Commit 96bdc7dc authored by Chris Mason's avatar Chris Mason

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: default avatarChris Mason <chris.mason@oracle.com>
parent f248679e
...@@ -3384,6 +3384,9 @@ static int should_alloc_chunk(struct btrfs_root *root, ...@@ -3384,6 +3384,9 @@ static int should_alloc_chunk(struct btrfs_root *root,
/* 256MB or 2% of the FS */ /* 256MB or 2% of the FS */
thresh = max_t(u64, 256 * 1024 * 1024, div_factor_fine(thresh, 2)); 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_bytes > thresh && sinfo->bytes_used < div_factor(num_bytes, 8))
return 0; return 0;
......
...@@ -3166,7 +3166,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans, ...@@ -3166,7 +3166,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
max_stripe_size = 256 * 1024 * 1024; max_stripe_size = 256 * 1024 * 1024;
max_chunk_size = max_stripe_size; max_chunk_size = max_stripe_size;
} else if (type & BTRFS_BLOCK_GROUP_SYSTEM) { } 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; max_chunk_size = 2 * max_stripe_size;
} else { } else {
printk(KERN_ERR "btrfs: invalid chunk type 0x%llx requested\n", printk(KERN_ERR "btrfs: invalid chunk type 0x%llx requested\n",
......
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