The branch main has been updated by mjg:
URL:
https://cgit.FreeBSD.org/src/commit/?id=8733bc277a383cf59f38a83956f4f523869cfc90
commit 8733bc277a383cf59f38a83956f4f523869cfc90
Author: Mateusz Guzik <m...@freebsd.org>
AuthorDate: 2023-09-14 16:13:01 +0000
Commit: Mateusz Guzik <m...@freebsd.org>
CommitDate: 2023-10-10 12:49:04 +0000
vfs: don't provoke recycling non-free vnodes without a good reason
If the total number of free vnodes is at or above target, there is no
point creating more of them.
Tested by: pho (in a bigger patch)
---
sys/kern/vfs_subr.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index 0251525a50c7..e37f8697efa2 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -1802,11 +1802,19 @@ vn_alloc_hard(struct mount *mp)
mtx_unlock(&vnode_list_mtx);
goto alloc;
}
- rfreevnodes = vnlru_read_freevnodes();
- if (vn_alloc_cyclecount++ >= rfreevnodes) {
- vn_alloc_cyclecount = 0;
- vstir = true;
+
+ if (vn_alloc_cyclecount != 0) {
+ rfreevnodes = vnlru_read_freevnodes();
+ if (rfreevnodes < wantfreevnodes) {
+ if (vn_alloc_cyclecount++ >= rfreevnodes) {
+ vn_alloc_cyclecount = 0;
+ vstir = true;
+ }
+ } else {
+ vn_alloc_cyclecount = 0;
+ }
}
+
/*
* Grow the vnode cache if it will not be above its target max
* after growing. Otherwise, if the free list is nonempty, try
