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Differential D21135

Avoid calling blessed() more often than needed.
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Authored by markj on Aug 2 2019, 3:25 PM.
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F110451434: D21135.diff
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jhb
Commits
rS350540: Only check the blessings table for known LORs.
Summary

Only call it once we've detected a reversal and have set a flag in the
corresponding matrix entries. The badstacks handler now must also omit
stacks corresponding to blessed lock pairs.

Test Plan

Checked that we don't log blessed LORs in badstacks.

Diff Detail

Repository
rS FreeBSD src repository - subversion
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head/
sys/
kern/
19 lines

Diff 60395

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head/sys/kern/subr_witness.c

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