Multiple Port Support for virtio-console
Amit Shah
amit.shah at redhat.com
Thu Sep 10 04:57:12 PDT 2009
On (Wed) Sep 09 2009 [13:41:59], Amit Shah wrote:
>
> Hello all,
>
> Here is a new iteration of the patch series that implements a
> transport for guest and host communications.
>
> I've tested for compatibility (old qemu & new kernel, new qemu & old
> kernel, new qemu & new kernel) and it all works fine*. Migration works
> with the patch Juan just posted.
>
> There are a few items on my todo list but this works well.
>
> New since last send:
> - migrate per-port buffers that are queued up
> - in-qemu api for open/close/read/write of ports.
> - the read() is a callback that's invoked when complete data
> corresponding to one write() request on the guest is available.
> - removed comments from virtio_console.c that are no longer relevant.
> - address review comments by Juan
>
> TODO:
> - Convert all config writes to little endian in qemu / convert from
> little endian to host endian in guest
> - Address a few FIXMEs spread in the code
> - Introduce a watermark to stop a rogue host process flooding guest
> with data
>
> Conditions:
> * Heavy IO on an hvc port and a non-hvc port causes memory corruption
> each time, same place. It could be realted to locking but I doubt
> that. This still has to be sorted out
I can't reproduce this badness anymore with the linux-next kernel in the
guest.
So I request the maintainers to please review this patchset for and
consider for inclusion.
Thanks,
Amit
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