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    SubjectRe: [PATCH v27 00/10] NTFS read-write driver GPL implementation by Paragon Software
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    Date
    > Konstantin, I would *strongly* encourage you to try running fstests,
    > about 60 seconds into a run, we discover that generic/013 will trigger
    > locking problems that could lead to deadlocks.

    Seems like it's a real issue. I was using new HDD and ntfs3-dkms (v26)
    in Arch and faced locking while was doing rsync:

    [ 5529.507567] INFO: task kworker/0:1:18 blocked for more than 1105 seconds.
    [ 5529.507580] Tainted: P OE 5.13.4-arch1-1 #1
    [ 5529.507584] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
    disables this message.
    [ 5529.507586] task:kworker/0:1 state:D stack: 0 pid: 18 ppid:
    2 flags:0x00004000
    [ 5529.507598] Workqueue: usb_hub_wq hub_event
    [ 5529.507612] Call Trace:
    [ 5529.507615] ? out_of_line_wait_on_bit_lock+0xb0/0xb0
    [ 5529.507631] __schedule+0x310/0x930
    [ 5529.507641] ? out_of_line_wait_on_bit_lock+0xb0/0xb0
    [ 5529.507648] schedule+0x5b/0xc0
    [ 5529.507654] bit_wait+0xd/0x60
    [ 5529.507661] __wait_on_bit+0x2a/0x90
    [ 5529.507669] __inode_wait_for_writeback+0xb0/0xe0
    [ 5529.507680] ? var_wake_function+0x20/0x20
    [ 5529.507689] writeback_single_inode+0x64/0x140
    [ 5529.507699] sync_inode_metadata+0x3d/0x60
    [ 5529.507712] ntfs_set_state+0x126/0x1a0 [ntfs3]
    [ 5529.507738] ni_write_inode+0x244/0xef0 [ntfs3]
    [ 5529.507764] ? pagevec_lookup_range_tag+0x24/0x30
    [ 5529.507772] ? __filemap_fdatawait_range+0x6f/0xf0
    [ 5529.507785] __writeback_single_inode+0x260/0x310
    [ 5529.507795] writeback_single_inode+0xa7/0x140
    [ 5529.507803] sync_inode_metadata+0x3d/0x60
    [ 5529.507814] ntfs_set_state+0x126/0x1a0 [ntfs3]
    [ 5529.507834] ntfs_sync_fs+0xf9/0x100 [ntfs3]
    [ 5529.507857] sync_filesystem+0x40/0x90
    [ 5529.507868] fsync_bdev+0x21/0x60
    [ 5529.507874] delete_partition+0x13/0x80
    [ 5529.507882] blk_drop_partitions+0x5b/0xa0
    [ 5529.507889] del_gendisk+0xa5/0x220
    [ 5529.507895] sd_remove+0x3d/0x80
    [ 5529.507907] __device_release_driver+0x17a/0x230
    [ 5529.507918] device_release_driver+0x24/0x30
    [ 5529.507927] bus_remove_device+0xdb/0x140
    [ 5529.507937] device_del+0x18b/0x400
    [ 5529.507943] ? ata_tlink_match+0x30/0x30
    [ 5529.507949] ? attribute_container_device_trigger+0xc5/0x100
    [ 5529.507959] __scsi_remove_device+0x118/0x150
    [ 5529.507967] scsi_forget_host+0x54/0x60
    [ 5529.507978] scsi_remove_host+0x72/0x110
    [ 5529.507988] usb_stor_disconnect+0x46/0xb0 [usb_storage]
    [ 5529.508003] usb_unbind_interface+0x8a/0x270
    [ 5529.508010] ? kernfs_find_ns+0x35/0xd0
    [ 5529.508017] __device_release_driver+0x17a/0x230
    [ 5529.508027] device_release_driver+0x24/0x30
    [ 5529.508036] bus_remove_device+0xdb/0x140
    [ 5529.508044] device_del+0x18b/0x400
    [ 5529.508050] ? kobject_put+0x98/0x1d0
    [ 5529.508062] usb_disable_device+0xc6/0x1f0
    [ 5529.508073] usb_disconnect.cold+0x7e/0x250
    [ 5529.508085] hub_event+0xc7b/0x17f0
    [ 5529.508099] process_one_work+0x1e3/0x3b0
    [ 5529.508109] worker_thread+0x50/0x3b0
    [ 5529.508115] ? process_one_work+0x3b0/0x3b0
    [ 5529.508122] kthread+0x133/0x160
    [ 5529.508127] ? set_kthread_struct+0x40/0x40
    [ 5529.508133] ret_from_fork+0x22/0x30

    [ 8440.627659] blk_update_request: I/O error, dev sdd, sector 256017240
    op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
    [ 8440.627667] ntfs3: 165 callbacks suppressed
    [ 8440.627667] ntfs3: sdd1: failed to read volume at offset 0x1e84f6b000
    [ 8440.627673] blk_update_request: I/O error, dev sdd, sector 256017240
    op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
    [ 8440.627676] ntfs3: sdd1: failed to read volume at offset 0x1e84f6b000
    [ 8440.778355] blk_update_request: I/O error, dev sdd, sector 6293496 op
    0x0:(READ) flags 0x0 phys_seg 1 prio class 0
    [ 8440.778384] ntfs3: sdd1: failed to read volume at offset 0xbffff000
    [ 8440.778412] blk_update_request: I/O error, dev sdd, sector 6353096 op
    0x0:(READ) flags 0x0 phys_seg 1 prio class 0
    [ 8440.778428] ntfs3: sdd1: failed to read volume at offset 0xc1d19000
    [ 8440.778441] blk_update_request: I/O error, dev sdd, sector 6353096 op
    0x0:(READ) flags 0x0 phys_seg 1 prio class 0
    [ 8440.778452] ntfs3: sdd1: failed to read volume at offset 0xc1d19000
    [ 8440.778459] ntfs3: sdd1: ntfs_evict_inode r=0 failed, -22.

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