Re: [Qemu-devel] [PATCH v8 00/10] Convert msix_init() to error

[Markus Armbruster <armbru@redhat.com>]

Cao jin <caoj.fnst@cn.fujitsu.com> writes:

> Only a tiny modification in patch "megasas: remove unnecessary
> megasas_use_msix()" to fix a megasas issue.

Please have a look at Michael's review in
Message-ID: <20170112163519-mutt-send-email-mst@kernel.org>

> v8 changelog:
> 1. reorder: place the "megasas: remove unnecessary megasas_use_msix()"
>    as the last one. and fix the bug in it, detailed description in it,
>    also removed the R-b of it.
> 2. Add the Acked-by from Marcel for first 9 patches; add the R-b from Markus
>    to "hcd-xhci: check & correct param before using it".
>
> Test:
> 1. make check ok
> 2. command line test for all affected device, make sure their realization
>    is ok.
> 3. detailed test for megasas, hcd-xhci, vmxnet3.
>    megasas: install a linux distro is ok
>    ./qemu-system-x86_64 --enable-kvm -m 1024
>    -device megasas,id=scsi0,bus=pci.0
>    -drive file=/xx/scsi-disk.img,if=none,id=drive-scsi0
>    -device scsi-disk,bus=scsi0.0,channel=0,scsi-id=4,lun=0,drive=drive-scsi0,id=scsi0-4
>    -cdrom /xx/Fedora-Server-DVD-x86_64-23.iso --monitor stdio
>
>    hcd-xhci: partition the usbstick.img, mkfs, write to file, is ok
>    ./qemu-system-x86_64 -M q35 -m 1024 --enable-kvm
>    -drive if=none,id=usbstick,file=/xx/usbstick.img
>    -device nec-usb-xhci,id=usb,p2=8,p3=8,bus=pcie.0
>    -device usb-storage,bus=usb.0,drive=usbstick --monitor stdio
>    /xx/FedoraWorkStatsion23-x86_64.img
>
>    vmxnet3: ping another destination belongs to host's network is ok.
>    But no migration test, because I don't have a spare machine for now.
>    ./qemu-system-x86_64 -M q35 -m 1024 --enable-kvm
>    -netdev tap,id=mynet0 -device vmxnet3,netdev=mynet0
>    --monitor stdio /home/pino/vm/FedoraWorkStatsion23-x86_64.img

You could migrate to a new QEMU on the same machine.

Or, if you don't want to deal with two instances of QEMU running at the
same time, migrate to file:

    (qemu) migrate "exec:cat >zzz"

Start the target with -incoming "exec:cat zzz".  Better than nothing.