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Index: sys/kern/vfs_subr.c
===================================================================
--- sys/kern/vfs_subr.c
+++ sys/kern/vfs_subr.c
@@ -322,11 +322,14 @@
* size. The memory required by desiredvnodes vnodes and vm objects
* may not exceed one seventh of the kernel's heap size.
*/
- physvnodes = maxproc + cnt.v_page_count / 16 + 3 * min(98304 * 4,
- cnt.v_page_count) / 16;
- virtvnodes = vm_kmem_size / (7 * (sizeof(struct vm_object) +
- sizeof(struct vnode)));
- desiredvnodes = min(physvnodes, virtvnodes);
+ TUNABLE_INT_FETCH("kern.maxvnodes", &desiredvnodes);
+ if (desiredvnodes == 0) {
+ physvnodes = maxproc + cnt.v_page_count / 16 + 3 *
+ min(98304 * 4, cnt.v_page_count) / 16;
+ virtvnodes = vm_kmem_size / (7 * (sizeof(struct vm_object) +
+ sizeof(struct vnode)));
+ desiredvnodes = min(physvnodes, virtvnodes);
+ }
if (desiredvnodes > MAXVNODES_MAX) {
if (bootverbose)
printf("Reducing kern.maxvnodes %d -> %d\n",

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