Displaying 1 result from an estimated 1 matches for "btrfs_degenerate_alloc_profile".
2012 Jan 17
8
[RFC][PATCH 1/2] Btrfs: try to allocate new chunks with degenerated profile
...lags)
return flags;
}
+/*
+ * Degenerate the alloc profile:
+ * RAID10 -> RAID1 -> DUP
+ * RAID0 -> SINGLE
+ *
+ * This is used when there is no enough disk space to do chunk allocation.
+ * After degenerating the profile, we will try to allocate new chunks again.
+ */
+static u64 btrfs_degenerate_alloc_profile(u64 flags)
+{
+ if (flags & BTRFS_BLOCK_GROUP_RAID10) {
+ flags &= ~BTRFS_BLOCK_GROUP_RAID10;
+ flags |= BTRFS_BLOCK_GROUP_RAID1;
+ } else if (flags & BTRFS_BLOCK_GROUP_RAID1) {
+ flags &= ~BTRFS_BLOCK_GROUP_RAID1;
+ flags |= BTRFS_BLOCK_GROUP_DUP;
+ } else if (flags & BTRFS...