diff options
| -rw-r--r-- | fs/btrfs/block-group.c | 37 | ||||
| -rw-r--r-- | fs/btrfs/space-info.c | 18 | ||||
| -rw-r--r-- | fs/btrfs/space-info.h | 3 |
3 files changed, 39 insertions, 19 deletions
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index c12e91ba7d7a..404e050ce8ee 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -1191,7 +1191,6 @@ static int inc_block_group_ro(struct btrfs_block_group *cache, int force) { struct btrfs_space_info *sinfo = cache->space_info; u64 num_bytes; - u64 sinfo_used; int ret = -ENOSPC; spin_lock(&sinfo->lock); @@ -1205,19 +1204,38 @@ static int inc_block_group_ro(struct btrfs_block_group *cache, int force) num_bytes = cache->length - cache->reserved - cache->pinned - cache->bytes_super - cache->used; - sinfo_used = btrfs_space_info_used(sinfo, true); /* - * sinfo_used + num_bytes should always <= sinfo->total_bytes. - * - * Here we make sure if we mark this bg RO, we still have enough - * free space as buffer. + * Data never overcommits, even in mixed mode, so do just the straight + * check of left over space in how much we have allocated. */ - if (force || (sinfo_used + num_bytes <= sinfo->total_bytes)) { + if (force) { + ret = 0; + } else if (sinfo->flags & BTRFS_BLOCK_GROUP_DATA) { + u64 sinfo_used = btrfs_space_info_used(sinfo, true); + + /* + * Here we make sure if we mark this bg RO, we still have enough + * free space as buffer. + */ + if (sinfo_used + num_bytes <= sinfo->total_bytes) + ret = 0; + } else { + /* + * We overcommit metadata, so we need to do the + * btrfs_can_overcommit check here, and we need to pass in + * BTRFS_RESERVE_NO_FLUSH to give ourselves the most amount of + * leeway to allow us to mark this block group as read only. + */ + if (btrfs_can_overcommit(cache->fs_info, sinfo, num_bytes, + BTRFS_RESERVE_NO_FLUSH)) + ret = 0; + } + + if (!ret) { sinfo->bytes_readonly += num_bytes; cache->ro++; list_add_tail(&cache->ro_list, &sinfo->ro_bgs); - ret = 0; } out: spin_unlock(&cache->lock); @@ -1225,9 +1243,6 @@ out: if (ret == -ENOSPC && btrfs_test_opt(cache->fs_info, ENOSPC_DEBUG)) { btrfs_info(cache->fs_info, "unable to make block group %llu ro", cache->start); - btrfs_info(cache->fs_info, - "sinfo_used=%llu bg_num_bytes=%llu", - sinfo_used, num_bytes); btrfs_dump_space_info(cache->fs_info, cache->space_info, 0, 0); } return ret; diff --git a/fs/btrfs/space-info.c b/fs/btrfs/space-info.c index 537bc310a673..01297c5b2666 100644 --- a/fs/btrfs/space-info.c +++ b/fs/btrfs/space-info.c @@ -159,9 +159,9 @@ static inline u64 calc_global_rsv_need_space(struct btrfs_block_rsv *global) return (global->size << 1); } -static int can_overcommit(struct btrfs_fs_info *fs_info, - struct btrfs_space_info *space_info, u64 bytes, - enum btrfs_reserve_flush_enum flush) +int btrfs_can_overcommit(struct btrfs_fs_info *fs_info, + struct btrfs_space_info *space_info, u64 bytes, + enum btrfs_reserve_flush_enum flush) { u64 profile; u64 avail; @@ -226,7 +226,8 @@ again: /* Check and see if our ticket can be satisified now. */ if ((used + ticket->bytes <= space_info->total_bytes) || - can_overcommit(fs_info, space_info, ticket->bytes, flush)) { + btrfs_can_overcommit(fs_info, space_info, ticket->bytes, + flush)) { btrfs_space_info_update_bytes_may_use(fs_info, space_info, ticket->bytes); @@ -639,13 +640,14 @@ btrfs_calc_reclaim_metadata_size(struct btrfs_fs_info *fs_info, return to_reclaim; to_reclaim = min_t(u64, num_online_cpus() * SZ_1M, SZ_16M); - if (can_overcommit(fs_info, space_info, to_reclaim, - BTRFS_RESERVE_FLUSH_ALL)) + if (btrfs_can_overcommit(fs_info, space_info, to_reclaim, + BTRFS_RESERVE_FLUSH_ALL)) return 0; used = btrfs_space_info_used(space_info, true); - if (can_overcommit(fs_info, space_info, SZ_1M, BTRFS_RESERVE_FLUSH_ALL)) + if (btrfs_can_overcommit(fs_info, space_info, SZ_1M, + BTRFS_RESERVE_FLUSH_ALL)) expected = div_factor_fine(space_info->total_bytes, 95); else expected = div_factor_fine(space_info->total_bytes, 90); @@ -1004,7 +1006,7 @@ static int __reserve_metadata_bytes(struct btrfs_fs_info *fs_info, */ if (!pending_tickets && ((used + orig_bytes <= space_info->total_bytes) || - can_overcommit(fs_info, space_info, orig_bytes, flush))) { + btrfs_can_overcommit(fs_info, space_info, orig_bytes, flush))) { btrfs_space_info_update_bytes_may_use(fs_info, space_info, orig_bytes); ret = 0; diff --git a/fs/btrfs/space-info.h b/fs/btrfs/space-info.h index 1a349e3f9cc1..24514cd2c6c1 100644 --- a/fs/btrfs/space-info.h +++ b/fs/btrfs/space-info.h @@ -127,6 +127,9 @@ int btrfs_reserve_metadata_bytes(struct btrfs_root *root, enum btrfs_reserve_flush_enum flush); void btrfs_try_granting_tickets(struct btrfs_fs_info *fs_info, struct btrfs_space_info *space_info); +int btrfs_can_overcommit(struct btrfs_fs_info *fs_info, + struct btrfs_space_info *space_info, u64 bytes, + enum btrfs_reserve_flush_enum flush); static inline void btrfs_space_info_free_bytes_may_use( struct btrfs_fs_info *fs_info, |