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authorDavid Sterba <dsterba@suse.com>2016-04-27 01:03:45 +0200
committerDavid Sterba <dsterba@suse.com>2016-04-29 11:01:47 +0200
commit059f791c6bbaba72dc3c1bd6e2657aacc8552849 (patch)
treefa6c32312908c53934fb9a6b0815cb32fa18fb2e /fs/btrfs
parent03bf5387708069194fbe5072fb57f9542e7a8b82 (diff)
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btrfs: make state preallocation more speculative in __set_extent_bit
Similar to __clear_extent_bit, do not fail if the state preallocation fails as we might not need it. One less BUG_ON. Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/extent_io.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index d39e2241ceb7..8707bcc615ff 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -873,8 +873,14 @@ __set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
bits |= EXTENT_FIRST_DELALLOC;
again:
if (!prealloc && gfpflags_allow_blocking(mask)) {
+ /*
+ * Don't care for allocation failure here because we might end
+ * up not needing the pre-allocated extent state at all, which
+ * is the case if we only have in the tree extent states that
+ * cover our input range and don't cover too any other range.
+ * If we end up needing a new extent state we allocate it later.
+ */
prealloc = alloc_extent_state(mask);
- BUG_ON(!prealloc);
}
spin_lock(&tree->lock);