[2.6.25.8] "kswapd0: page allocation failure. order:3" in tcp_collapse
From: Tilman Schmidt
Date: Tue Jul 01 2008 - 18:30:48 EST
My Intel Pentium D940 system, Intel DQ965GF mainboard, 2 GB RAM, running an
x86_32 build of kernel release 2.6.25.8 with openSUSE 10.3 userland, produced
the message in the subject accompanied by a stack backtrace, seven times in a
row within a few milliseconds, during the nightly backup of a Windows system
through Bacula over the LAN. The backup did not report an error, though, and
everything else seems to be running normally, too.
The kernel is built with CONFIG_SLUB=y.
ts@xenon:~/kernel> uname -a
Linux xenon 2.6.25.8-testing #1 SMP PREEMPT Sun Jun 22 19:46:14 CEST 2008 i686 i686 i386 GNU/Linux
ts@xenon:~/kernel> uptime
11:25pm up 8 days 3:05, 3 users, load average: 0.51, 0.62, 0.77
ts@xenon:~/kernel> slaptop
Active / Total Objects (% used) : 361572 / 398951 (90.6%)
Active / Total Slabs (% used) : 25567 / 25567 (100.0%)
Active / Total Caches (% used) : 53 / 58 (91.4%)
Active / Total Size (% used) : 159455.84K / 164085.54K (97.2%)
Minimum / Average / Maximum Object : 0.01K / 0.41K / 4.44K
OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME
151767 151248 99% 0.84K 16863 9 134904K ext3_inode_cache
73500 72274 98% 0.16K 2940 25 11760K dentry
59008 37022 62% 0.06K 922 64 3688K buffer_head
26176 23505 89% 0.06K 409 64 1636K kmalloc-64
19084 13645 71% 0.29K 1468 13 5872K radix_tree_node
12190 11418 93% 0.09K 265 46 1060K vm_area_struct
10540 10427 98% 0.05K 124 85 496K sysfs_dir_cache
9680 8491 87% 0.25K 605 16 2420K kmalloc-256
6144 5160 83% 0.02K 24 256 96K kmalloc-16
4760 4570 96% 0.05K 56 85 224K anon_vma
4096 4093 99% 0.01K 8 512 32K kmalloc-8
3230 3065 94% 0.02K 19 170 76K Acpi-Namespace
1920 1712 89% 0.03K 15 128 60K kmalloc-32
1888 1415 74% 0.12K 59 32 236K kmalloc-128
1785 1703 95% 0.05K 21 85 84K ext3_xattr
1765 1760 99% 0.73K 353 5 1412K shmem_inode_cache
Excerpt from /var/log/messages:
Jul 1 23:15:41 xenon kernel: [166248.671993] kswapd0: page allocation failure. order:3, mode:0x4020
Jul 1 23:15:41 xenon kernel: [166248.671993] Pid: 185, comm: kswapd0 Not tainted 2.6.25.8-testing #1
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c01644cc>] __alloc_pages+0x2ec/0x308
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c017c35c>] __slab_alloc+0x1f2/0x575
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c017d3e0>] __kmalloc_track_caller+0x8d/0x105
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c02d3808>] ? tcp_collapse+0x136/0x331
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c02d3808>] ? tcp_collapse+0x136/0x331
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c02a4c3e>] __alloc_skb+0x4a/0x107
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c02d3808>] tcp_collapse+0x136/0x331
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c02d3b5e>] tcp_prune_queue+0x15b/0x1c4
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c02d3d9d>] tcp_data_queue+0x1d6/0xaea
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c02d5da2>] tcp_rcv_established+0x75b/0x80d
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c02caa42>] ? __inet_lookup_established+0x16c/0x176
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c02db0fb>] tcp_v4_do_rcv+0x255/0x3e2
Jul 1 23:15:41 xenon kernel: [166248.671993] [<c031517a>] ? _spin_lock_nested+0x4f/0x57
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c02dccea>] tcp_v4_rcv+0x69b/0x6ec
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c02c41a1>] ip_local_deliver_finish+0xf6/0x19a
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c02c45a4>] ip_local_deliver+0x61/0x6d
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c02c408c>] ip_rcv_finish+0x288/0x2a7
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c02a450f>] ? __kfree_skb+0x63/0x66
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c02c4519>] ip_rcv+0x202/0x22c
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c02a8efa>] netif_receive_skb+0x377/0x3ab
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c027a3a3>] e1000_receive_skb+0x127/0x145
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c027c433>] e1000_clean_rx_irq+0x1df/0x270
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c0279343>] e1000_clean+0x5b/0x1f5
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c02ab043>] net_rx_action+0xa7/0x202
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c012b9ee>] __do_softirq+0x77/0xe5
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c0109e21>] do_softirq+0x74/0xd8
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c015aeb5>] ? handle_edge_irq+0x0/0x10d
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c012b8e8>] irq_exit+0x46/0x88
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c0109f48>] do_IRQ+0xc3/0xdb
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c01085a6>] common_interrupt+0x2e/0x34
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c019b4d3>] ? free_buffer_head+0x17/0x5d
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c019b8fe>] try_to_free_buffers+0x76/0x85
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c01610ad>] try_to_release_page+0x3b/0x3f
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c0167ef4>] shrink_page_list+0x404/0x501
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c0141009>] ? put_lock_stats+0xd/0x21
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c014106d>] ? lock_release_holdtime+0x50/0x56
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c0315867>] ? _spin_unlock_irq+0x22/0x4b
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c0142b4c>] ? trace_hardirqs_on+0xe8/0x11d
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c01680e8>] shrink_inactive_list+0xf7/0x33c
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c01683e7>] shrink_zone+0xba/0xd9
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c0168a83>] kswapd+0x2a1/0x3ec
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c01674e5>] ? isolate_pages_global+0x0/0x3e
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c0137c2a>] ? autoremove_wake_function+0x0/0x30
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c01687e2>] ? kswapd+0x0/0x3ec
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c0137b6c>] kthread+0x3b/0x63
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c0137b31>] ? kthread+0x0/0x63
Jul 1 23:15:41 xenon kernel: [166248.671994] [<c0108847>] kernel_thread_helper+0x7/0x10
Jul 1 23:15:41 xenon kernel: [166248.671994] =======================
Jul 1 23:15:41 xenon kernel: [166248.671994] Mem-info:
Jul 1 23:15:41 xenon kernel: [166248.671994] DMA per-cpu:
Jul 1 23:15:41 xenon kernel: [166248.671994] CPU 0: hi: 0, btch: 1 usd: 0
Jul 1 23:15:41 xenon kernel: [166248.671994] CPU 1: hi: 0, btch: 1 usd: 0
Jul 1 23:15:41 xenon kernel: [166248.671994] Normal per-cpu:
Jul 1 23:15:41 xenon kernel: [166248.671994] CPU 0: hi: 186, btch: 31 usd: 179
Jul 1 23:15:41 xenon kernel: [166248.671994] CPU 1: hi: 186, btch: 31 usd: 155
Jul 1 23:15:41 xenon kernel: [166248.671994] HighMem per-cpu:
Jul 1 23:15:41 xenon kernel: [166248.671994] CPU 0: hi: 186, btch: 31 usd: 77
Jul 1 23:15:41 xenon kernel: [166248.671994] CPU 1: hi: 186, btch: 31 usd: 66
Jul 1 23:15:41 xenon kernel: [166248.671994] Active:192629 inactive:196893 dirty:102 writeback:0 unstable:0
Jul 1 23:15:41 xenon kernel: [166248.671994] free:16544 slab:97362 mapped:29644 pagetables:951 bounce:0
Jul 1 23:15:41 xenon kernel: [166248.671994] DMA free:3492kB min:64kB low:80kB high:96kB active:8kB inactive:0kB present:16160kB pages_scanned:4 all_unreclaimable? no
Jul 1 23:15:41 xenon kernel: [166248.671994] lowmem_reserve[]: 0 867 1979 1979
Jul 1 23:15:41 xenon kernel: [166248.671994] Normal free:59700kB min:3736kB low:4668kB high:5604kB active:241664kB inactive:176036kB present:888800kB pages_scanned:0 all_unreclaimable? no
Jul 1 23:15:41 xenon kernel: [166248.671994] lowmem_reserve[]: 0 0 8892 8892
Jul 1 23:15:41 xenon kernel: [166248.671994] HighMem free:2984kB min:512kB low:1708kB high:2904kB active:528844kB inactive:611536kB present:1138272kB pages_scanned:0 all_unreclaimable? no
Jul 1 23:15:41 xenon kernel: [166248.671994] lowmem_reserve[]: 0 0 0 0
Jul 1 23:15:41 xenon kernel: [166248.671994] DMA: 9*4kB 74*8kB 31*16kB 0*32kB 1*64kB 0*128kB 1*256kB 0*512kB 0*1024kB 1*2048kB 0*4096kB = 3492kB
Jul 1 23:15:41 xenon kernel: [166248.671994] Normal: 3813*4kB 5056*8kB 238*16kB 1*32kB 1*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 59732kB
Jul 1 23:15:41 xenon kernel: [166248.671994] HighMem: 44*4kB 187*8kB 10*16kB 14*32kB 5*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2984kB
Jul 1 23:15:41 xenon kernel: [166248.671994] 266122 total pagecache pages
Jul 1 23:15:41 xenon kernel: [166248.671994] Swap cache: add 1194, delete 994, find 236/310
Jul 1 23:15:41 xenon kernel: [166248.671994] Free swap = 4200040kB
Jul 1 23:15:41 xenon kernel: [166248.671994] Total swap = 4200988kB
Jul 1 23:15:41 xenon kernel: [166248.671994] Free swap: 4200040kB
Jul 1 23:15:41 xenon kernel: [166248.671994] 517888 pages of RAM
Jul 1 23:15:41 xenon kernel: [166248.671994] 288512 pages of HIGHMEM
Jul 1 23:15:41 xenon kernel: [166248.671994] 9344 reserved pages
Jul 1 23:15:41 xenon kernel: [166248.671994] 168001 pages shared
Jul 1 23:15:41 xenon kernel: [166248.671994] 200 pages swap cached
Jul 1 23:15:41 xenon kernel: [166248.671994] 102 pages dirty
Jul 1 23:15:41 xenon kernel: [166248.671994] 0 pages writeback
Jul 1 23:15:41 xenon kernel: [166248.671994] 29644 pages mapped
Jul 1 23:15:41 xenon kernel: [166248.671994] 97362 pages slab
Jul 1 23:15:41 xenon kernel: [166248.671994] 951 pages pagetables
Should I worry? File a bug? Post more details? Just ignore it?
Thanks,
Tilman
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