supermin: bump msize for 9p mounts
Should make the warning about degraded performing go away and possibly
even give us better performance!
```
qemu-system-x86_64: warning: 9p: degraded performance: a reasonable high
msize should be chosen on client/guest side (chosen msize is <= 8192).
See for details.
```
Fixes:
@@ -33,11 +33,13 @@ fi
umask 002
# set up workdir
+# For 9p mounts set msize to 100MiB
+# https://github.com/coreos/coreos-assembler/issues/2171
mkdir -p "${workdir:?}"
-mount -t 9p -o rw,trans=virtio,version=9p2000.L workdir "${workdir}"
+mount -t 9p -o rw,trans=virtio,version=9p2000.L,msize=10485760 workdir "${workdir}"
if [ -L "${workdir}"/src/config ]; then
mkdir -p "$(readlink "${workdir}"/src/config)"
- mount -t 9p -o rw,trans=virtio,version=9p2000.L source "${workdir}"/src/config
+ mount -t 9p -o rw,trans=virtio,version=9p2000.L,msize=10485760 source "${workdir}"/src/config
fi
mkdir -p "${workdir}"/cache
cachedev=$(blkid -lt LABEL=cosa-cache -o device || true)
