From dcc4adfcd76753c9bf567ed1b6fc352f898638e7 Mon Sep 17 00:00:00 2001
From: Guillaume Ballet <gballet@gmail.com>
Date: Fri, 5 Jul 2019 12:13:21 +0200
Subject: [PATCH] cmd/geth: wrong memory size sanitizing on OpenBSD (#19793)

---
 cmd/geth/main.go   | 15 ++++++++++-----
 trie/sync_bloom.go |  2 +-
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/cmd/geth/main.go b/cmd/geth/main.go
index 414900b45..fd8f29421 100644
--- a/cmd/geth/main.go
+++ b/cmd/geth/main.go
@@ -21,6 +21,7 @@ import (
 	"fmt"
 	"math"
 	"os"
+	"runtime"
 	godebug "runtime/debug"
 	"sort"
 	"strconv"
@@ -256,11 +257,15 @@ func init() {
 		}
 		// Cap the cache allowance and tune the garbage collector
 		var mem gosigar.Mem
-		if err := mem.Get(); err == nil {
-			allowance := int(mem.Total / 1024 / 1024 / 3)
-			if cache := ctx.GlobalInt(utils.CacheFlag.Name); cache > allowance {
-				log.Warn("Sanitizing cache to Go's GC limits", "provided", cache, "updated", allowance)
-				ctx.GlobalSet(utils.CacheFlag.Name, strconv.Itoa(allowance))
+		// Workaround until OpenBSD support lands into gosigar
+		// Check https://github.com/elastic/gosigar#supported-platforms
+		if runtime.GOOS != "openbsd" {
+			if err := mem.Get(); err == nil {
+				allowance := int(mem.Total / 1024 / 1024 / 3)
+				if cache := ctx.GlobalInt(utils.CacheFlag.Name); cache > allowance {
+					log.Warn("Sanitizing cache to Go's GC limits", "provided", cache, "updated", allowance)
+					ctx.GlobalSet(utils.CacheFlag.Name, strconv.Itoa(allowance))
+				}
 			}
 		}
 		// Ensure Go's GC ignores the database cache for trigger percentage
diff --git a/trie/sync_bloom.go b/trie/sync_bloom.go
index 7b5b7488a..2182d1c43 100644
--- a/trie/sync_bloom.go
+++ b/trie/sync_bloom.go
@@ -70,7 +70,7 @@ func NewSyncBloom(memory uint64, database ethdb.Iteratee) *SyncBloom {
 	// Create the bloom filter to track known trie nodes
 	bloom, err := bloomfilter.New(memory*1024*1024*8, 3)
 	if err != nil {
-		panic(fmt.Sprintf("failed to create bloom: %v", err)) // Can't happen, here for sanity
+		panic(fmt.Sprintf("failed to create bloom: %v", err))
 	}
 	log.Info("Allocated fast sync bloom", "size", common.StorageSize(memory*1024*1024))