From: Christian Schoenebeck <linux_oss@crudebyte.com>
To: v9fs-developer@lists.sourceforge.net
Cc: netdev@vger.kernel.org,
Dominique Martinet <asmadeus@codewreck.org>,
Eric Van Hensbergen <ericvh@gmail.com>,
Latchesar Ionkov <lucho@ionkov.net>, Greg Kurz <groug@kaod.org>,
Vivek Goyal <vgoyal@redhat.com>
Subject: [PATCH 0/7] net/9p: remove msize limit in virtio transport
Date: Thu, 16 Sep 2021 20:26:08 +0200 [thread overview]
Message-ID: <cover.1631816768.git.linux_oss@crudebyte.com> (raw)
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
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!
Christian Schoenebeck (7):
net/9p: show error message if user 'msize' cannot be satisfied
9p/trans_virtio: separate allocation of scatter gather list
9p/trans_virtio: turn amount of sg lists into runtime info
9p/trans_virtio: introduce struct virtqueue_sg
net/9p: add trans_maxsize to struct p9_client
9p/trans_virtio: support larger msize values
9p/trans_virtio: resize sg lists to whatever is possible
include/net/9p/client.h | 2 +
net/9p/client.c | 18 ++-
net/9p/trans_virtio.c | 281 ++++++++++++++++++++++++++++++++++------
3 files changed, 261 insertions(+), 40 deletions(-)
--
2.20.1
next reply other threads:[~2021-09-16 19:30 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-16 18:26 Christian Schoenebeck [this message]
2021-09-16 18:24 ` [PATCH 1/7] net/9p: show error message if user 'msize' cannot be satisfied Christian Schoenebeck
2021-09-16 18:24 ` [PATCH 2/7] 9p/trans_virtio: separate allocation of scatter gather list Christian Schoenebeck
2021-09-16 18:24 ` [PATCH 3/7] 9p/trans_virtio: turn amount of sg lists into runtime info Christian Schoenebeck
2021-09-16 18:25 ` [PATCH 4/7] 9p/trans_virtio: introduce struct virtqueue_sg Christian Schoenebeck
2021-09-16 18:25 ` [PATCH 5/7] net/9p: add trans_maxsize to struct p9_client Christian Schoenebeck
2021-09-16 18:25 ` [PATCH 6/7] 9p/trans_virtio: support larger msize values Christian Schoenebeck
2021-09-17 12:02 ` Christian Schoenebeck
2021-09-16 18:25 ` [PATCH 7/7] 9p/trans_virtio: resize sg lists to whatever is possible Christian Schoenebeck
2021-09-17 2:09 ` [PATCH 0/7] net/9p: remove msize limit in virtio transport Jakub Kicinski
2021-09-17 12:04 ` Christian Schoenebeck
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