From e7ae5f86dba7383ad951dbb4afc5f320e74e40cf Mon Sep 17 00:00:00 2001
From: Enjeck Cleopatra <32180937+PROTechThor@users.noreply.github.com>
Date: Mon, 19 Oct 2020 15:11:38 +0100
Subject: [PATCH] Add info about larger swiotlb value

---
 user/troubleshooting/pci-troubleshooting.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/user/troubleshooting/pci-troubleshooting.md b/user/troubleshooting/pci-troubleshooting.md
index 38cfd153..7fc87a6d 100644
--- a/user/troubleshooting/pci-troubleshooting.md
+++ b/user/troubleshooting/pci-troubleshooting.md
@@ -18,6 +18,8 @@ To change this allocation, edit VM's kernel parameters (this is expressed in 512
     kernelopts       : iommu=soft swiotlb=2048 (default)
     # qvm-prefs -s netvm kernelopts "iommu=soft swiotlb=8192"
 
+The `8192` value is the default value and some devices may require a larger value (like `16384`).
+
 ## PCI Passthrough Issues ##
 
 Sometimes the PCI arbitrator is too strict, which may cause errors such as `Unable to reset PCI device` and other PCI-related errors.