trim entries leaked?

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Hi fio group,

I'm trying to get a workload doing concurrent writes, verifies, and/or
trims. I've narrowed down my job file to this:

[verify]
ioengine=psync
direct=1
size=5g
bs=4k
rw=randwrite
numjobs=1
iodepth=1
verify=crc32c
verify_backlog=1
trim_percentage=50
trim_backlog=1
filename=/dev/nvme0n1

With this job writes are read/verified but there are no trims. If I
set backlogs to 0 I get this message before the verification phase:

fio: 654981 trim entries leaked?

I'm using the latest fio as of today, fio-3.35-134-g6f9c.



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