Hi there,
I've got a strange problem with pci passthrough:
I'm using the newest proxmox ve version 4.1 with a vanilla build kernel 4.4-rc7 (same behavier with the stock kernel 4.2.6). The root system is located on a LSI 9260-8i (LSI2108) Megaraid controller (RAID5) which is working without problems. It is using correctly the "megaraid_sas" module for that controller.
The motherboard (Asus P9D-C, Intel C222 chipsetz) and the cpu (Xeon E3-1231 V3) support VT-d in hardware. The setup is working without problems under vmware esxi 5.5 and 6.0.
When I passthrough a pci-e network card to a vm (Intel i218) there is no problem and everything is working correctly.
But here's the problem:
For the backup vm I want to passthrough the 2nd SAS-controller (LSI2008) for a ZFS setup. After starting the backup vm the host instantly looses its connection to the root fs from the LSI2108 controller. I get i/o errors and can only hard reset the proxmox system.
I tried everything correct:
- with and without "machine q35"
- vfind-bind -script to unbind the LSI2008 controller before starting the backup vm
The problem must belong to the "megaraid_sas" module. Is there any known incompatibility of these two LSI sas controllers with pci passthrough? (Without passthrough they are both working concurrently 100% correctly.) I'm
I'm aware of the kernel bug with pci passthrough since kernel version 4.2. This is why I tried the newest kernel version 4.4-rc7 which should have solved the problem. For my understanding the problem belongs to another subject between the lsi drivers "megaraid_sas" (for Fusion cards LSI2108) and "mpt3sas" (for MPT cards LSI2008). Although i'm blacklisting the mpt3sas driver and pci-stubbing the device id. I have successfully confirmed that afterwoods the mpt3sas driver isn't loaded anymore an the connected drives the the LSI2008 SAS-controller arent' recognized anymore which should be correctly.
Thank you for your help.
Martin
I've got a strange problem with pci passthrough:
I'm using the newest proxmox ve version 4.1 with a vanilla build kernel 4.4-rc7 (same behavier with the stock kernel 4.2.6). The root system is located on a LSI 9260-8i (LSI2108) Megaraid controller (RAID5) which is working without problems. It is using correctly the "megaraid_sas" module for that controller.
The motherboard (Asus P9D-C, Intel C222 chipsetz) and the cpu (Xeon E3-1231 V3) support VT-d in hardware. The setup is working without problems under vmware esxi 5.5 and 6.0.
When I passthrough a pci-e network card to a vm (Intel i218) there is no problem and everything is working correctly.
But here's the problem:
For the backup vm I want to passthrough the 2nd SAS-controller (LSI2008) for a ZFS setup. After starting the backup vm the host instantly looses its connection to the root fs from the LSI2108 controller. I get i/o errors and can only hard reset the proxmox system.
I tried everything correct:
- with and without "machine q35"
- vfind-bind -script to unbind the LSI2008 controller before starting the backup vm
The problem must belong to the "megaraid_sas" module. Is there any known incompatibility of these two LSI sas controllers with pci passthrough? (Without passthrough they are both working concurrently 100% correctly.) I'm
I'm aware of the kernel bug with pci passthrough since kernel version 4.2. This is why I tried the newest kernel version 4.4-rc7 which should have solved the problem. For my understanding the problem belongs to another subject between the lsi drivers "megaraid_sas" (for Fusion cards LSI2108) and "mpt3sas" (for MPT cards LSI2008). Although i'm blacklisting the mpt3sas driver and pci-stubbing the device id. I have successfully confirmed that afterwoods the mpt3sas driver isn't loaded anymore an the connected drives the the LSI2008 SAS-controller arent' recognized anymore which should be correctly.
Thank you for your help.
Martin
