diff options
| -rw-r--r-- | fs/btrfs/space-info.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/btrfs/space-info.c b/fs/btrfs/space-info.c index 0e88a1482624..639787beb57a 100644 --- a/fs/btrfs/space-info.c +++ b/fs/btrfs/space-info.c @@ -864,8 +864,14 @@ static bool need_preemptive_reclaim(struct btrfs_fs_info *fs_info, * clearly be heavy enough to warrant preemptive flushing. In the case * of heavy DIO or ordered reservations, preemptive flushing will just * waste time and cause us to slow down. + * + * We want to make sure we truly are maxed out on ordered however, so + * cut ordered in half, and if it's still higher than delalloc then we + * can keep flushing. This is to avoid the case where we start + * flushing, and now delalloc == ordered and we stop preemptively + * flushing when we could still have several gigs of delalloc to flush. */ - ordered = percpu_counter_read_positive(&fs_info->ordered_bytes); + ordered = percpu_counter_read_positive(&fs_info->ordered_bytes) >> 1; delalloc = percpu_counter_read_positive(&fs_info->delalloc_bytes); if (ordered >= delalloc) used += fs_info->delayed_refs_rsv.reserved + |