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Differential D58766

vm_object: Augment an assertion in vm_object_split()
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Authored by markj on Aug 10 2026, 5:47 PM.
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alc
kib
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rG1b4e0a4467f9: vm_object: Augment an assertion in vm_object_split()
rG12857d8f4269: vm_object: Augment an assertion in vm_object_split()
Summary

In some private discussion it was pointed out that vm_object_split()'s
pattern of dropping the source object lock looks dangerous in that the
initial assumption that OBJ_ONEMAPPING is set may become false. In
practice I believe that the map lock holds this flag stable, but let's
assert that.

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rG FreeBSD src repository
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Buildable 75496
Build 72379: arc lint + arc unit

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sys/
vm/
5 lines

Diff 183813

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sys/vm/vm_object.c

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