document the recent change to debug.witness.*
fix spelling of debug.witness.kdb MFC after: 5 days
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=134874
5
UPDATING
5
UPDATING
@ -23,6 +23,11 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 6.x IS SLOW:
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developers choose to disable these features on build machines
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to maximize performance.
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20040906:
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debug.witness_* has been renamed to debug.witness.*. There are
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compatibility tunables left in for a few days. Update loader.conf
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as necessary.
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20040902:
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The ifi_epoch change has been reverted because the ABI breakage
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was too extensive. If you are running with a kernel/userland
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@ -68,9 +68,9 @@ specified, then the flag will default to on.
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It can also be set from the
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.Xr loader 8
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via the
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.Va debug.witness_ddb
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.Va debug.witness.kdb
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environment variable or after the kernel has booted via the
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.Va debug.witness_ddb
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.Va debug.witness.kdb
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sysctl.
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If the flag is set to zero, then the debugger will not be entered.
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If the flag is non-zero, then the debugger will be entered.
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@ -85,11 +85,11 @@ kernel option.
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The flag can also be set via the
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.Xr loader 8
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environment variable
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.Va debug.witness_skipspin .
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.Va debug.witness.skipspin .
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If the variable is set to a non-zero value, then spin mutexes are skipped.
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Once the kernel has booted, the status of this flag can be examined but not
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set via the read-only sysctl
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.Va debug.witness_skipspin .
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.Va debug.witness.skipspin .
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.Pp
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The
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.Nm
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