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authorJosef Bacik <jbacik@fusionio.com>2013-06-04 00:42:36 +0400
committerJosef Bacik <jbacik@fusionio.com>2013-06-14 19:30:13 +0400
commite78417d1921c538ea195537c7bea1b31a6a55961 (patch)
treee588950c7b2af3d686fdc7fb34dc704e4e66c170 /fs/btrfs
parenta5959bc0a1920d54c07b26a67b104caaf28f0a8c (diff)
downloadlinux-e78417d1921c538ea195537c7bea1b31a6a55961.tar.xz
Btrfs: do not pin while under spin lock
When testing a corrupted fs I noticed I was getting sleep while atomic errors when the transaction aborted. This is because btrfs_pin_extent may need to allocate memory and we are calling this under the spin lock. Fix this by moving it out and doing the pin after dropping the spin lock but before dropping the mutex, the same way it works when delayed refs run normally. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/disk-io.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 9b7020197c71..3c2886ca7d8c 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3762,6 +3762,7 @@ int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
while ((node = rb_first(&delayed_refs->root)) != NULL) {
struct btrfs_delayed_ref_head *head = NULL;
+ bool pin_bytes = false;
ref = rb_entry(node, struct btrfs_delayed_ref_node, rb_node);
atomic_set(&ref->refs, 1);
@@ -3782,8 +3783,7 @@ int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
}
if (head->must_insert_reserved)
- btrfs_pin_extent(root, ref->bytenr,
- ref->num_bytes, 1);
+ pin_bytes = true;
btrfs_free_delayed_extent_op(head->extent_op);
delayed_refs->num_heads--;
if (list_empty(&head->cluster))
@@ -3794,9 +3794,13 @@ int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
ref->in_tree = 0;
rb_erase(&ref->rb_node, &delayed_refs->root);
delayed_refs->num_entries--;
- if (head)
- mutex_unlock(&head->mutex);
spin_unlock(&delayed_refs->lock);
+ if (head) {
+ if (pin_bytes)
+ btrfs_pin_extent(root, ref->bytenr,
+ ref->num_bytes, 1);
+ mutex_unlock(&head->mutex);
+ }
btrfs_put_delayed_ref(ref);
cond_resched();