cnts) {
+ percpu_counter_destroy(&mp->m_icount);
return -ENOMEM;
+ }
for_each_online_cpu(i) {
cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
@@ -1563,13 +1576,14 @@ void
xfs_icsb_reinit_counters(
xfs_mount_t *mp)
{
+ percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount);
+
xfs_icsb_lock(mp);
/*
* start with all counters disabled so that the
* initial balance kicks us off correctly
*/
mp->m_icsb_counters = -1;
- xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0);
xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0);
xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0);
xfs_icsb_unlock(mp);
@@ -1583,6 +1597,9 @@ xfs_icsb_destroy_counters(
unregister_hotcpu_notifier(&mp->m_icsb_notifier);
free_percpu(mp->m_sb_cnts);
}
+
+ percpu_counter_destroy(&mp->m_icount);
+
mutex_destroy(&mp->m_icsb_mutex);
}
@@ -1645,7 +1662,6 @@ xfs_icsb_count(
for_each_online_cpu(i) {
cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
- cnt->icsb_icount += cntp->icsb_icount;
cnt->icsb_ifree += cntp->icsb_ifree;
cnt->icsb_fdblocks += cntp->icsb_fdblocks;
}
@@ -1659,7 +1675,7 @@ xfs_icsb_counter_disabled(
xfs_mount_t *mp,
xfs_sb_field_t field)
{
- ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS));
+ ASSERT((field >= XFS_SBS_IFREE) && (field <= XFS_SBS_FDBLOCKS));
return test_bit(field, &mp->m_icsb_counters);
}
@@ -1670,7 +1686,7 @@ xfs_icsb_disable_counter(
{
xfs_icsb_cnts_t cnt;
- ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS));
+ ASSERT((field >= XFS_SBS_IFREE) && (field <= XFS_SBS_FDBLOCKS));
/*
* If we are already disabled, then there is nothing to do
@@ -1689,9 +1705,6 @@ xfs_icsb_disable_counter(
xfs_icsb_count(mp, &cnt, XFS_ICSB_LAZY_COUNT);
switch(field) {
- case XFS_SBS_ICOUNT:
- mp->m_sb.sb_icount = cnt.icsb_icount;
- break;
case XFS_SBS_IFREE:
mp->m_sb.sb_ifree = cnt.icsb_ifree;
break;
@@ -1716,15 +1729,12 @@ xfs_icsb_enable_counter(
xfs_icsb_cnts_t *cntp;
int i;
- ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS));
+ ASSERT((field >= XFS_SBS_IFREE) && (field <= XFS_SBS_FDBLOCKS));
xfs_icsb_lock_all_counters(mp);
for_each_online_cpu(i) {
cntp = per_cpu_ptr(mp->m_sb_cnts, i);
switch (field) {
- case XFS_SBS_ICOUNT:
- cntp->icsb_icount = count + resid;
- break;
case XFS_SBS_IFREE:
cntp->icsb_ifree = count + resid;
break;
@@ -1750,8 +1760,6 @@ xfs_icsb_sync_counters_locked(
xfs_icsb_count(mp, &cnt, flags);
- if (!xfs_icsb_counter_disabled(mp, XFS_SBS_ICOUNT))
- mp->m_sb.sb_icount = cnt.icsb_icount;
if (!xfs_icsb_counter_disabled(mp, XFS_SBS_IFREE))
mp->m_sb.sb_ifree = cnt.icsb_ifree;
if (!xfs_icsb_counter_disabled(mp, XFS_SBS_FDBLOCKS))
@@ -1805,12 +1813,6 @@ xfs_icsb_balance_counter_locked(
/* update counters - first CPU gets residual*/
switch (field) {
- case XFS_SBS_ICOUNT:
- count = mp->m_sb.sb_icount;
- resid = do_div(count, weight);
- if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE))
- return;
- break;
case XFS_SBS_IFREE:
count = mp->m_sb.sb_ifree;
resid = do_div(count, weight);
@@ -1871,14 +1873,6 @@ again:
}
switch (field) {
- case XFS_SBS_ICOUNT:
- lcounter = icsbp->icsb_icount;
- lcounter += delta;
- if (unlikely(lcounter < 0))
- goto balance_counter;
- icsbp->icsb_icount = lcounter;
- break;
-
case XFS_SBS_IFREE:
lcounter = icsbp->icsb_ifree;
lcounter += delta;
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-15 07:52:24 +0000