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Differential D14422

Use UMA_ZONE_NODUMP for the DMAR map entry zone
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Authored by markj on Feb 18 2018, 1:16 AM.
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kib
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rS329521: Don't include DMAR map entry zone items in kernel dumps.
Summary

We may attempt to allocate from this zone while dumping to a device. I
noted that dmar_pgalloc() already uses the NODUMP flag, so it seemed
reasonable to extend this approach to the problem. If it is desirable to
retain the zone items in a dump, some more complicated solutions are
possible.

Test Plan

mmacy reported the problem and tested this change.

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rS FreeBSD src repository - subversion
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Event Timeline

markj created this revision.Feb 18 2018, 1:16 AM
Harbormaster completed remote builds in B15127: Diff 39456.Feb 18 2018, 1:16 AM
markj edited the summary of this revision. (Show Details)Feb 18 2018, 1:19 AM
markj edited the test plan for this revision. (Show Details)
markj added a reviewer: kib.
kbowling added a subscriber: kbowling.Feb 18 2018, 7:28 AM
kib accepted this revision.Feb 18 2018, 10:40 AM
This revision is now accepted and ready to land.Feb 18 2018, 10:40 AM
Closed by commit rS329521: Don't include DMAR map entry zone items in kernel dumps. (authored by markj). · Explain WhyFeb 18 2018, 4:04 PM
This revision was automatically updated to reflect the committed changes.
Herald added a subscriber: imp. · View Herald TranscriptFeb 18 2018, 4:04 PM

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head/
sys/
x86/
iommu/
2 lines

Diff 39469

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head/sys/x86/iommu/intel_gas.c

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