From c0a9e92eeaf53c53ca806f0ffa75a75c8a912e48 Mon Sep 17 00:00:00 2001
From: Benny Baumann <BenBE@geshi.org>
Date: Sun, 29 May 2022 21:10:26 +0200
Subject: Implement FreeBSD support for minimum ZFS ARC size

---
 freebsd/Platform.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'freebsd')

diff --git a/freebsd/Platform.c b/freebsd/Platform.c
index d21fc807..1a731b71 100644
--- a/freebsd/Platform.c
+++ b/freebsd/Platform.c
@@ -227,6 +227,7 @@ double Platform_setCPUValues(Meter* this, unsigned int cpu) {
 
 void Platform_setMemoryValues(Meter* this) {
    const ProcessList* pl = this->pl;
+   const FreeBSDProcessList* fpl = (const FreeBSDProcessList*) pl;
 
    this->total = pl->totalMem;
    this->values[0] = pl->usedMem;
@@ -234,6 +235,16 @@ void Platform_setMemoryValues(Meter* this) {
    // this->values[2] = "shared memory, like tmpfs and shm"
    this->values[3] = pl->cachedMem;
    // this->values[4] = "available memory"
+
+   if (fpl->zfs.enabled) {
+      // ZFS does not shrink below the value of zfs_arc_min.
+      unsigned long long int shrinkableSize = 0;
+      if (fpl->zfs.size > fpl->zfs.min)
+         shrinkableSize = fpl->zfs.size - fpl->zfs.min;
+      this->values[0] -= shrinkableSize;
+      this->values[3] += shrinkableSize;
+      // this->values[4] += shrinkableSize;
+   }
 }
 
 void Platform_setSwapValues(Meter* this) {
-- 
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