Differential D58766

vm_object: Augment an assertion in vm_object_split()
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Authored by markj on Mon, Aug 10, 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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Tests Not Applicable

Event Timeline

markj created this revision.Mon, Aug 10, 5:47 PM

Herald added a subscriber: imp. · View Herald TranscriptMon, Aug 10, 5:47 PM

markj requested review of this revision.Mon, Aug 10, 5:47 PM

Harbormaster completed remote builds in B75496: Diff 183813.Mon, Aug 10, 5:47 PM

kib accepted this revision.Mon, Aug 10, 5:58 PM

This revision is now accepted and ready to land.Mon, Aug 10, 5:58 PM

alc accepted this revision.Tue, Aug 11, 8:43 AM

Closed by commit rG12857d8f4269: vm_object: Augment an assertion in vm_object_split() (authored by markj). · Explain WhyTue, Aug 11, 2:24 PM

This revision was automatically updated to reflect the committed changes.

markj added a commit: rG12857d8f4269: vm_object: Augment an assertion in vm_object_split().

markj added a commit: rG1b4e0a4467f9: vm_object: Augment an assertion in vm_object_split().Mon, Aug 24, 4:30 PM

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sys/

vm/

5 lines

Diff 183877

sys/vm/vm_object.c

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