diff options
Diffstat (limited to 'fs/ext4/mballoc.c')
| -rw-r--r-- | fs/ext4/mballoc.c | 33 |
1 files changed, 13 insertions, 20 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index ff47347012f4..a8d99f676fb1 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4160,7 +4160,7 @@ ext4_mb_discard_group_preallocations(struct super_block *sb, struct ext4_buddy e4b; int err; int busy = 0; - int free = 0; + int free, free_total = 0; mb_debug(sb, "discard preallocation for group %u\n", group); if (list_empty(&grp->bb_prealloc_list)) @@ -4188,6 +4188,7 @@ ext4_mb_discard_group_preallocations(struct super_block *sb, INIT_LIST_HEAD(&list); repeat: + free = 0; ext4_lock_group(sb, group); list_for_each_entry_safe(pa, tmp, &grp->bb_prealloc_list, pa_group_list) { @@ -4217,22 +4218,6 @@ repeat: list_add(&pa->u.pa_tmp_list, &list); } - /* if we still need more blocks and some PAs were used, try again */ - if (free < needed && busy) { - busy = 0; - ext4_unlock_group(sb, group); - cond_resched(); - goto repeat; - } - - /* found anything to free? */ - if (list_empty(&list)) { - BUG_ON(free != 0); - mb_debug(sb, "Someone else may have freed PA for this group %u\n", - group); - goto out; - } - /* now free all selected PAs */ list_for_each_entry_safe(pa, tmp, &list, u.pa_tmp_list) { @@ -4250,14 +4235,22 @@ repeat: call_rcu(&(pa)->u.pa_rcu, ext4_mb_pa_callback); } -out: + free_total += free; + + /* if we still need more blocks and some PAs were used, try again */ + if (free_total < needed && busy) { + ext4_unlock_group(sb, group); + cond_resched(); + busy = 0; + goto repeat; + } ext4_unlock_group(sb, group); ext4_mb_unload_buddy(&e4b); put_bh(bitmap_bh); out_dbg: mb_debug(sb, "discarded (%d) blocks preallocated for group %u bb_free (%d)\n", - free, group, grp->bb_free); - return free; + free_total, group, grp->bb_free); + return free_total; } /* |