Module Name: src
Committed By: hannken
Date: Mon Nov 6 12:17:50 UTC 2023
Modified Files:
src/sys/kern: vfs_vnode.c
Log Message:
As the number of allocated vnodes goes beyond 106% of desiredvnodes
start throttling threads allocating new vnodes at a rate of ~100 new
vnodes per second and thread.
To generate a diff of this commit:
cvs rdiff -u -r1.149 -r1.150 src/sys/kern/vfs_vnode.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/kern/vfs_vnode.c
diff -u src/sys/kern/vfs_vnode.c:1.149 src/sys/kern/vfs_vnode.c:1.150
--- src/sys/kern/vfs_vnode.c:1.149 Fri Feb 24 11:02:27 2023
+++ src/sys/kern/vfs_vnode.c Mon Nov 6 12:17:50 2023
@@ -1,4 +1,4 @@
-/* $NetBSD: vfs_vnode.c,v 1.149 2023/02/24 11:02:27 riastradh Exp $ */
+/* $NetBSD: vfs_vnode.c,v 1.150 2023/11/06 12:17:50 hannken Exp $ */
/*-
* Copyright (c) 1997-2011, 2019, 2020 The NetBSD Foundation, Inc.
@@ -148,7 +148,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vfs_vnode.c,v 1.149 2023/02/24 11:02:27 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vfs_vnode.c,v 1.150 2023/11/06 12:17:50 hannken Exp $");
#ifdef _KERNEL_OPT
#include "opt_pax.h"
@@ -539,6 +539,8 @@ lru_requeue(vnode_t *vp, vnodelst_t *lis
if ((d > 0 && numvnodes > desiredvnodes) ||
listhd == &lru_list[LRU_VRELE])
cv_signal(&vdrain_cv);
+ if (d > 0 && numvnodes > desiredvnodes + desiredvnodes / 16)
+ kpause("vnfull", false, mstohz(10), &vdrain_lock);
mutex_exit(&vdrain_lock);
}
@@ -689,7 +691,7 @@ vdrain_thread(void *cookie)
for (;;) {
vdrain_retry = false;
- target = desiredvnodes - desiredvnodes/10;
+ target = desiredvnodes - desiredvnodes / 16;
for (i = 0; i < LRU_COUNT; i++) {
TAILQ_INSERT_HEAD(&lru_list[i], marker, vi_lrulist);
