similar to: netback Oops then xenwatch stuck in D state

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

A buggy or malicious frontend should not be able to confuse netback. If we spot anything which is not as it should be then shutdown the device and don''t try to continue with the ring in a potentially hostile state. Well behaved and non-hostile frontends will not be penalised. As well as making the existing checks for such errors fatal also add a new check that ensures that there

I''m trying to improve performance on the gpl pv drivers for windows, and am running into 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

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

Patrick, there following patches fix xenpaging for me. Granttable handling is incomplete. If a page is gone, a GNTST_eagain should be returned to the caller to inidcate the hypercall has to be retried after a while, until the page is available again. Please review. Olaf _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

Hi Xen developers, I had some questions regarding XSA39, and I hope you all can answer them. We''ve been rolling out some hosts with the XSA39 patch applied and have come across a problem where a few of our customer DomUs keep hitting the conditions which call netbk_fatal_tx_err(), mostly "Frag is bigger than frame." These specific DomUs hit it repeatedly, between once every

VM traffic is already limited by a throughput limit, but there is no control over the maximum packet per second (PPS). In DDOS attack the major issue is rather PPS than throughput. With provider offering more bandwidth to VMs, it becames easy to coordinate a massive attack using VMs. Example: 100Mbits ~ 200kpps using 64B packets. This patch provides a new option to limit VMs maximum packets per

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

hi I've some problems with netback 1.what's mmap_pages for, which come from balloon operation ？ mmap_pages = alloc_empty_pages_and_pagevec(MAX_PENDING_REQS) 2.what's the meaning of "refcnt" defined in netif_t (netif->refcnt) 3.irq enable and disable such as disable_irq(netif->irq); why netback use such enable & disable operations while netfront dont use for its

This is netback multithread support patchset version 4. Main Changes from v3: 1. Patchset is against xen/next tree. 2. Merge group and idx into netif->mapping. 3. Use vmalloc to allocate netbk structures. Main Changes from v2: 1. Merge "group" and "idx" into "netif->mapping", therefore page_ext is not used now. 2. Put netbk_add_netif() and netbk_remove_netif()

When counting required slots for skb, netback directly uses DIV_ROUND_UP to get slots required by header data. This is wrong when offset in the page 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

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

Hi Keir: These two patches remove the need for netloop by performing the copying in netback and only if it is necessary. The rationale is that most packets will be processed without delay allowing them to be freed without copying at all. So instead of copying every packet destined to dom0 we''ll only copy those that linger longer than a specified amount of time (currently 0.5s). As it

Hi all, I''ve taken a stab at documenting the current interface between netfront and netback drivers, here: http://wiki.xensource.com/xenwiki/XenNetFrontBackInterface Currently, the only way for non-Linux implementers to adhere to this interface is to study the Linux netfront driver, which has a great deal of optimizations and is not meant to be documentation. I''d love it if

I get backtraces from the dom0 kernel when running a guest with networking (via netback) enabled such as the one below (there are some slight variations but the first two lines and most of the rest of the contents are the same). Michael Young BUG: sleeping function called from invalid context at mm/page_alloc.c:2190 in_atomic(): 1, irqs_disabled(): 0, pid: 0, name: swapper Pid: 0, comm:

Hi guys, I'm have a pure 64-bit system (Intel based). Due to that I can't use 32-bit ELF extlinux binary provided in the syslinux-6.03 package. Unfortunately building extlinux installer failed... See error below after these command: make bios clean make bios (failed) ... ar cq liblpxelinux.a rawcon.o pxeboot.o pxelinux-c.o fs/pxe/dhcp_option.o fs/pxe/pxe.o fs/pxe/tftp.o

When using Textpattern with PHP Markdown Extra there is a problem with the textpattern tags. Tags like <txp:image id="42" /> are parsed, but tags like <txp:site_name /> that have an underscore are not. Any ideas how to deal with this? Thanks list, -- Peter Sinn peter.sinn at gmail.com -------------- next part -------------- An HTML attachment was scrubbed... URL:

On Sun, Feb 8, 2015 at 7:49 PM, Alexey Orishko via Syslinux <syslinux at zytor.com> wrote: > Hi guys, > > I'm have a pure 64-bit system (Intel based). Due to that I can't use 32-bit ELF > extlinux binary provided in the syslinux-6.03 package. > > Unfortunately building extlinux installer failed... > > See error below after these command: > make bios clean

On Sun, 8 Feb 2015 20:21:58 -0500 Gene Cumm via Syslinux <syslinux at zytor.com> wrote: > On Sun, Feb 8, 2015 at 7:49 PM, Alexey Orishko via Syslinux > <syslinux at zytor.com> wrote: > > Hi guys, > > > > I'm have a pure 64-bit system (Intel based). Due to that I can't > > use 32-bit ELF extlinux binary provided in the syslinux-6.03 > >