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2012-12-20Merge tag 'virtio-next-for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull virtio update from Rusty Russell: "Some nice cleanups, and even a patch my wife did as a "live" demo for Latinoware 2012. There's a slightly non-trivial merge in virtio-net, as we cleaned up the virtio add_buf interface while DaveM accepted the mq virtio-net patches." * tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (27 commits) virtio_console: Add support for remoteproc serial virtio_console: Merge struct buffer_token into struct port_buffer virtio: add drv_to_virtio to make code clearly virtio: use dev_to_virtio wrapper in virtio virtio-mmio: Fix irq parsing in command line parameter virtio_console: Free buffers from out-queue upon close virtio: Convert dev_printk(KERN_<LEVEL> to dev_<level>( virtio_console: Use kmalloc instead of kzalloc virtio_console: Free buffer if splice fails virtio: tools: make it clear that virtqueue_add_buf() no longer returns > 0 virtio: scsi: make it clear that virtqueue_add_buf() no longer returns > 0 virtio: rpmsg: make it clear that virtqueue_add_buf() no longer returns > 0 virtio: net: make it clear that virtqueue_add_buf() no longer returns > 0 virtio: console: make it clear that virtqueue_add_buf() no longer returns > 0 virtio: make virtqueue_add_buf() returning 0 on success, not capacity. virtio: console: don't rely on virtqueue_add_buf() returning capacity. virtio_net: don't rely on virtqueue_add_buf() returning capacity. virtio-net: remove unused skb_vnet_hdr->num_sg field virtio-net: correct capacity math on ring full virtio: move queue_index and num_free fields into core struct virtqueue. ...
2012-12-18virtio: tools: make it clear that virtqueue_add_buf() no longer returns > 0Rusty Russell1-2/+2
We simplified virtqueue_add_buf(), make it clear in the callers. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-12-06tools:virtio: fix compilation warningCong Ding1-1/+1
We do not allow old-style function definition. Always spell foo(void) if a function does not take any parameters. Signed-off-by: Cong Ding <dinggnu@gmail.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-09-28tools: Fix pthread flag for Makefile of trace-agent used by virtio-traceYoshihiro YUNOMAE1-4/+3
pthread flag should not be -lpthread but -pthread using gcc. The -lpthread links the external multithread library. On the other hand, the -pthread manages both the gcc's preprocessor and linker to be able to compile with pthread. Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-09-28tools: Add guest trace agent as a user toolYoshihiro YUNOMAE6-0/+806
This patch adds a user tool, "trace agent" for sending trace data of a guest to a Host in low overhead. This agent has the following functions: - splice a page of ring-buffer to read_pipe without memory copying - splice the page from write_pipe to virtio-console without memory copying - write trace data to stdout by using -o option - controlled by start/stop orders from a Host Changes in v2: - Cleanup (change fprintf() to pr_err() and an include guard) Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com> Acked-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2012-05-02virtio/tools: add delayed interupt modeMichael S. Tsirkin2-4/+23
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-02-28tools/virtio: stub out strong barriersMichael S. Tsirkin1-0/+3
The tool should never use them, abort if it does. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-02-28tools/virtio: add linux/hrtimer.h stubMichael S. Tsirkin1-0/+0
Make tool build after virtio changes broke it. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-02-28tools/virtio: add linux/module.h stubMichael S. Tsirkin1-0/+0
Make the tool build again after virtio changes broke it. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-01-12virtio: rename virtqueue_add_buf_gfp to virtqueue_add_bufRusty Russell2-16/+8
Remove wrapper functions. This makes the allocation type explicit in all callers; I used GPF_KERNEL where it seemed obvious, left it at GFP_ATOMIC otherwise. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Reviewed-by: Christoph Hellwig <hch@lst.de>
2012-01-12virtio: harsher barriers for rpmsg.Rusty Russell2-1/+3
We were cheating with our barriers; using the smp ones rather than the real device ones. That was fine, until rpmsg came along, which is used to talk to a real device (a non-SMP CPU). Unfortunately, just putting back the real barriers (reverting d57ed95d) causes a performance regression on virtio-pci. In particular, Amos reports netbench's TCP_RR over virtio_net CPU utilization increased up to 35% while throughput went down by up to 14%. By comparison, this branch is in the noise. Reference: https://lkml.org/lkml/2011/12/11/22 Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-05-30virtio_test: support event indexMichael S. Tsirkin1-2/+17
Add ability to test the new event idx feature, enable by default. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-12-09tools/virtio: virtio_test toolMichael S. Tsirkin5-0/+487
This is the userspace part of the tool: it includes a bunch of stubs for linux APIs, somewhat simular to linuxsched. This makes it possible to recompile the ring code in userspace. A small test example is implemented combining this with vhost_test module. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2010-12-09vhost test moduleMichael S. Tsirkin2-0/+3
This adds a test module for vhost infrastructure. Intentionally not tied to kbuild to prevent people from installing and loading it accidentally. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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