Re: [PATCH v4 2/3] scsi: storvsc: Use vmbus_requestor to generate transaction IDs for VMBus hardening

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On Wed, Jul 08, 2020 at 09:21:05AM +0000, Wei Liu wrote:
[...]
> > If I revert this commit, everything works fine:
> > 
> > PS C:\Users\natec> wsl --shutdown
> > PS C:\Users\natec> wsl -d ubuntu -- /bin/bash
> > nathan@Ryzen-9-3900X:/mnt/c/Users/natec$ cat /proc/version
> > Linux version 5.8.0-rc4-next-20200707-microsoft-standard+ (nathan@Ryzen-9-3900X) (gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #1 SMP Tue Jul 7 16:35:06 MST 2020
> > nathan@Ryzen-9-3900X:/mnt/c/Users/natec$ git -C ~/src/linux-next lo -2
> > 0ff017dff922 (HEAD -> master) Revert "scsi: storvsc: Use vmbus_requestor to generate transaction IDs for VMBus hardening"
> > 5b2a702f85b3 (tag: next-20200707, origin/master, origin/HEAD) Add linux-next specific files for 20200707
> > nathan@Ryzen-9-3900X:/mnt/c/Users/natec$
> > 
> > The kernel was built using the following commands:
> > 
> > $ mkdir -p out/x86_64
> > 
> > $ curl -LSso out/x86_64/.config https://github.com/microsoft/WSL2-Linux-Kernel/raw/linux-msft-wsl-4.19.y/Microsoft/config-wsl
> > 
> > $ scripts/config --file out/x86_64/.config -d RAID6_PQ_BENCHMARK -e NET_9P_VIRTIO
> > 
> > $ make -skj"$(nproc)" O=out/x86_64 olddefconfig bzImage
> > 
> > I don't really know how to get more information than this as WSL seems
> > rather opaque but I am happy to provide any information.
> 
> Linux kernel uses Hyper-V's crash reporting facility to spit out
> information when it dies. It is said that you can see that information
> in the "Event Viewer" program.
> 
> (I've never tried this though -- not using WSL2)
> 

If this doesn't work, another idea is to install a traditional VM on
Hyper-V and replace the kernel with your own.

With such setup, you should be able to add an emulated serial port to
the VM and grab more information.

Wei.



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