Re: [PATCH 0/7] net/9p: remove msize limit in virtio transport
From: Jakub Kicinski <kuba@kernel.org>
Date: 2021-09-17 02:09:11
On Thu, 16 Sep 2021 20:26:08 +0200 Christian Schoenebeck wrote:
This is an initial draft for getting rid of the current 500k 'msize' limitation in the 9p virtio transport, which is currently a bottleneck for performance of Linux 9p mounts. This is a follow-up of the following series and discussion: https://lore.kernel.org/all/28bb651ae0349a7d57e8ddc92c1bd5e62924a912.1630770829.git.linux_oss@crudebyte.com/T/#eb647d0c013616cee3eb8ba9d87da7d8b1f476f37 (local) Known limitation: With this series applied I can run QEMU host <-> 9P virtio <-> Linux guest with up to 3 MB msize. If I try to run it with 4 MB it seems to hit some limitation on QEMU side: qemu-system-x86_64: virtio: too many write descriptors in indirect table I haven't looked into this issue yet. Testing and feedback appreciated!
nit - please run ./scripts/kernel-doc -none on files you're changing. There seems to be a handful of warnings like this added by the series: net/9p/trans_virtio.c:155: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst