D50130.id155515.diff
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D50130.id155515.diff
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	diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
	--- a/sys/kern/vfs_subr.c
	+++ b/sys/kern/vfs_subr.c
	@@ -757,15 +757,15 @@
	int cpu, physvnodes, virtvnodes;

	/*
	- * Desiredvnodes is a function of the physical memory size and the
	- * kernel's heap size. Generally speaking, it scales with the
	- * physical memory size. The ratio of desiredvnodes to the physical
	- * memory size is 1:16 until desiredvnodes exceeds 98,304.
	- * Thereafter, the
	- * marginal ratio of desiredvnodes to the physical memory size is
	- * 1:64. However, desiredvnodes is limited by the kernel's heap
	- * size. The memory required by desiredvnodes vnodes and vm objects
	- * must not exceed 1/10th of the kernel's heap size.
	+ * 'desiredvnodes' is the minimum of a function of the physical memory
	+ * size and another of the kernel heap size (UMA limit, a portion of the
	+ * KVA).
	+ *
	+ * Currently, on 64-bit platforms, 'desiredvnodes' is set to
	+ * 'virtvnodes' up to a physical memory cutoff of ~1674MB, after which
	+ * 'physvnodes' applies instead. With the current automatic tuning for
	+ * 'maxfiles' (32 files/MB), 'desiredvnodes' becomes smaller than it at
	+ * ~5136MB.
	*/
	physvnodes = maxproc + pgtok(vm_cnt.v_page_count) / 64 +
	3 * min(98304 * 16, pgtok(vm_cnt.v_page_count)) / 64;