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Differential D25327

Fix a double unlock in vm_object_backing_collapse_wait().
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Authored by markj on Jun 17 2020, 6:30 PM.
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imp

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jeff
alc
kib
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rS362360: Fix a double object unlock in vm_object_backing_collapse_wait().
Summary

vm_object_pip_sleep() will release the lock, I believe. I noticed this
by code inspection, so I'm not certain that this code is reachable.

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Buildable 31779
Build 29341: arc lint + arc unit

Event Timeline

markj requested review of this revision.Jun 17 2020, 6:30 PM
markj created this revision.
markj added reviewers: jeff, alc, kib.Jun 17 2020, 6:42 PM
Harbormaster completed remote builds in B31779: Diff 73231.Jun 18 2020, 9:20 AM
kib accepted this revision.Jun 18 2020, 11:44 PM

It should be very hard to provoke this situation, but I believe it is real.

This revision is now accepted and ready to land.Jun 18 2020, 11:44 PM
Closed by commit rS362360: Fix a double object unlock in vm_object_backing_collapse_wait(). (authored by markj). · Explain WhyJun 19 2020, 3:32 AM
This revision was automatically updated to reflect the committed changes.
markj added a commit: rS362360: Fix a double object unlock in vm_object_backing_collapse_wait()..
Herald added a subscriber: imp. · View Herald TranscriptJun 19 2020, 3:32 AM

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sys/
vm/
1 line

Diff 73231

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sys/vm/vm_object.c

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