Closed
Description
System information
| Type | Version/Name |
|---|---|
| Distribution Name | Rocky Linux |
| Distribution Version | 9.5 |
| Kernel Version | 5.14.0-503.16.1.el9_5.x86_64 |
| Architecture | x86_64 |
| OpenZFS Version | 2.2.7-1 |
Describe the problem you're observing
arc_summary shows negative value for MFU data target:
ARC size (current): 99.5 % 15.3 GiB
Target size (adaptive): 100.0 % 15.4 GiB
Min size (hard limit): 6.2 % 984.0 MiB
Max size (high water): 16:1 15.4 GiB
Anonymous data size: 0.0 % 0 Bytes
Anonymous metadata size: < 0.1 % 768.0 KiB
MFU data target: -77.6 % -10898862366 Bytes
MFU data size: 0.2 % 30.5 MiB
Poking inside arc_summary itself, I can see the following lines:
Lines 626 to 627 in 7be9fa2
As on this machine pd is currently equal to 20883106811, v becomes negative.
Describe how to reproduce the problem
Not sure. It seems related to prefetch, but what does ARC states balance, related to the fixed-point arithmetic. From my understanding, s means in this context?pd or pm should never be bigger than 4294967296
Include any warning/errors/backtraces from the system logs
None.