[Bug 277389] Reproduceable low memory freeze on 14.0-RELEASE-p5

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=277389

--- Comment #1 from pascal.guitierrez@gmail.com ---
here is the output from top at the point of the freeze:

last pid: 98721;  load averages:  2.43,  1.34,  0.55                           
                                     up 0+00:04:36  20:32:41
290 processes: 1 running, 289 sleeping
CPU:  0.2% user,  0.0% nice,  5.3% system,  0.0% interrupt, 94.5% idle
Mem: 1936K Active, 4096B Inact, 132K Laundry, 15G Wired, 87M Free
ARC: 14G Total, 999M MFU, 13G MRU, 384K Anon, 34M Header, 2609K Other
     14G Compressed, 14G Uncompressed, 1.01:1 Ratio


even when reducing vfs.zfs.arc_max=1073741824

the ARC MRU grows way beyond this limit and eventually freezes the system:

last pid: 41150;  load averages:  0.27,  2.72,  2.07                           
                                     up 0+00:10:15  22:38:06
545 processes: 1 running, 544 sleeping
CPU:  0.0% user,  0.0% nice,  6.8% system,  0.2% interrupt, 93.0% idle
Mem: 3316K Active, 572K Inact, 288K Laundry, 15G Wired, 87M Free
ARC: 14G Total, 138M MFU, 14G MRU, 38M Header, 2184K Other
     14G Compressed, 14G Uncompressed, 1.01:1 Ratio

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