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| author | Chris Mason <clm@fb.com> | 2015-02-04 14:59:29 (GMT) |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-04-10 21:06:34 (GMT) |
| commit | 28f75a0e6cdfbce8115487ecbc0968a2c4e01806 (patch) | |
| tree | 14c32d9251117f3ec0f771e95ab17c1d96fe2b94 /fs/btrfs/extent-tree.c | |
| parent | 1262133b8d6f10f5ca7621cd4cf65ddf6254126a (diff) | |
| download | linux-28f75a0e6cdfbce8115487ecbc0968a2c4e01806.tar.xz | |
Btrfs: refill block reserves during truncate
When truncate starts, it allocates some space in the block reserves so
that we'll have enough to update metadata along the way.
For very large files, we can easily go through all of that space as we
loop through the extents. This changes truncate to refill the space
reservation as it progresses through the file.
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index a6f88eb..75f4bed 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2636,7 +2636,7 @@ static inline u64 heads_to_leaves(struct btrfs_root *root, u64 heads) * Takes the number of bytes to be csumm'ed and figures out how many leaves it * would require to store the csums for that many bytes. */ -static u64 csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes) +u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes) { u64 csum_size; u64 num_csums_per_leaf; @@ -2665,7 +2665,7 @@ int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, if (num_heads > 1) num_bytes += (num_heads - 1) * root->nodesize; num_bytes <<= 1; - num_bytes += csum_bytes_to_leaves(root, csum_bytes) * root->nodesize; + num_bytes += btrfs_csum_bytes_to_leaves(root, csum_bytes) * root->nodesize; global_rsv = &root->fs_info->global_block_rsv; /* @@ -5098,13 +5098,12 @@ static u64 calc_csum_metadata_size(struct inode *inode, u64 num_bytes, BTRFS_I(inode)->csum_bytes == 0) return 0; - old_csums = csum_bytes_to_leaves(root, BTRFS_I(inode)->csum_bytes); - + old_csums = btrfs_csum_bytes_to_leaves(root, BTRFS_I(inode)->csum_bytes); if (reserve) BTRFS_I(inode)->csum_bytes += num_bytes; else BTRFS_I(inode)->csum_bytes -= num_bytes; - num_csums = csum_bytes_to_leaves(root, BTRFS_I(inode)->csum_bytes); + num_csums = btrfs_csum_bytes_to_leaves(root, BTRFS_I(inode)->csum_bytes); /* No change, no need to reserve more */ if (old_csums == num_csums) |