Re: [PATCH v5 00/11] remove msize limit in virtio transport

From: Dominique Martinet
Date: Tue Jul 12 2022 - 17:13:52 EST

Alright; anything I didn't reply to looks good to me.

Christian Schoenebeck wrote on Tue, Jul 12, 2022 at 04:35:54PM +0200:
> * Patches 1..6 remove the msize limitation from the 'virtio' transport
> (i.e. the 9p 'virtio' transport itself actually supports >4MB now, tested
> successfully with an experimental QEMU version and some dirty 9p Linux
> client hacks up to msize=128MB).

I have no problem with this except for the small nitpicks I gave, but
would be tempted to delay this part for one more cycle as it's really
independant -- what do you think?

> * Patch 7 limits msize for all transports to 4 MB for now as >4MB would need
> more work on 9p client level (see commit log of patch 7 for details).
> * Patches 8..11 tremendously reduce unnecessarily huge 9p message sizes and
> therefore provide performance gain as well. So far, almost all 9p messages
> simply allocated message buffers exactly msize large, even for messages
> that actually just needed few bytes. So these patches make sense by
> themselves, independent of this overall series, however for this series
> even more, because the larger msize, the more this issue would have hurt
> otherwise.

time-wise we're getting close to the merge window already (probably in 2
weeks), how confident are you in this?
I can take patches 8..11 in -next now and probably find some time to
test over next weekend, are we good?