From 0cef9718325d0d9807ac173310b0282a8d297a1f Mon Sep 17 00:00:00 2001
From: Anis Elleuch <vadmeste@gmail.com>
Date: Wed, 7 Dec 2016 01:09:26 +0100
Subject: [PATCH] Fix max cache size calculation when system RAM is inferior to
 the default cache size (#3410)

---
 cmd/server-rlimit-nix.go | 2 +-
 pkg/objcache/objcache.go | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/cmd/server-rlimit-nix.go b/cmd/server-rlimit-nix.go
index 687d41e4b..ff8bf1c65 100644
--- a/cmd/server-rlimit-nix.go
+++ b/cmd/server-rlimit-nix.go
@@ -77,7 +77,7 @@ func setMaxMemory() error {
 		return err
 	}
 	if err == nil && stats.TotalRAM < globalMaxCacheSize {
-		globalMaxCacheSize = (80 / 100) * stats.TotalRAM
+		globalMaxCacheSize = uint64(float64(80*stats.TotalRAM) / 100)
 	}
 	return nil
 }
diff --git a/pkg/objcache/objcache.go b/pkg/objcache/objcache.go
index 4e266d02a..11cf3cc88 100644
--- a/pkg/objcache/objcache.go
+++ b/pkg/objcache/objcache.go
@@ -73,6 +73,9 @@ type Cache struct {
 // the items in the cache never expire (by default), and must be deleted
 // manually.
 func New(maxSize uint64, expiry time.Duration) *Cache {
+	if maxSize == 0 {
+		panic("objcache: setting maximum cache size to zero is forbidden.")
+	}
 	C := &Cache{
 		maxSize: maxSize,
 		entries: make(map[string]*buffer),