Troubleshooting guide. Just one thing but it's something

troubleshoot.md

@@ -0,0 +1,16 @@
+# Troubleshooting
+
+## QEMU can not allocate memory
+
+```
+qemu-system-x86_64: VFIO_MAP_DMA: -12                                       
+qemu-system-x86_64: vfio_dma_map(0x7fae44695a00, 0xc0000000, 0x40000, 0x7fab29e00000) = -12 (Cannot allocate memory)
+qemu: hardware error: vfio: DMA mapping failed, unable to continue
+```
+
+Solution:
+```
+ulimit -l $(( $(echo $RAM | tr -d 'G')*1048576+10 ))
+```
+
+Note: This is already addressed in the `windows.sh` script.