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Index: sys/conf/NOTES
===================================================================
--- sys/conf/NOTES
+++ sys/conf/NOTES
@@ -2842,3 +2842,7 @@
# Kernel support for stats(3).
options STATS
+
+# Try to reduce memory usage. It may come as a tradeoff against performance
+# especially on multicore systems.
+#options COMPACT
Index: sys/conf/options
===================================================================
--- sys/conf/options
+++ sys/conf/options
@@ -1014,3 +1014,6 @@
# gcov support
GCOV opt_global.h
LINDEBUGFS
+
+# Try to reduce memory usage
+COMPACT opt_global.h
Index: sys/sys/systm.h
===================================================================
--- sys/sys/systm.h
+++ sys/sys/systm.h
@@ -154,6 +154,14 @@
} while (0)
#endif /* INVARIANTS || _STANDALONE */
+#ifdef _KERNEL
+#ifndef COMPACT
+#define __aligned_if_not_compact(x) __aligned(x)
+#else
+#define __aligned_if_not_compact(x)
+#endif
+#endif
+
/*
* Helpful macros for quickly coming up with assertions with informative
* panic messages.

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