[Bug 290205] ZFS: file stuck in delete queue

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 13 Sep 2026 09:56:18 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290205

--- Comment #3 from Tobias Bengtsson <me@tobiasbengtsson.se> ---
I've ruled out the explanation that non-deleted files are hidden by other
overlay mounts by inspecting a snapshot (now deleted so that I don't have any
snapshots left). In fact, I could find the files in the delete queue.

# zdb -dddd nucroot/ROOT/default 1 | grep DELETE
                DELETE_QUEUE = 33

# zdb -dddd nucroot/ROOT/default 33 | grep entries
        microzap: 8704 bytes, 63 entries

It's been stuck at 63 entries for many days across reboots (over SSH,
unfortunately it's a distant server so my toolbox is limited)

Among the 63 files listed, two are particularly large:

# zdb -dddd nucroot/ROOT/default 33 | awk '/\t\t/ {print $3}' > /tmp/deleteq
# cat /tmp/deleteq | xargs zdb -dddd nucroot/ROOT/default | awk '/size\t/'
        size    177064
        size    37912
        size    1235264
        size    128008
        size    16400
        size    490616
        size    1957960
        size    1291304
        size    694464
        size    119808
        size    236656
        size    20782346636
        size    1235216
        size    52816
        size    1010960
        size    135488
        size    37568
        size    47808
        size    6323456
        size    199656
        size    267016
        size    237584
        size    19289505820
        size    105232
        size    1235120
        size    9728
        size    9888
        size    1287312
        size    993768
        size    16208
        size    127696
        size    106416
        size    23600
        size    82240
        size    1316176
        size    1291144
        size    25440
        size    64288
        size    833272
        size    52552
        size    1221056
        size    117784
        size    82408
        size    499512
        size    64008
        size    1235304
        size    88360
        size    1049120
        size    804704
        size    57080
        size    4629672
        size    4632048
        size    692664
        size    199304
        size    1957616
        size    70872
        size    57672
        size    1957880
        size    47944
        size    2061440
        size    133192
        size    94600
        size    1245488

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