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Subject: Re: [PATCH 5/5] tun: vringfd xmit support.
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---
Warning
> On Sun, 20 Apr 2008 00:41:43 +1000 Rusty Russell <[EMAIL PROTECTED]> wrote:
> On Saturday 19 April 2008 05:06:34 Andrew Morton wrote:
> > 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
> > >
On Saturday 19 April 2008 05:06:34 Andrew Morton wrote:
> 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'
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.
___
Virtualization m
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 ther
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 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 +
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 ri
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;
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.
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.
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 this case, it can hint how much to copy, and the
other pages will be made into skb
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