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| author | Josef Bacik <jbacik@fusionio.com> | 2012-08-14 22:20:52 +0200 |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2012-10-01 21:19:02 +0200 |
| commit | 54338b5cc4fa3cfe260e8e4ade8b62a9079ea3f9 (patch) | |
| tree | a522e7606064efdfe51b444c5c8cec158c9ca2f6 | |
| parent | Btrfs: update last trans if we don't update the inode (diff) | |
| download | linux-54338b5cc4fa3cfe260e8e4ade8b62a9079ea3f9.tar.xz linux-54338b5cc4fa3cfe260e8e4ade8b62a9079ea3f9.zip | |
Btrfs: do not allocate chunks as agressively
Swinging this pendulum back the other way. We've been allocating chunks up
to 2% of the disk no matter how much we actually have allocated. So instead
fix this calculation to only allocate chunks if we have more than 80% of the
space available allocated. Please test this as it will likely cause all
sorts of ENOSPC problems to pop up suddenly. Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index ba58024d40d3..62fc92f2b9d7 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -3504,7 +3504,8 @@ static int should_alloc_chunk(struct btrfs_root *root, * and purposes it's used space. Don't worry about locking the * global_rsv, it doesn't change except when the transaction commits. */ - num_allocated += global_rsv->size; + if (sinfo->flags & BTRFS_BLOCK_GROUP_METADATA) + num_allocated += global_rsv->size; /* * in limited mode, we want to have some free space up to @@ -3518,15 +3519,8 @@ static int should_alloc_chunk(struct btrfs_root *root, if (num_bytes - num_allocated < thresh) return 1; } - thresh = btrfs_super_total_bytes(root->fs_info->super_copy); - /* 256MB or 2% of the FS */ - thresh = max_t(u64, 256 * 1024 * 1024, div_factor_fine(thresh, 2)); - /* system chunks need a much small threshold */ - if (sinfo->flags & BTRFS_BLOCK_GROUP_SYSTEM) - thresh = 32 * 1024 * 1024; - - if (num_bytes > thresh && sinfo->bytes_used < div_factor(num_bytes, 8)) + if (num_allocated + alloc_bytes < div_factor(num_bytes, 8)) return 0; return 1; } |