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| author | Chris Mason <chris.mason@oracle.com> | 2012-01-16 08:13:11 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2012-01-16 15:38:24 -0500 |
| commit | 96bdc7dc61fb1b1e8e858dafb13abee8482ba064 (patch) | |
| tree | eddbfc7a931c7063ded4505c99d11d1702117064 | |
| parent | f248679e86fead40cc78e724c7181d6bec1a2046 (diff) | |
| download | blackbird-op-linux-96bdc7dc61fb1b1e8e858dafb13abee8482ba064.tar.gz blackbird-op-linux-96bdc7dc61fb1b1e8e858dafb13abee8482ba064.zip | |
Btrfs: use larger system chunks
system chunks by default are very small. This makes them slightly
larger and also fixes the conditional checks to make sure we don't
allocate a billion of them at once.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 3 | ||||
| -rw-r--r-- | fs/btrfs/volumes.c | 2 |
2 files changed, 4 insertions, 1 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index e0ad5f0f895e..700879ed64cf 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -3384,6 +3384,9 @@ static int should_alloc_chunk(struct btrfs_root *root, /* 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)) return 0; diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 59e878f9fdcc..7ffdb154daec 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -3166,7 +3166,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, max_stripe_size = 256 * 1024 * 1024; max_chunk_size = max_stripe_size; } else if (type & BTRFS_BLOCK_GROUP_SYSTEM) { - max_stripe_size = 8 * 1024 * 1024; + max_stripe_size = 32 * 1024 * 1024; max_chunk_size = 2 * max_stripe_size; } else { printk(KERN_ERR "btrfs: invalid chunk type 0x%llx requested\n", |
