Hi Ted, FYI, we noticed that simple dd write can trigger the below BUG in commit 208b9cc3a32f29b8a9bba682b5bfbb962bc9892d ("ext4: add a new spinlock i_raw_lock to protect the ext4's raw inode") [ 20.909408] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null) [ 21.932207] BUG: sleeping function called from invalid context at fs/ext4/ext4_jbd2.c:252 [ 21.933168] in_atomic(): 1, irqs_disabled(): 0, pid: 3280, name: dd [ 21.933709] CPU: 1 PID: 3280 Comm: dd Not tainted 3.14.0-01910-gdeb73c7 #1 [ 21.934278] Hardware name: / , BIOS VVRBLI9J.86A.2891.2007.0511.1144 05/11/2007 [ 21.935205] 0000000000000000 ffff88007de99aa8 ffffffff819b8b88 ffff880038f10000 [ 21.936226] ffff88007de99ab8 ffffffff811030c2 ffff88007de99b18 ffffffff812bba58 [ 21.937231] 000000000000130c ffffffff812b5e7f ffff88007de99b00 ffffffff812d8046 [ 21.938231] Call Trace: [ 21.938627] [<ffffffff819b8b88>] dump_stack+0x4d/0x66 [ 21.939140] [<ffffffff811030c2>] __might_sleep+0x10a/0x10c [ 21.939656] [<ffffffff812bba58>] __ext4_handle_dirty_metadata+0x39/0x1b5 [ 21.940237] [<ffffffff812b5e7f>] ? ext4_ext_tree_init+0x32/0x36 [ 21.940780] [<ffffffff812d8046>] ? jbd2_journal_get_write_access+0x33/0x3c [ 21.941362] [<ffffffff812974e6>] ext4_mark_iloc_dirty+0x577/0x630 [ 21.941915] [<ffffffff812b5e7f>] ? ext4_ext_tree_init+0x32/0x36 [ 21.941916] [<ffffffff812976c7>] ext4_mark_inode_dirty+0xa6/0x1f0 [ 21.941920] [<ffffffff812b5e7f>] ext4_ext_tree_init+0x32/0x36 [ 21.941922] [<ffffffff81292988>] __ext4_new_inode+0xf29/0x10c9 [ 21.941925] [<ffffffff8129f5bb>] ext4_create+0xac/0x156 [ 21.941930] [<ffffffff811e8bdf>] vfs_create+0x68/0xa1 [ 21.941932] [<ffffffff811eaf1b>] do_last.isra.52+0x518/0xa23 [ 21.941933] [<ffffffff811e8db9>] ? link_path_walk+0x69/0x71f [ 21.941935] [<ffffffff811eb64b>] path_openat+0x225/0x591 [ 21.941937] [<ffffffff811ec7f8>] do_filp_open+0x3a/0x7f [ 21.941939] [<ffffffff811f72f5>] ? __alloc_fd+0x5e/0xef [ 21.941942] [<ffffffff811deec2>] do_sys_open+0x147/0x1d6 [ 21.941943] [<ffffffff811f6d7b>] ? __fdget+0x13/0x15 [ 21.941945] [<ffffffff811def6f>] SyS_open+0x1e/0x20 [ 21.941947] [<ffffffff819c7ae9>] system_call_fastpath+0x16/0x1b Thanks, Fengguang _______________________________________________ LKP mailing list LKP(a)linux.intel.com