On Wed, Jul 30, 2014 at 11:52:29AM +0200, Jan Kara wrote:
> I see the problem now. How about an attached patch? Do you see other
> lockdep warnings with it?
Hit another one :-( Same inversion between i_mmap_mutex and jbd2_handle:
-> #1 (&mapping->i_mmap_mutex){+.+...}:
[<ffffffff810cfa12>] lock_acquire+0xb2/0x1f0
[<ffffffff815cb5e5>] mutex_lock_nested+0x75/0x420
[<ffffffff811bc0ff>] rmap_walk+0x6f/0x390
[<ffffffff811bc5a9>] page_mkclean+0x69/0x90
[<ffffffff81189c10>] clear_page_dirty_for_io+0x60/0x120
[<ffffffffa01d1017>] mpage_submit_page+0x47/0x80 [ext4]
[<ffffffffa01d1160>] mpage_process_page_bufs+0x110/0x120 [ext4]
[<ffffffffa01d16f0>] mpage_prepare_extent_to_map+0x1f0/0x2f0 [ext4]
[<ffffffffa01d6e57>] ext4_writepages+0x427/0x1060 [ext4]
[<ffffffff8118c211>] do_writepages+0x21/0x40
[<ffffffff8117e909>] __filemap_fdatawrite_range+0x59/0x60
[<ffffffff8117ea0d>] filemap_write_and_wait_range+0x2d/0x70
[<ffffffffa01cd7d8>] ext4_sync_file+0x118/0x490 [ext4]
[<ffffffff8122dd2b>] vfs_fsync_range+0x1b/0x30
[<ffffffff811b99ad>] SyS_msync+0x1ed/0x250
(ext4_writepages starts a transaction before calling
mpage_prepare_extent_to_map)
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