[Xen-bugs] [Bug 675] New: page allocation failures

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=675

           Summary: page allocation failures
           Product: Xen
           Version: 3.0.2
          Platform: x86
        OS/Version: Linux-2.6
            Status: NEW
          Severity: critical
          Priority: P1
         Component: Unspecified
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: p.bugzilla.xensource.com@xxxxxxxxxxxxxxx


Hi.  I am seeing page allocation failures on various xen dom0's.  free does not
report any swap usage, and there is ample (3GB) swap.  I'm allocating 256MB to
dom0 (upping that to 400mb to see if it helps).  I see the problem on a number
of our xen servers.

FWIW we're using loop back mounted file systems for disk images.  We're doing
the 'standard' network setup.  We have about 34 domU's running on this
particular server.

Any other information I could provide that would help track this down?

# xm info
release                : 2.6.16.13-xen0
version                : #1 Fri Jun 2 21:58:08 UTC 2006
machine                : i686
nr_cpus                : 4
nr_nodes               : 1
sockets_per_node       : 2
cores_per_socket       : 2
threads_per_core       : 1
cpu_mhz                : 1792
hw_caps                :
178bfbff:e3d3fbff:00000000:00000010:00000001:00000000:00000003
total_memory           : 16320
free_memory            : 11245
xen_major              : 3
xen_minor              : 0
xen_extra              : .2-3
xen_caps               : xen-3.0-x86_32p
platform_params        : virt_start=0xf5800000
xen_changeset          : Tue May 30 18:14:05 2006 +0100 9697:18e8e613deb9
cc_compiler            : gcc version 3.4.5 20051201 (Red Hat 3.4.5-2)
cc_compile_by          : root
cc_compile_date        : Fri Jun  2 22:04:10 UTC 2006



Jun 12 04:24:24 host84 kernel: swapper: page allocation failure. order:0,
mode:0x20
Jun 12 04:24:24 host84 kernel:  [<c01396d4>] __alloc_pages+0x205/0x2fd
Jun 12 04:24:24 host84 kernel:  [<c01517d5>] kmem_getpages+0x35/0x96
Jun 12 04:24:24 host84 kernel:  [<c01524b4>] cache_grow+0xa8/0x173
Jun 12 04:24:24 host84 kernel:  [<c0152745>] cache_alloc_refill+0x1c6/0x1f6
Jun 12 04:24:24 host84 kernel:  [<c015294d>] kmem_cache_alloc+0x64/0x68
Jun 12 04:24:25 host84 kernel:  [<c02ba98e>] alloc_skb_from_cache+0x50/0x103
Jun 12 04:24:25 host84 kernel:  [<c0251f47>] __dev_alloc_skb+0x4d/0x79
Jun 12 04:24:25 host84 kernel:  [<c0259eba>] netif_be_start_xmit+0x7f/0x21a
Jun 12 04:24:25 host84 kernel:  [<c02c0313>] dev_queue_xmit+0x1a4/0x35c
Jun 12 04:24:25 host84 kernel:  [<c03070e7>] br_dev_queue_push_xmit+0x77/0x125
Jun 12 04:24:25 host84 kernel:  [<c030cf09>] br_nf_post_routing+0xdd/0x19d
Jun 12 04:24:25 host84 kernel:  [<c030cddf>] br_nf_dev_queue_xmit+0x0/0x4d
Jun 12 04:24:25 host84 kernel:  [<c0307070>] br_dev_queue_push_xmit+0x0/0x125
Jun 12 04:24:25 host84 kernel:  [<c02cf7bc>] nf_iterate+0x58/0x84
Jun 12 04:24:25 host84 kernel:  [<c0307070>] br_dev_queue_push_xmit+0x0/0x125
Jun 12 04:24:25 host84 kernel:  [<c0307070>] br_dev_queue_push_xmit+0x0/0x125
Jun 12 04:24:26 host84 kernel:  [<c02cf853>] nf_hook_slow+0x6b/0x11c
Jun 12 04:24:26 host84 kernel:  [<c0307070>] br_dev_queue_push_xmit+0x0/0x125
Jun 12 04:24:26 host84 kernel:  [<c03071f5>] br_forward_finish+0x60/0x6c
Jun 12 04:24:26 host84 kernel:  [<c0307070>] br_dev_queue_push_xmit+0x0/0x125
Jun 12 04:24:26 host84 kernel:  [<c030c6bd>] br_nf_forward_finish+0x59/0x138
Jun 12 04:24:26 host84 kernel:  [<c0307195>] br_forward_finish+0x0/0x6c
Jun 12 04:24:26 host84 kernel:  [<c030c869>] br_nf_forward_ip+0xcd/0x17d
Jun 12 04:24:27 host84 kernel:  [<c030c664>] br_nf_forward_finish+0x0/0x138
Jun 12 04:24:27 host84 kernel:  [<c0307195>] br_forward_finish+0x0/0x6c
Jun 12 04:24:27 host84 kernel:  [<c02cf7bc>] nf_iterate+0x58/0x84
Jun 12 04:24:27 host84 kernel:  [<c0307195>] br_forward_finish+0x0/0x6c
Jun 12 04:24:27 host84 kernel:  [<c0307195>] br_forward_finish+0x0/0x6c
Jun 12 04:24:27 host84 kernel:  [<c02cf853>] nf_hook_slow+0x6b/0x11c
Jun 12 04:24:27 host84 kernel:  [<c0307195>] br_forward_finish+0x0/0x6c
Jun 12 04:24:27 host84 kernel:  [<c03072ea>] __br_forward+0x73/0x7d
Jun 12 04:24:27 host84 kernel:  [<c0307195>] br_forward_finish+0x0/0x6c
Jun 12 04:24:28 host84 kernel:  [<c03073f1>] br_flood+0x80/0xf1
Jun 12 04:24:28 host84 kernel:  [<c0307277>] __br_forward+0x0/0x7d
Jun 12 04:24:28 host84 kernel:  [<c03074b4>] br_flood_forward+0x27/0x33


Jun 12 04:24:29 host84 kernel: swapper: page allocation failure. order:0,
mode:0x20
Jun 12 04:24:29 host84 kernel:  [<c01396d4>] __alloc_pages+0x205/0x2fd
Jun 12 04:24:29 host84 kernel:  [<c01517d5>] kmem_getpages+0x35/0x96
Jun 12 04:24:29 host84 kernel:  [<c01524b4>] cache_grow+0xa8/0x173
Jun 12 04:24:29 host84 kernel:  [<c0152745>] cache_alloc_refill+0x1c6/0x1f6
Jun 12 04:24:29 host84 kernel:  [<c015294d>] kmem_cache_alloc+0x64/0x68
Jun 12 04:24:29 host84 kernel:  [<c02ba98e>] alloc_skb_from_cache+0x50/0x103
Jun 12 04:24:29 host84 kernel:  [<c0251f47>] __dev_alloc_skb+0x4d/0x79
Jun 12 04:24:29 host84 kernel:  [<c0259eba>] netif_be_start_xmit+0x7f/0x21a
Jun 12 04:24:29 host84 kernel:  [<c02c0313>] dev_queue_xmit+0x1a4/0x35c
Jun 12 04:24:29 host84 kernel:  [<c03070e7>] br_dev_queue_push_xmit+0x77/0x125
Jun 12 04:24:29 host84 kernel:  [<c030cf09>] br_nf_post_routing+0xdd/0x19d
Jun 12 04:24:29 host84 kernel:  [<c030cddf>] br_nf_dev_queue_xmit+0x0/0x4d
Jun 12 04:24:29 host84 kernel:  [<c0307070>] br_dev_queue_push_xmit+0x0/0x125
Jun 12 04:24:29 host84 kernel:  [<c02cf7bc>] nf_iterate+0x58/0x84
Jun 12 04:24:29 host84 kernel:  [<c0307070>] br_dev_queue_push_xmit+0x0/0x125
Jun 12 04:24:29 host84 kernel:  [<c0307070>] br_dev_queue_push_xmit+0x0/0x125
Jun 12 04:24:29 host84 kernel:  [<c02cf853>] nf_hook_slow+0x6b/0x11c
Jun 12 04:24:29 host84 kernel:  [<c0307070>] br_dev_queue_push_xmit+0x0/0x125
Jun 12 04:24:29 host84 kernel:  [<c03071f5>] br_forward_finish+0x60/0x6c
Jun 12 04:24:29 host84 kernel:  [<c0307070>] br_dev_queue_push_xmit+0x0/0x125
Jun 12 04:24:29 host84 kernel:  [<c030c6bd>] br_nf_forward_finish+0x59/0x138
Jun 12 04:24:29 host84 kernel:  [<c0307195>] br_forward_finish+0x0/0x6c
Jun 12 04:24:29 host84 kernel:  [<c030c869>] br_nf_forward_ip+0xcd/0x17d
Jun 12 04:24:29 host84 kernel:  [<c030c664>] br_nf_forward_finish+0x0/0x138
Jun 12 04:24:29 host84 kernel:  [<c0307195>] br_forward_finish+0x0/0x6c


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