From: Christoph Hellwig h...@lst.de
It seems like the addition of QUEUE_FLAG_VIRT caueses major performance
regressions for Fedora users:
https://bugzilla.redhat.com/show_bug.cgi?id=509383
https://bugzilla.redhat.com/show_bug.cgi?id=505695
while I can't reproduce those extreme
From: Christoph Hellwig h...@lst.de
Currently virtio-blk doesn't set any QUEUE_ORDERED_ flag by default, which
means it does not allow filesystems to use barriers. But the typical use
case for virtio-blk is to use a backed that uses synchronous I/O, and in
that case we can simply set
This API change means that virtio_net can tell how much capacity
remains for buffers. It's necessarily fuzzy, since
VIRTIO_RING_F_INDIRECT_DESC means we can fit any number of descriptors
in one, *if* we can kmalloc.
Signed-off-by: Rusty Russell ru...@rustcorp.com.au
Cc: Dinesh Subhraveti
From: =?UTF-8?B?RmVybmFuZG8gTHVpcyBWw6F6cXVleiBDYW8=?=
Virtio IDs are spread all over the tree which makes assigning new IDs
bothersome. Putting them together should make the process less error-prone.
Signed-off-by: Fernando Luis Vazquez Cao ferna...@oss.ntt.co.jp
Signed-off-by: Rusty Russell
We still assume the Guest and Host have the same PAGE_OFFSET settings,
but now we don't assume 0xC000.
Signed-off-by: Rusty Russell ru...@rustcorp.com.au
Cc: Matias Zabaljauregui zabaljaure...@gmail.com
---
drivers/lguest/page_tables.c |6 ++
1 file changed, 2 insertions(+), 4
VIRTIO_F_NOTIFY_ON_EMPTY indicates to the Guest that we will hit them with
an interrupt every time the xmit queue is emptied.
Because it results in lots of tx interrupts, modern Guests probably don't
want it, so let's only force it when they accept the option.
Signed-off-by: Rusty Russell
From: Xiao Guangrong xiaoguangr...@cn.fujitsu.com
We can use alloc_page() instead of get_zeroed_page() and virt_to_page()
Signed-off-by: Xiao Guangrong xiaoguangr...@cn.fujitsu.com
Signed-off-by: Rusty Russell ru...@rustcorp.com.au
---
drivers/lguest/core.c |5 ++---
1 file changed, 2
Again, this is paravirtual serial device and I think it's entirely
reasonable for people to hook up these ports in the guest directly to
physical serial devices in the host.
virtio doesn't support all those features.
I fail to see how this is at all relevant. This is a virtual
machine,
On Sun, 20 Sep 2009 09:42:47 +0200
Ingo Molnar mi...@elte.hu wrote:
If we were able to rip out all (or most) of paravirt from arch/x86 it
would be tempting for other technical reasons - but the patch above
is well localized.
interesting question is if this would allow us to remove a few of
On Mon, 21 Sep 2009 16:37:22 +0930
Rusty Russell ru...@rustcorp.com.au wrote:
Actually this framework can apply to traditional network adapters which
have
just one tx/rx queue pair. And applications using the same user/kernel
interface
can utilize this framework to send/receive
* Stephen Hemminger (shemmin...@vyatta.com) wrote:
On Mon, 21 Sep 2009 16:37:22 +0930
Rusty Russell ru...@rustcorp.com.au wrote:
Actually this framework can apply to traditional network adapters which
have
just one tx/rx queue pair. And applications using the same user/kernel
On 09/21/09 00:22, Rusty Russell wrote:
If we're building a pte, we can use simple assigment; only use set_pte
etc. when we're actually going to use that destination as a PTE. I
don't know that we'll ever run under Xen, but it's neater.
I've always thought it would be a Neat Thing To Try.
On Wed, Sep 16, 2009 at 11:11:57PM -0400, Gregory Haskins wrote:
Avi Kivity wrote:
On 09/16/2009 10:22 PM, Gregory Haskins wrote:
Avi Kivity wrote:
On 09/16/2009 05:10 PM, Gregory Haskins wrote:
If kvm can do it, others can.
The problem is that you seem to
On Sat, 12 Sep 2009 01:30:10 am Alan Cox wrote:
The interface presented to guest userspace is of a simple char
device, so it can be used like this:
fd = open(/dev/vcon2, O_RDWR);
ret = read(fd, buf, 100);
ret = write(fd, string, strlen(string));
Each port is to be
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