[Bug 579276] [NEW] Lost network in KVM VM / virtio_net page allocation failure

[lhotari]

Public bug reported:

Binary package hint: 2.6.32-21-server

I'm seeing similar bugs in a VM running Lucid as there is reported in these Redhat bug reports:
https://bugzilla.redhat.com/show_bug.cgi?id=520119
https://bugzilla.redhat.com/show_bug.cgi?id=554078

The network connection drops in a KVM VM under high load.
"ifdown eth0 ; ifup eth0 " returns the connection.

This is the dmesg error:
[714069.829649] swapper: page allocation failure. order:0, mode:0x20
[714069.829653] Pid: 0, comm: swapper Not tainted 2.6.32-21-server #32-Ubuntu
[714069.829655] Call Trace:
[714069.829657]  <IRQ>  [<ffffffff810f97de>] __alloc_pages_slowpath+0x56e/0x580
[714069.829674]  [<ffffffff810f9961>] __alloc_pages_nodemask+0x171/0x180
[714069.829682]  [<ffffffff8112c597>] alloc_pages_current+0x87/0xd0
[714069.829687]  [<ffffffff813d6f72>] try_fill_recv+0x182/0x200
[714069.829690]  [<ffffffff813d719d>] virtnet_poll+0x10d/0x160
[714069.829700]  [<ffffffff810397a9>] ? default_spin_lock_flags+0x9/0x10
[714069.829708]  [<ffffffff81470a7f>] net_rx_action+0x10f/0x250
[714069.829713]  [<ffffffff8106e257>] __do_softirq+0xb7/0x1e0
[714069.829717]  [<ffffffff810c4880>] ? handle_IRQ_event+0x60/0x170
[714069.829722]  [<ffffffff810142ec>] call_softirq+0x1c/0x30
[714069.829725]  [<ffffffff81015cb5>] do_softirq+0x65/0xa0
[714069.829727]  [<ffffffff8106e0f5>] irq_exit+0x85/0x90
[714069.829733]  [<ffffffff8155c615>] do_IRQ+0x75/0xf0
[714069.829736]  [<ffffffff81013b13>] ret_from_intr+0x0/0x11
[714069.829737]  <EOI>  [<ffffffff81038acb>] ? native_safe_halt+0xb/0x10
[714069.829746]  [<ffffffff8101b68d>] ? default_idle+0x3d/0x90
[714069.829753]  [<ffffffff81011e63>] ? cpu_idle+0xb3/0x110
[714069.829757]  [<ffffffff8153f47b>] ? rest_init+0x6b/0x80
[714069.829763]  [<ffffffff8187adcc>] ? start_kernel+0x368/0x371
[714069.829766]  [<ffffffff8187a33a>] ? x86_64_start_reservations+0x125/0x129
[714069.829768]  [<ffffffff8187a438>] ? x86_64_start_kernel+0xfa/0x109
[714069.829770] Mem-Info:
[714069.829772] Node 0 DMA per-cpu:
[714069.829775] CPU    0: hi:    0, btch:   1 usd:   0
[714069.829776] Node 0 DMA32 per-cpu:
[714069.829778] CPU    0: hi:  186, btch:  31 usd: 196
[714069.829783] active_anon:109561 inactive_anon:110789 isolated_anon:0
[714069.829784]  active_file:7041 inactive_file:13781 isolated_file:0
[714069.829785]  unevictable:0 dirty:8681 writeback:0 unstable:0
[714069.829786]  free:1367 slab_reclaimable:2798 slab_unreclaimable:1783
[714069.829787]  mapped:2113 shmem:83 pagetables:1148 bounce:0
[714069.829789] Node 0 DMA free:4000kB min:60kB low:72kB high:88kB active_anon:5508kB inactive_anon:5668kB active_file:396kB inactive_file:292kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15348kB mlocked:0kB dirty:0kB writeback:0kB mapped:28kB shmem:0kB slab_reclaimable:8kB slab_unreclaimable:8kB kernel_stack:0kB pagetables:20kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[714069.829799] lowmem_reserve[]: 0 994 994 994
[714069.829802] Node 0 DMA32 free:1468kB min:4000kB low:5000kB high:6000kB active_anon:432736kB inactive_anon:437488kB active_file:27768kB inactive_file:54832kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:1018060kB mlocked:0kB dirty:34724kB writeback:0kB mapped:8424kB shmem:332kB slab_reclaimable:11184kB slab_unreclaimable:7124kB kernel_stack:1408kB pagetables:4572kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[714069.829811] lowmem_reserve[]: 0 0 0 0
[714069.829814] Node 0 DMA: 0*4kB 2*8kB 5*16kB 6*32kB 4*64kB 3*128kB 2*256kB 1*512kB 0*1024kB 1*2048kB 0*4096kB = 4000kB
[714069.829823] Node 0 DMA32: 69*4kB 1*8kB 0*16kB 1*32kB 0*64kB 1*128kB 0*256kB 0*512kB 1*1024kB 0*2048kB 0*4096kB = 1468kB
[714069.829830] 22928 total pagecache pages
[714069.829832] 2031 pages in swap cache
[714069.829834] Swap cache stats: add 74010, delete 71979, find 90506/93667
[714069.829836] Free swap  = 804372kB
[714069.829837] Total swap = 897016kB
[714069.840685] 262139 pages RAM
[714069.840689] 6216 pages reserved
[714069.840690] 22948 pages shared
[714069.840691] 234443 pages non-shared


Version details:
linux-image-2.6.32-21-server
2.6.32-21-server #32-Ubuntu SMP Fri Apr 16 09:17:34 UTC 2010 x86_64 GNU/Linux
Ubuntu 2.6.32-21.32-server 2.6.32.11+drm33.2

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: kvm net virtio

-- 
Lost network in KVM VM / virtio_net page allocation failure
https://bugs.launchpad.net/bugs/579276
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