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Commit 9dd14fd6 authored by Edmund Nadolski's avatar Edmund Nadolski Committed by David Sterba
Browse files

btrfs: add cond_resched() calls when resolving backrefs 



Since backref resolution is CPU-intensive, the cond_resched calls
should help alleviate soft lockup occurences.

Signed-off-by: default avatarEdmund Nadolski <enadolski@suse.com>
Signed-off-by: default avatarJeff Mahoney <jeffm@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 00142756

fs/btrfs/backref.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -660,6 +660,7 @@ static int resolve_indirect_refs(struct btrfs_fs_info *fs_info, 
		prelim_ref_insert(fs_info, &preftrees->direct, ref);

		prelim_ref_insert(fs_info, &preftrees->direct, ref);





		ulist_reinit(parents);

		ulist_reinit(parents);

		cond_resched();

	}

	}

out:

out:

	ulist_free(parents);

	ulist_free(parents);
@@ -702,6 +703,7 @@ static int add_missing_keys(struct btrfs_fs_info *fs_info, 
		btrfs_tree_read_unlock(eb);

		btrfs_tree_read_unlock(eb);

		free_extent_buffer(eb);

		free_extent_buffer(eb);

		prelim_ref_insert(fs_info, &preftrees->indirect, ref);

		prelim_ref_insert(fs_info, &preftrees->indirect, ref);

		cond_resched();

	}

	}

	return 0;

	return 0;

}

}
@@ -1243,6 +1245,7 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans, 
			}

			}

			eie = NULL;

			eie = NULL;

		}

		}

		cond_resched();

	}

	}





out:

out: