Displaying 7 results from an estimated 7 matches for "netbk_count_requests".
2013 Feb 01
45
netback Oops then xenwatch stuck in D state
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
2013 Feb 06
0
[PATCH 1/4] xen/netback: shutdown the ring if it contains garbage.
...n-netback/netback.c
@@ -888,6 +888,13 @@ static void netbk_tx_err(struct xenvif *vif,
xenvif_put(vif);
}
+static void netbk_fatal_tx_err(struct xenvif *vif)
+{
+ netdev_err(vif->dev, "fatal error; disabling device\n");
+ xenvif_carrier_off(vif);
+ xenvif_put(vif);
+}
+
static int netbk_count_requests(struct xenvif *vif,
struct xen_netif_tx_request *first,
struct xen_netif_tx_request *txp,
@@ -901,19 +908,22 @@ static int netbk_count_requests(struct xenvif *vif,
do {
if (frags >= work_to_do) {
- netdev_dbg(vif->dev, "Need more frags\n");
+ netdev_err(vif->...
2013 Apr 30
6
[PATCH net-next 2/2] xen-netback: avoid allocating variable size array on stack
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-netb...
2008 Mar 04
2
Question on sg in netback tx path
...trouble with the sg stuff on the tx path.
Taking an icmp packet as an example, windows formats the packet like
this:
sg entry 0 - Ethernet header
sg entry 1 - IP header
sg entry 2 - payload
Those pieces could be anywhere inside the page.
In netback.c, it appears that the sg magic happens inside
netbk_count_requests. The following statement confuses me:
"
if (txp->size > first->size) {
DPRINTK("Frags galore\n");
return -frags;
}
"
If I interpret the implications of that correctly, the ''size...
2013 Jul 10
13
[PATCH v2 1/1] xen/netback: correctly calculate required slots of skb.
...e of header
data is not zero, and is also inconsistent with following calculation for
required slot in netbk_gop_skb.
In netbk_gop_skb, required slots are calculated based on offset and len in page
of header data. It is possible that required slots here is larger than the one
calculated in earlier netbk_count_requests. This inconsistency directly results
in rx_req_cons_peek and xen_netbk_rx_ring_full judgement are wrong.
Then it comes to situation the ring is actually full, but netback thinks it is
not and continues to create responses. This results in response overlaps request
in the ring, then grantcopy gets...
2013 Jan 04
31
xennet: skb rides the rocket: 20 slots
Hi Ian,
Today i fired up an old VM with a bittorrent client, trying to download some torrents.
I seem to be hitting the unlikely case of "xennet: skb rides the rocket: xx slots" and this results in some dropped packets in domU, I don''t see any warnings in dom0.
I have added some extra info, but i don''t have enough knowledge if this could/should be prevented from
2013 Jul 09
20
[PATCH 1/1] xen/netback: correctly calculate required slots of skb.
...e of header
data is not zero, and is also inconsistent with following calculation for
required slot in netbk_gop_skb.
In netbk_gop_skb, required slots are calculated based on offset and len in page
of header data. It is possible that required slots here is larger than the one
calculated in earlier netbk_count_requests. This inconsistency directly results
in rx_req_cons_peek and xen_netbk_rx_ring_full judgement are wrong.
Then it comes to situation the ring is actually full, but netback thinks it is
not and continues to create responses. This results in response overlaps request
in the ring, then grantcopy gets...