On Tue, 31 Oct 2017 14:20:38 +0800 alex chen <alex.c...@huawei.com> wrote:
> we should wait dio requests to finish before inode lock in > ocfs2_setattr(), otherwise the following deadlock will be happened: > process 1 process 2 process 3 > truncate file 'A' end_io of writing file 'A' receiving the bast > messages > ocfs2_setattr > ocfs2_inode_lock_tracker > ocfs2_inode_lock_full > inode_dio_wait > __inode_dio_wait > -->waiting for all dio > requests finish > dlm_proxy_ast_handler > dlm_do_local_bast > ocfs2_blocking_ast > > ocfs2_generic_handle_bast > set > OCFS2_LOCK_BLOCKED flag > dio_end_io > dio_bio_end_aio > dio_complete > ocfs2_dio_end_io > ocfs2_dio_end_io_write > ocfs2_inode_lock > __ocfs2_cluster_lock > ocfs2_wait_for_mask > -->waiting for OCFS2_LOCK_BLOCKED > flag to be cleared, that is waiting > for 'process 1' unlocking the inode lock > inode_dio_end > -->here dec the i_dio_count, but will never > be called, so a deadlock happened. > This sounds like something which should be backported into -stable kernels. Do you agree? _______________________________________________ Ocfs2-devel mailing list Ocfs2-devel@oss.oracle.com https://oss.oracle.com/mailman/listinfo/ocfs2-devel
