On Fri, 18 Apr 2008 14:39:48 +1000 Rusty Russell [EMAIL PROTECTED] wrote:
virtio introduced a ring structure ABI for guest-host communications
(currently used by lguest and kvm). Using this same ABI, we can
create a nice fd version.
This is useful for efficiently passing packets to and
On Fri, 18 Apr 2008 14:43:24 +1000 Rusty Russell [EMAIL PROTECTED] wrote:
This patch modifies tun to allow a vringfd to specify the send
buffer. The user does a write to push out packets from the buffer.
Again we use the 'struct virtio_net_hdr' to allow userspace to send
GSO packets. In
On Fri, Apr 18, 2008 at 10:13 AM, Rusty Russell [EMAIL PROTECTED] wrote:
This patch modifies tun to allow a vringfd to specify the send
buffer. The user does a write to push out packets from the buffer.
Again we use the 'struct virtio_net_hdr' to allow userspace to send
GSO packets. In
On Friday 18 April 2008 13:24:27 Herbert Xu wrote:
Finally this patch lets virtio_net receive GSO packets in addition
to sending them. This can definitely be optimised for the non-GSO
case. For comparison the Xen approach stores one page in each skb
and uses subsequent skb's pages to
On Sat, Apr 19, 2008 at 12:08:04AM +1000, Rusty Russell wrote:
On Friday 18 April 2008 13:24:27 Herbert Xu wrote:
Finally this patch lets virtio_net receive GSO packets in addition
to sending them. This can definitely be optimised for the non-GSO
case. For comparison the Xen approach
On Friday 18 April 2008 21:18:46 Andrew Morton wrote:
+ /* Must be a power of two, and limit indices to a u16. */
+ if (!num_descs || (num_descs (num_descs-1)) || num_descs 65536)
We have an is_power_of_2().
Thanks, fixed.
+ * vring_get - check out a vring file descriptor
+ *
On Fri, Apr 18, 2008 at 4:46 AM, pradeep singh rautela
[EMAIL PROTECTED] wrote:
On Fri, Apr 18, 2008 at 10:13 AM, Rusty Russell [EMAIL PROTECTED] wrote:
+ /* How many pages will this take? */
+ npages = 1 + (base + len - 1)/PAGE_SIZE - base/PAGE_SIZE;
Hi
On Friday 18 April 2008 21:31:20 Andrew Morton wrote:
On Fri, 18 Apr 2008 14:43:24 +1000 Rusty Russell [EMAIL PROTECTED] wrote:
+ /* How many pages will this take? */
+ npages = 1 + (base + len - 1)/PAGE_SIZE - base/PAGE_SIZE;
Brain hurts. I hope you got that right.
I
On Fri, Apr 18, 2008 at 8:15 AM, Rusty Russell [EMAIL PROTECTED] wrote:
On Friday 18 April 2008 21:31:20 Andrew Morton wrote:
On Fri, 18 Apr 2008 14:43:24 +1000 Rusty Russell [EMAIL PROTECTED] wrote:
+ /* How many pages will this take? */
+ npages = 1 + (base + len
On Fri, Apr 18, 2008 at 7:55 PM, Ray Lee [EMAIL PROTECTED] wrote:
On Fri, Apr 18, 2008 at 4:46 AM, pradeep singh rautela
[EMAIL PROTECTED] wrote:
On Fri, Apr 18, 2008 at 10:13 AM, Rusty Russell [EMAIL PROTECTED] wrote:
+ /* How many pages will this take? */
+
On Sat, 19 Apr 2008 00:32:39 +1000 Rusty Russell [EMAIL PROTECTED] wrote:
Isn't this kinda-sorta like what a relayfs file does? The oprofile
buffers? etc? Nothing in common at all, no hope?
An excellent question, but I thought the modern kernel etiquette was to only
comment on
On Sat, 19 Apr 2008 01:15:15 +1000 Rusty Russell [EMAIL PROTECTED] wrote:
What is the maximum numbet of pages which an unpriviliged user can
concurrently pin with this code?
Since only root can open the tun device, it's currently OK. The old code
kmalloced and copied: is there some
On 4/18/08, Andrew Morton [EMAIL PROTECTED] wrote:
On Sat, 19 Apr 2008 00:32:39 +1000 Rusty Russell [EMAIL PROTECTED] wrote:
Isn't this kinda-sorta like what a relayfs file does? The oprofile
buffers? etc? Nothing in common at all, no hope?
An excellent question, but I thought
On Sat, 19 Apr 2008 01:15:15 +1000 Rusty Russell [EMAIL PROTECTED] wrote:
It's not clear to me why this is in swap.c, but it exists
even without CONFIG_SWAP, so that's OK.
We should have done mv mm/swap.c mm/mmlib.c years ago.
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