SSV-24185: Fix the number of zvol I/O threads to align with 50% of the maximum available logical CPUs. #98
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If zvol_io_threads set to '0', then the default zvol io threads will be 50% of number of logical processors.
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arun-kv
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datacore-rbassett
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Oct 31, 2024
These tests are not executed for our commits. We have our own test running in a Jenkin portal Here is the link http://10.200.2.48:8080/job/OpenZFS-Test-Suite/118/ |
hrudaya21
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Nov 4, 2024
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SSV-24185
Issue: CPU stuck at 100% is related to ZFS when we use dedup & comp, never able to reproduce the issue with Compression only enable.
Fix: The number of zvol I/O threads to align with 50% of the maximum available logical CPUs if the 'zvol_io_threads' value in 'Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ZFSin' is not specified. If the 'zvol_io_threads' value is provided, use this value for creating the zvol task queue thread pool.
Use kstat.exe zfs:0:tunable to check the current value of zvol_io_threads. This can be set only by updating the registry, and also require a reboot.