similar to: [PATCH net-next 0/3] xen-netback: switch to NAPI + kthread 1:1 model

time_after_eq() only works if the delta is < MAX_ULONG/2. For a 32bit Dom0, if netfront sends packets at a very low rate, the time between subsequent calls to tx_credit_exceeded() may exceed MAX_ULONG/2 and the test for timer_after_eq() will be incorrect. Credit will not be replenished and the guest may become unable to send packets (e.g., if prior to the long gap, all credit was exhausted).

hello, I tried using NAPI in pv network drivers, but i discovered that it don''t supports NAPI (kernel 3.5.0-17, xen 4.3.1). I like to know if any version of pv driver supports NAPI regards Eduardo _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users

The code to detect fragments in checksum_setup() was missing for IPv4 and too eager for IPv6. (It transpires that Windows seems to send IPv6 packets with a fragment header even if they are not a fragment - i.e. offset is zero, and M bit is not set). Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Cc: Wei Liu <wei.liu2@citrix.com> Cc: Ian Campbell <ian.campbell@citrix.com>

This dependence is undesirable and logically incorrect. It''s undesirable because Xen network protocol should not depend on a OS-specific constant. It''s incorrect because the ring slots required doesn''t correspond to the number of frags a SKB has (consider compound page frags). This patch removes this dependence by correctly counting the ring slots required.

Some old Windows frontends fail to transition through the xenbus Closing state and move directly from Connected to Closed. Handle this case properly. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Wei Liu <wei.liu2@citrix.com> Cc: Ian Campbell <ian.campbell@citrix.com> --- drivers/net/xen-netback/xenbus.c | 2 ++ 1

This patch adds code to handle SKB_GSO_TCPV6 skbs and construct appropriate extra or prefix segments to pass the large packet to the frontend. New xenstore flags, feature-gso-tcpv6 and feature-gso-tcpv6-prefix, are sampled to determine if the frontend is capable of handling such packets. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Cc: Wei Liu <wei.liu2@citrix.com> Cc: David

Netback and netfront only use one event channel to do tx / rx notification. This may cause unnecessary wake-up of process routines. This patch adds a new feature called feautre-split-event-channel to netback, enabling it to handle Tx and Rx event separately. Netback will use tx_irq to notify guest for tx completion, rx_irq for rx notification. If frontend doesn''t support this feature,

We''ve been hitting the following issue on a variety of hosts and recent Xen/dom0 version combinations. Here''s an excerpt from our latest: Xen: 4.1.4 (xenbits @ 23432) Dom0: 3.7.1-x86_64 BUG: unable to handle kernel NULL pointer dereference at 000000000000001c IP: [<ffffffff8141a301>] evtchn_from_irq+0x11/0x40 PGD 0 Oops: 0000 [#1] SMP Modules linked in: ebt_comment

Tune xen_netbk_count_requests to not touch working array beyond limit, so that we can make working array size constant. Signed-off-by: Wei Liu <wei.liu2@citrix.com> --- drivers/net/xen-netback/netback.c | 26 +++++++++++++++++++++----- 1 file changed, 21 insertions(+), 5 deletions(-) diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index

> That''s great, except when you need *two* bridges, for two > independent subnets, and there is no, as far as I can see, peth1. You can have multiple vethX interfaces on recent builds -- see netback/loopback.c. I think the current default is a rather miserly 1 (and should be increased), but can be set on the command line. Ian > Em Wednesday 14 September 2005 16:30, John

Signed-off-by: Wei Liu <wei.liu2@citrix.com> --- MAINTAINERS | 1 + 1 file changed, 1 insertion(+) diff --git a/MAINTAINERS b/MAINTAINERS index e61c2e8..3c441ce 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9366,6 +9366,7 @@ F: arch/arm64/include/asm/xen/ XEN NETWORK BACKEND DRIVER M: Ian Campbell <ian.campbell@citrix.com> +M: Wei Liu <wei.liu2@citrix.com> L:

On Wed 2023-01-25 10:57:30, Seth Forshee wrote: > On Wed, Jan 25, 2023 at 12:34:26PM +0100, Petr Mladek wrote: > > On Tue 2023-01-24 11:21:39, Seth Forshee wrote: > > > On Tue, Jan 24, 2023 at 03:17:43PM +0100, Petr Mladek wrote: > > > > On Fri 2023-01-20 16:12:22, Seth Forshee (DigitalOcean) wrote: > > > > > Livepatch relies on stack checking of

Add xen-backend:vif module alias to the xen-netback module. This allows automatic loading of the module. Signed-off-by: Bastian Blank <waldi at debian.org> Acked-by: Ian Campbell <ian.campbell at citrix.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com> --- drivers/net/xen-netback/netback.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git

Add xen-backend:vif module alias to the xen-netback module. This allows automatic loading of the module. Signed-off-by: Bastian Blank <waldi at debian.org> Acked-by: Ian Campbell <ian.campbell at citrix.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com> --- drivers/net/xen-netback/netback.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git

Add xen-backend:vif module alias to the xen-netback module. This allows automatic loading of the module. Signed-off-by: Bastian Blank <waldi at debian.org> Acked-by: Ian Campbell <ian.campbell at citrix.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com> --- drivers/net/xen-netback/netback.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git

# HG changeset patch # User Ian Campbell <ian.campbell@citrix.com> # Date 1233846695 0 # Node ID 7a24febd95d5abfc03e05de7fa991b11cef14eef # Parent 4f998fd102e24daa471482730d1a3ff68faa1ad6 netback: add ethtool stat to track copied skbs. copied skbs should be rare but we have no way of verifying that. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> diff -r 4f998fd102e2 -r

This patch adds a new feature called feature-split-event-channels for netfront, enabling it to handle TX and RX events separately. If netback does not support this feature, it falls back to use single event channel. Signed-off-by: Wei Liu <wei.liu2@citrix.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com> --- drivers/net/xen-netfront.c | 173

From: pbonzini@redhat.com # HG changeset patch # User Paolo Bonzini <pbonzini@redhat.com> # Date 1318837036 -7200 # Node ID eb896361fc70b60b9a257d0c82e19633a11b9d41 # Parent 3c900d6a5f6a51ff1547f21fef30ab8b92feccc9 netback: disable features not supported by netfront Netback works by first setting all possible features, and then resetting some after connection, if the front-end

Fixes error from sparse: CHECK drivers/net/xen-netback/xenbus.c drivers/net/xen-netback/xenbus.c:29:40: error: dubious one-bit signed bitfield int have_hotplug_status_watch:1; Reported-by: Dr. David Alan Gilbert <linux at treblig.org> Signed-off-by: Ian Campbell <ian.campbell at citrix.com> Cc: netdev at vger.kernel.org Cc: xen-devel at lists.xensource.com ---

Fixes error from sparse: CHECK drivers/net/xen-netback/xenbus.c drivers/net/xen-netback/xenbus.c:29:40: error: dubious one-bit signed bitfield int have_hotplug_status_watch:1; Reported-by: Dr. David Alan Gilbert <linux at treblig.org> Signed-off-by: Ian Campbell <ian.campbell at citrix.com> Cc: netdev at vger.kernel.org Cc: xen-devel at lists.xensource.com ---