Re: virtio net regression

Avi Kivity wrote: Antoine Martin wrote: Hi, Here is another one, any ideas? These oopses do look quite deep. Is it normal to end up in tcp_send_ack from pdflush?? I think it can happen anywhere, part of the net softirq. Hah, gotcha. Cheers Antoine [929492.154634] pdflush: page

Re: virtio net regression

Antoine Martin wrote: You're out of memory. That's quite odd, the guest wasn't even hitting the swap at the tine. But you do have swap enabled? Strange, seems to be a bit of free memory here. There should be lots, all this host is doing is apache+sftp... Assuming I can

Re: virtio net regression

Avi Kivity wrote: Antoine Martin wrote: You're out of memory. That's quite odd, the guest wasn't even hitting the swap at the tine. But you do have swap enabled? Yes. I always do this on the guests as it seems fairer to let the guests use swap when they need the extra memory rather

Re: virtio net regression

Antoine Martin wrote: But you do have swap enabled? Yes. I always do this on the guests as it seems fairer to let the guests use swap when they need the extra memory rather than over-committing too much memory on the host. Although it would probably be more efficient overall to let the

Re: virtio net regression

Antoine Martin wrote: Hi, Here is another one, any ideas? These oopses do look quite deep. Is it normal to end up in tcp_send_ack from pdflush?? I think it can happen anywhere, part of the net softirq. Cheers Antoine [929492.154634] pdflush: page allocation failure. order:0, mode:0x20

Re: virtio net regression

Re-sending as this does not seem to have made it to the list. Antoine Martin wrote: Hi, Here is another one, any ideas? These oopses do look quite deep. Is it normal to end up in tcp_send_ack from pdflush?? Cheers Antoine [929492.154634] pdflush: page allocation failure. order:0,

Re: virtio net regression

From: Antoine Martin anto...@devloop.org.uk Date: Wed, 13 May 2009 19:58:45 +0700 Re-sending as this does not seem to have made it to the list. It made it, it's just that nobody has had a chance to look into this. -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a

Re: virtio net regression

Hi, Here is another one, any ideas? These oopses do look quite deep. Is it normal to end up in tcp_send_ack from pdflush?? Cheers Antoine [929492.154634] pdflush: page allocation failure. order:0, mode:0x20 [929492.154637] Pid: 291, comm: pdflush Not tainted 2.6.29.2 #5 [929492.154639] Call

Re: virtio net regression

Hi Still getting (some but less) network issues with a 2.6.28.9 host. Found quite a few of these call traces in the 2.6.29.1 guests: Guest has 512MB of memory and was not all that busy (just network traffic), so I don't understand why it would fail to allocate a page... [701453.834571]

Re: virtio net regression

On Sun, 2009-04-19 at 14:48 +0300, Avi Kivity wrote: Antoine Martin wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA512 Wireshark was showing a huge amount of invalid packets (wrong checksum) - - that was the cause of the slowdown. Simply rebooting the host into 2.6.28.9 fixed

Re: virtio net regression

Hi, The bug report below does indeed match everything I have experienced. Upon further inspection, 2.6.28.9 is also affected, just less so. Unfortunately I have applied this patch to 2.6.29.1: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=2f181855a0 And if

Re: virtio net regression

-BEGIN PGP SIGNED MESSAGE- Hash: SHA512 Wireshark was showing a huge amount of invalid packets (wrong checksum) - - that was the cause of the slowdown. Simply rebooting the host into 2.6.28.9 fixed *everything*, regardless of whether the guests use virtio or ne2k_pci/etc. The guests are