bug#47225: QEMU warning about performance

[Leo Famulari]

On Tue, Apr 06, 2021 at 05:42:15PM -0400, Maxim Cournoyer wrote:
> From c720e68229322e5c38c0321b021e8d6430636111 Mon Sep 17 00:00:00 2001
> From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
> Date: Tue, 6 Apr 2021 17:37:33 -0400
> Subject: [PATCH] system: vm: Set a larger value for the msize option of the 9p
>  file system.
> 
> Fixes <https://issues.guix.gnu.org/47225>.
> 
> * gnu/system/vm.scm (mapping->file-system): Set the msize option to a value of
> 100 MiB (from the default 8 KiB).
> 
> Reported-by: Leo Famulari <leo@famulari.name>

Thanks! I'll test and push along with the next kernel update (that's
when I noticed this warning). Feel free to push sooner if you like.